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Voyage charter party

A voyage charter party is a contract of affreightment under which a shipowner places a named vessel and its crew at a charterer’s disposal for one or more specified voyages, receiving in return a freight payment calculated either per tonne of cargo carried or as a single lump sum for the voyage. It is the oldest and most prevalent form of ship chartering, governing the bulk of seaborne commodity movements - grain, coal, iron ore, crude oil, refined products, and chemicals - and generating a body of case law, standard-form documentation, and commercial practice that stretches back several centuries. The central commercial distinction from a time charter party is the allocation of voyage risk: in a voyage charter the owner bears all operating costs including bunkers, port dues, canal tolls, and crew wages, and the owner profits or suffers according to how efficiently those costs are managed against the fixed freight earned. Charterers bear the risk of vessel delay at the loading or discharging port through the demurrage and despatch mechanism, which converts idle port time into a financial penalty or reward. ShipCalculators.com provides a suite of tools covering laytime and demurrage calculation, Worldscale freight rates, time charter equivalent conversion, and voyage profit analysis that underpin day-to-day chartering operations.

Contents

Background and history

The voyage charter is the contractual descendant of the earliest forms of merchant shipping, in which the master of a vessel contracted directly with merchants to carry specific parcels of cargo between named ports. Before the development of the time charter in the mid-19th century, the voyage charter was effectively the only instrument by which cargo moved commercially by sea. Roman maritime law recognised a locatio conductio navis, a contract for the hire of a vessel for carriage, that shares conceptual features with the modern voyage charter, and the medieval lex mercatoria elaborated these arrangements into recognisable form.

The printed standard form emerged in the 19th century as steam navigation made voyages more predictable and cargo volumes grew. Baltic Exchange brokers in London codified common terms to reduce negotiation friction. The Chamber of Shipping and, from 1905, the Baltic and International Maritime Council (BIMCO) began producing recommended standard forms that parties could adopt with minimal negotiation, reserving only the commercially sensitive variables - freight rate, laytime, demurrage rate - for bilateral bargaining. This architecture, a pre-printed standard with a negotiated rider and an attached recap telex or fixture note, remains the norm today.

The General Conditions for Charter Parties (GENCON) first appeared in 1922 and was substantially revised in 1976 and again in 1994. GENCON 94 became the dominant dry-cargo general-purpose form globally and was widely adopted for bulk, break-bulk, and project cargoes. BIMCO announced a further revision that was expected to produce a GENCON 2026 form incorporating updated arbitration, sanctions, and emissions clauses, though the precise release timeline remained subject to finalisation at the time of writing.

The oil majors developed their own proprietary tanker forms - SHELLVOY and the BP Voyage charter forms - which provided far greater specificity on matters such as heating, pumping warranties, and crude oil washing procedures. The tanker market also generated the Worldscale freight reference system, which emerged in its modern form in the 1950s and was codified under BIMCO auspices to allow freight rates for tanker voyages to be quoted as percentages of a published flat rate, providing a common benchmark across routes of vastly different distances and port costs.

A voyage charter party is a bilateral commercial contract and, at common law, is governed by general contract principles supplemented by shipping-specific rules. Formation requires offer, acceptance, and consideration; in the London market, a fixture is typically concluded by an exchange of recap messages by email between brokers acting for owner and charterer. The recap summarises all agreed commercial terms and is treated as binding even before a formal charter party document is drawn up and signed. The formal charter party, once issued, supersedes the recap on any point where they differ.

The document is not a bill of lading. The charter party governs the relationship between owner and charterer; bills of lading issued under a voyage charter party record the contract of carriage between the carrier and each individual shipper or consignee of cargo. Where cargo is shipped under a charter party, the bill of lading may incorporate the charter party’s terms by reference, but third-party holders take the bill subject to that incorporation only to the extent the incorporating language clearly identifies which terms are brought in.

English law is the governing law most commonly selected in voyage charter parties, partly because of the accumulated body of case law developed through London arbitration and the Commercial Court. New York law is used in many North American grain trades and in arbitration clauses following the Society of Maritime Arbitrators (SMA) rules. Singapore law has grown in prominence for Asia-Pacific fixtures.

Standard forms

GENCON 94

GENCON 94 is a two-part form. Part I is a box layout containing the commercially negotiated variables: vessel name and description, cargo quantity and type, loading and discharge ports, freight rate, laytime allowed, demurrage and despatch rates, laycan dates, and the governing arbitration seat. Part II sets out the standard printed conditions. The division means a party can read the key commercial terms of any GENCON fixture at a glance from Part I alone.

GENCON 94 is deliberately generic. It does not specify cargo-handling responsibilities in detail, leaving stevedoring and care-of-cargo obligations to be addressed in rider clauses. Commodity traders, grain houses, and coal importers routinely add bespoke rider clauses addressing moisture content, pre-loading surveys, temperature limits, and fumigation obligations. The Centrocon arbitration clause, providing for London arbitration, is commonly incorporated.

Oil major tanker forms

SHELLVOY 6 is the sixth revision of Shell’s voyage charter form, used for the carriage of crude oil and petroleum products aboard vessels nominated by the charterer from a pre-approved pool or nominated ad hoc. The form includes detailed provisions on heating and temperature maintenance obligations, pumping time and performance warranties, crude oil washing, and departure from port. BPVOY 5 is BP’s equivalent form and is structured similarly. Both forms allocate demurrage risk carefully, specifying the exact conditions under which the vessel is or is not considered to be on demurrage for delays caused by port congestion, weather, or equipment failure.

ASBATANKVOY, published by the Association of Ship Brokers and Agents (ASBA), is widely used in the US tanker market. INTERTANKVOY, a form developed by the International Association of Independent Tanker Owners (Intertanko), provides an alternative to the oil major forms for independent tonnage.

Specialised dry-cargo forms

NORGRAIN is the standard form for grain shipments to North America and is governed by the rules of the Board of Grain Trade of New York. It contains specific provisions dealing with the particular laytime counting practices of Great Lakes and US Gulf ports.

BIMCHEMVOY is BIMCO’s standard form for the carriage of chemicals in bulk, supplementing the terms of the IBC Code on cargo information obligations, tank preparation requirements, and the rights of the master to refuse cargo where documentation is deficient. Chemical tanker operators using this form are subject to the same Worldscale or lump-sum freight architecture as tanker trades, but with additional attention to compatibility, inhibition, and segregation requirements.

Structure of a voyage charter party

Vessel description clause

The vessel description clause identifies the ship by name, IMO number, flag, class notation, deadweight, and gross and net tonnage. It also typically states the vessel’s holds or tanks capacity, hatches or manifold configuration, and cranes or pumping capability. The description is the owner’s representation to the charterer; material inaccuracy entitles the charterer to damages and, if the misdescription goes to the root of the contract, to treat the charter as repudiated.

Classification is central to the description. Most voyage charters require the vessel to be maintained in class with a recognised classification society for the duration of the charter, and many require the vessel to be classed with a specific classification society named in Part I. A vessel that loses class during the voyage may place the owner in breach of both the charterparty and the flag state requirements under the ISM Code.

Cargo description and quantity clause

The cargo clause describes the commodity to be carried, its minimum and maximum quantity, and the loading tolerance - typically expressed as a percentage option in the owner’s or charterer’s favour. A clause reading “50,000 metric tonnes 10% more or less in owner’s option (MOLOO)” permits the owner to load between 45,000 and 55,000 tonnes, allowing the master to use the vessel’s carrying capacity efficiently within the constraints of the load line draught and port water densities. Options in the charterer’s favour (MOLCHOPT) are less common but arise where the charterer needs flexibility to adjust cargo based on market conditions at the loading port.

Cargo description also triggers obligations under the IMSBC Code for solid bulk cargoes and under the IBC Code for chemicals. The master has the right, and in many jurisdictions the duty, to refuse a cargo that does not match the description given in the charter party or that presents an undisclosed hazard.

Loading and discharge ports

The charter party names the loading port and the discharge port, which may be single ports, a range of ports, or, in tanker charters, a combination such as “one safe port Rotterdam, one or two safe berths, charterers’ option.” Multiple loading or discharge ports increase voyage complexity and cost; where a port range is given, the order in which ports are called is usually at the charterer’s nomination, subject to a “reasonable rotation” requirement in some forms.

The safe port warranty is one of the most litigated obligations in voyage chartering. Under English law, a charterer who nominates a port warrants that it is safe at the time of nomination and will remain safe throughout the vessel’s stay. The leading authority is Leeds Shipping Co v Société Française Bunge (The Eastern City) [1958] 2 Lloyd’s Rep 127, in which Sellers LJ defined a safe port as one the vessel can reach, lie at, and depart from without, in the absence of some abnormal occurrence, being exposed to danger which cannot be avoided by good navigation and seamanship. Kodros Shipping Corp v Empresa Cubana de Fletes (The Evia No 2) [1983] 1 AC 736 further developed the English law test. The subsequent decision in Pacific Basin IHX Ltd v Bulkhandling Handymax AS (The Triton Lark) [2012] EWHC 70 (Comm) confirmed that the warranty is promissory - the charterer promises the nominated port will be safe, and breach does not require fault.

The safe berth warranty operates on similar principles. Oceanfocus Shipping Ltd v Hyundai Merchant Marine Co Ltd (The Hawk) [1999] 1 Lloyd’s Rep 176 and Gard Marine & Energy Ltd v China National Chartering Corp (The Ocean Victory) [2017] UKSC 35 examined the interaction between the safe port warranty and ice clauses. The Supreme Court in The Ocean Victory held that the warranty covers only conditions that are abnormal for the port in question, not unusual weather that is a known characteristic of the port at the relevant time of year.

Freight clause

Freight is the consideration moving from charterer to owner. In a voyage charter, freight is calculated either per unit of cargo (most commonly per metric tonne) or as a lump sum for the voyage. Per-tonne freight means the total earned depends on the quantity actually loaded and discharged; a lump-sum freight is fixed regardless of quantity, subject to express provisions adjusting for short delivery.

Freight is described as “prepaid” if it is due and payable on shipment, before delivery, and “collect” (or “payable at destination”) if it is due only on delivery of cargo in full. Prepaid freight passes the freight risk to the shipper: if the cargo is lost in transit, the freight has already been earned and need not be refunded unless the charter party or bill of lading expressly provides otherwise. The legal default in English law is that freight is earned on delivery at destination; express prepaid clauses reverse this default.

The lien on cargo is the owner’s principal security for freight. Most voyage charter parties include a freight lien clause entitling the owner to detain the cargo at the discharge port until freight and demurrage have been paid. The lien must be exercised consistently with port state law; in some jurisdictions the right of lien cannot be exercised against goods owned by third parties who took the bill of lading without notice of the lien.

Worldscale for tanker freight

The tanker market uses the Worldscale scale to express freight rates for individual voyages. Worldscale (formally the New Worldwide Tanker Nominal Freight Scale, maintained jointly by Worldscale Association (London) and Worldscale Association (NYC)) publishes a flat rate in US dollars per metric tonne for every combination of loading port and discharge port, calculated to provide a nominal return on a standard vessel undertaking that route. The flat rate is updated annually to reflect changes in bunker costs, port costs, and canal dues for the standard vessel model.

Freight for a particular fixture is then quoted as a percentage of the applicable Worldscale flat rate. A rate of WS100 means the freight equals the published flat rate exactly. WS80 represents a 20% discount to the flat rate, reflecting a weak market; WS150 represents a 50% premium, reflecting strong demand or tight tonnage. The Worldscale freight rate calculator converts a WS rate into a dollars-per-tonne freight figure for any given Worldscale route. The reference vessel underpinning Worldscale calculations assumed a 75,000-deadweight-tonne tanker with a nominal consumption and port-time model; real vessels deviate from this reference in ways that brokers and operators account for in negotiation.

Laytime

Laytime is the period agreed in the charter party within which the charterer is entitled to load or discharge cargo without incurring additional charges. It is the central commercial risk allocation mechanism for port efficiency, placing the cost of slow cargo handling on the charterer while ensuring the owner is compensated for vessel time lost above the contractual allowance.

Commencement of laytime

Laytime does not begin to run automatically on the vessel’s arrival at port. Three conditions must ordinarily be satisfied: the vessel must have arrived at the contractual destination, it must be ready to load or discharge, and a valid notice of readiness (NOR) must have been tendered to the charterer, shipper, or receiver.

Arrival depends on the contractual designation of the port. Under an “arrived ship” clause, the vessel arrives when it reaches the area within which vessels waiting for a berth customarily lie, known as the commercial area of the port. The relevant authorities are Johanna Oldendorff (E L Oldendorff & Co GmbH v Tradax Export SA) [1974] AC 479 (HL), which established the “Reid test”: the vessel arrives when it reaches a position within the port where vessels waiting for a berth usually wait, and Maratha Envoy (Federal Commerce & Navigation Co Ltd v Tradax Export SA) [1978] AC 1 (HL), which distinguished port charters from berth charters and confirmed that under a berth charter the vessel does not arrive - and time does not begin - until it is at the contractual berth.

The “WIBON” (whether in berth or not) qualification is a standard mechanism for converting a berth charter into something approaching a port charter for laytime purposes. Where WIBON is included, laytime commences once the NOR has been tendered at the waiting anchorage, even if the named berth is not yet available.

The vessel must also be ready - physically and documentarily - to perform the cargo operation before the NOR is valid. Physical readiness means holds or tanks are cleaned to the standard required for the cargo. Documentary readiness means all certificates, clearances, and approvals needed to commence loading or discharging are in order. A vessel that tenders NOR before completing hold cleaning or before obtaining free pratique does not tender a valid NOR, and laytime does not begin until both conditions are satisfied, even if the vessel subsequently becomes ready.

The NOR tendering and laytime calculation tool assists operators in determining precisely when laytime commences and how it accumulates under various charter party regimes.

Laytime counting regimes

Charter parties specify the rate at which laytime counts by reference to a code of abbreviations. The principal regimes are:

SHINC (Sundays and Holidays Included) means laytime counts continuously seven days a week, regardless of whether port workers are operating. This regime is common in industrial ports where continuous cargo operations are standard.

SHEX (Sundays and Holidays Excluded) means time on Sundays and public holidays is not counted even if cargo operations continue. The more precise qualifier “SHEX UU” (unless used) means that if cargo operations do actually continue on a Sunday or holiday, the time used is counted.

WWSHINC (Weather Working Days, Sundays and Holidays Included) counts only days on which the weather permits cargo operations, including Sundays and holidays. The question of whether weather actually prevented work on a given day frequently generates disputes. Reardon Smith Line Ltd v Ministry of Agriculture (The Vancouver Strikes) [1963] AC 691 established the principle that “weather working” connotes days on which the weather does not interrupt or would not have interrupted cargo operations.

WWSHEX (Weather Working Days, Sundays and Holidays Excluded) combines weather and calendar exclusions. This is a common standard for grain trades.

FHEX (Fridays and Holidays Excluded) is used in ports where Friday is the weekly day of rest, primarily in the Arabian Gulf and North Africa.

Laytime may be reversible or non-reversible. Under reversible laytime, the total allowed time at all ports is pooled: time saved at the loading port can be applied against time used at the discharge port. Under non-reversible laytime, each port is assessed independently, and savings at one port cannot offset overrun at another. Non-reversible laytime is the commercial default; reversibility requires an express clause.

The laytime and demurrage calculation tool computes the aggregate laytime used and the resulting demurrage or despatch under both reversible and non-reversible regimes.

Statement of facts

The Statement of Facts (SOF) is the contemporaneous record maintained at each port recording the times of all events relevant to laytime: arrival at anchorage, tendering of NOR, movement to berth, commencement and completion of cargo operations, stoppages and their causes, completion and sailing. It is typically prepared by the ship’s agent and countersigned by a ship’s officer on behalf of the master. The SOF forms the evidentiary basis for any demurrage or despatch claim; where the SOF is ambiguous or disputed, parties may rely on the ship’s log, the master’s port log, and stevedore completion certificates.

BIMCO’s standard Statement of Facts form provides a structured tabular layout that captures events in chronological sequence with columns for date, time, and description. Many ports use terminal-specific equivalents. A complete and properly countersigned SOF materially reduces the risk of post-fixture dispute over laytime calculation.

Demurrage and despatch

Demurrage

Demurrage is the financial compensation payable by the charterer to the owner when the charterer uses more than the agreed laytime for cargo operations. The demurrage rate, expressed as a daily or hourly figure, is agreed in Part I of the charter party. Once demurrage has commenced, the principle “once on demurrage always on demurrage” applies under English law: the clock does not stop for weather, breakdowns, or any other cause unless the charter party contains an express clause to that effect. Dias Compania Naviera SA v Louis Dreyfus Corp (The Dias) [1978] 1 WLR 261 confirmed this principle.

The demurrage rate is typically set at a level approximating - but usually somewhat below - the vessel’s daily hire equivalent, so as to represent a genuine pre-estimate of the owner’s loss without constituting a penalty. Where the rate is excessively high relative to any conceivable actual loss, courts have on occasion considered whether it is enforceable as a penalty clause, though English courts have generally upheld agreed demurrage rates as liquidated damages.

Demurrage claims are subject to a claim submission deadline in many charter parties. GENCON 94 Clause 9 requires demurrage claims to be submitted with supporting documentation within 90 days of completion of discharge; failure to comply within the stipulated period extinguishes the right to claim. Parties should note that this clause has generated considerable case law on what constitutes adequate documentation and on the effect of partial submissions within the time limit.

The demurrage calculator and the demurrage and despatch summary calculator allow operators to compute outstanding demurrage balances and validate claim amounts before submission.

Despatch

Despatch is the mirror image of demurrage: where the charterer completes cargo operations in less time than the allowed laytime, the owner pays the charterer for the time saved. Despatch is an incentive for the charterer to facilitate efficient cargo operations. The despatch rate is by convention set at half the demurrage rate (“despatch at half demurrage” or DHD), though express agreement to a different rate is possible.

Not all voyage charter parties include a despatch obligation; some expressly exclude it (“no despatch”). Others limit despatch to working time saved, meaning that only periods that form part of the laytime regime count when calculating savings; periods that were excluded from laytime (Sundays, holidays, weather time) are also excluded from the despatch calculation under “despatch on working time saved” (WTS) provisions, as opposed to “despatch on all time saved” (ATS).

The voyage profit calculator incorporates despatch earnings as a positive revenue line when modelling overall voyage economics.

Laycan

The laycan - laydays and cancelling date - defines the window within which the vessel must arrive and tender NOR at the loading port. The earliest layday is the date before which the owner has no obligation to present the vessel; the cancelling date is the last date by which the charterer expects the vessel. If the vessel fails to arrive and tender NOR by the cancelling date, the charterer has the option to cancel the charter party. The right to cancel is an option, not an automatic termination; the charterer must elect whether to cancel once the cancelling date has passed.

Under English law, the charterer need not decide whether to cancel until the vessel actually arrives or the owner informs the charterer of the expected arrival date. The Mihalis Angelos (Maredelanto Compania Naviera SA v Bergbau-Handel GmbH) [1971] 1 QB 164 (CA) established that an owner’s false statement of expected readiness at the time of fixture, where the owner knew the vessel could not be ready, constituted an anticipatory breach entitling the charterer to treat the contract as at an end even before the cancelling date arrived.

The laycan range is typically narrow - often three to five days in a liquid tanker market, or seven to 14 days for a dry-bulk fixture placed well in advance. A wider laycan reduces the owner’s scheduling risk but diminishes the charterer’s ability to plan cargo logistics. The commercial charter party standard tool assists operators in evaluating laycan windows against vessel schedules.

Notice of readiness

The Notice of Readiness (NOR) is the formal communication from the master to the charterer, shipper, or their agents stating that the vessel has arrived at the contractual destination and is ready in all respects to load or discharge. Tendering the NOR triggers the commencement of laytime (subject to any agreed notice time - typically two or six hours after tendering before laytime actually begins - and subject to the vessel being within the laycan).

The validity requirements for an NOR have been extensively litigated. Transgrain Shipping BV v Global Transporte Oceanico SA (The Mexico 1) [1990] 1 Lloyd’s Rep 507 confirmed that a NOR tendered before the vessel is physically and documentarily ready is invalid and that a later valid NOR starts laytime afresh from the moment it is validly tendered. Glencore Grain Ltd v Flacker Shipping Ltd (The Happy Day) [2002] EWCA Civ 1068 qualified this, holding that the parties may by conduct accept an invalid NOR and treat laytime as running from the time of the defective tender.

The NOR must be tendered in writing in most jurisdictions and in accordance with any particular method or recipient specified in the charter party. Many modern charter parties allow transmission by email or to the agent rather than requiring physical delivery to the charterer.

Voyage costs and their allocation

The fundamental economics of the voyage charter rest on the distinction between costs borne by the owner and those borne by the charterer.

Owner’s costs

The owner bears all voyage costs that are independent of the charterer’s instructions: bunkers for propulsion and auxiliary power for the entire voyage including ballast legs, port dues and pilotage at every call, canal tolls for the Suez or Panama routes (calculated via Suez Canal net tonnage tools or the Panama Canal toll calculator), P&I insurance, hull and machinery insurance, crew wages and victualling, and ship management costs. The owner also bears the cost of hold or tank cleaning between fixtures. Bunkers represent by far the largest single voyage cost and are the primary driver of voyage profit or loss under conditions of fixed freight.

The voyage fuel and CO2 calculator estimates bunker consumption and associated carbon dioxide emissions for a given voyage distance and speed, feeding directly into voyage profitability analysis. The bunker adjustment factor calculator addresses clauses in some charters that allow the freight rate to be adjusted if bunker prices deviate materially from the level assumed at the time of fixture.

Charterer’s costs

The charterer bears freight, demurrage (or receives despatch), and the costs of cargo-handling operations at both loading and discharge ports where the charter party places stevedoring on the charterer’s account (a “free in and out” or FIO arrangement). Under a “liner terms” or “berth terms” arrangement the owner’s freight includes cargo handling, placing that cost on the owner. The distinction between FIO, FIOS (free in, out, and stowed), FIOST (free in, out, stowed, and trimmed), and liner terms materially affects the comparative freight levels at which owner and charterer are indifferent between forms.

The voyage port disbursement account tool calculates the disbursements agents will advance on behalf of vessels at port - port dues, pilotage, towage, fresh water, and launch services - which under a voyage charter fall to the owner’s account.

Time charter equivalent

The time charter equivalent (TCE) converts voyage charter earnings into a daily hire rate equivalent, enabling comparison with time charter offers and with market benchmarks published by the Baltic Exchange. The TCE equals voyage freight revenue minus voyage costs (bunkers, port dues, canals) divided by the total voyage days including the laden and ballast legs. The TCE voyage calculator computes TCE from voyage parameters. The Capesize TCE tool provides market-specific benchmarks for the largest dry-bulk vessels. The break-even freight calculator identifies the minimum freight rate at which a given voyage covers all costs, a key analytical tool for whether to accept a fixture or lay up.

Arbitration

The great majority of voyage charter parties incorporating English law provide for London arbitration under the London Maritime Arbitrators Association (LMAA) Terms. The LMAA provides three tiers of procedure: the Small Claims Procedure for claims up to US$100,000, the Intermediate Claims Procedure for claims between US$100,000 and US$400,000, and the full procedure for larger claims. Arbitration costs in London maritime matters are substantial; the charter arbitration cost estimator and the arbitration cap calculator assist parties in evaluating whether the economics of a demurrage or despatch claim justify pursuing arbitration.

New York arbitration under the Society of Maritime Arbitrators (SMA) rules is the alternative for contracts governed by US law, particularly in the NORGRAIN and ASBA forms common in the North American grain and tanker trades. Singapore arbitration under the Singapore Chamber of Maritime Arbitration (SCMA) rules is gaining ground in Asia-Pacific fixtures.

Cargo liability and Hague-Visby Rules

Cargo claims arising under a voyage charter are governed primarily by the applicable cargo liability convention incorporated into the bills of lading issued under the charter. In most international trades, the Hague-Visby Rules (formally the International Convention for the Unification of Certain Rules of Law relating to Bills of Lading, as amended by the Visby Protocols of 1968 and the SDR Protocol of 1979) set out the carrier’s minimum obligations and maximum immunities.

The carrier must before and at the beginning of the voyage exercise due diligence to make the ship seaworthy, properly man and equip the ship, make the holds fit and safe for the reception, carriage, and preservation of the goods (Hague-Visby Rules, Article III, rule 1). Against this duty the carrier enjoys a catalogue of defences including nautical fault, fire, perils of the sea, and latent defects not discoverable by due diligence (Article IV, rule 2). Cargo claimants must bring suit within one year of delivery or the date when delivery should have taken place (Article III, rule 6).

The financial limit under the 1979 SDR Protocol is the higher of 666.67 Special Drawing Rights per package or 2 SDRs per kilogramme of gross weight. These limits apply per package unit or per kilogramme depending on which calculation yields the higher recovery. Container ship operators and bulk carriers interact with these limits differently; the bill of lading article addresses the full liability framework in detail.

Cargo claims may arise independently of laytime disputes and can be pursued by the bill of lading holder as well as the charterer, complicating situations where the charterer and the cargo owner are different parties. Proper maintenance of the cargo securing manual and compliance with segregation requirements under the IMSBC Code reduce the risk of cargo damage claims.

Key cases in laytime and demurrage

Several House of Lords and Supreme Court decisions have shaped the law on voyage charter laytime and demurrage to a degree that makes their facts and holdings essential knowledge for chartering professionals.

E L Oldendorff & Co GmbH v Tradax Export SA (Johanna Oldendorff) [1974] AC 479 resolved longstanding uncertainty about when a vessel “arrives” under a port charter. The vessel had anchored at a recognised waiting anchorage within the port limits but outside the commercial area. The House of Lords held that a vessel arrives when it is at a position within the port, or so near as to be within the commercial area of the port, where vessels of the relevant type customarily wait for a berth. The “Reid test” - named for Lord Reid’s speech - remains the foundation of English arrived ship law.

Federal Commerce & Navigation Co Ltd v Tradax Export SA (Maratha Envoy) [1978] AC 1 distinguished the Oldendorff rule for berth charters. In a berth charter the vessel does not arrive until it is at the specific berth named in the charter party; the waiting anchorage rule of Oldendorff applies to port charters only. The practical consequence is that WIBON qualifications in berth charters are commercially significant: without WIBON, waiting at anchorage in a berth charter does not count as laytime.

Navios International Inc v Stelmar Shipping Ltd (The Kyzikos) [1989] AC 1 (HL) clarified the operation of weather exceptions. The vessel was at the loading berth ready to load but could not commence operations because of fog that prevented tugs from assisting inbound colliers delivering the cargo. The House of Lords held that the weather exception in the charter party extended to weather that physically prevented cargo operations even at the berth, regardless of whether the vessel itself was affected by the weather condition causing the delay.

Trafigura Maritime Logistics Pte Ltd v Clearlake Shipping Pte Ltd (The Zagora) [2017] EWHC 158 (Comm) addressed the demurrage claim submission time-bar in the context of partial documentation. The court held that delivery of a statement of facts alone was insufficient to satisfy the documentation requirement under the 90-day time bar where other relevant documents were not provided within the period; however, the court also examined whether the owners had done all that was reasonably practicable given the documents available to them.

Laycan and “expected ready to load” obligations

The owner’s obligation to proceed to the loading port with utmost despatch is implied in English law into voyage charter parties from the moment the charter party is concluded. The Mihalis Angelos (above) established that a “to be expected ready” clause in the charter party (stating the vessel is expected ready to load at port X on date Y) operates as a condition: if the statement is false at the time of making and the vessel could not reasonably have been at the named port on the stated date, the charterer has an immediate right to treat the charter as repudiated without waiting for the actual cancelling date. This decision is of practical importance in markets where owners occasionally overstate vessel positions to secure fixtures.

General average

General average is the doctrine under which extraordinary expenditures or sacrifices made for the common safety of the ship, cargo, and freight are shared proportionately among all parties with an interest in the adventure. York-Antwerp Rules 2016 (and the earlier 1994 Rules, still in use under many charters) govern the adjustment. When general average is declared, cargo is detained until contributions are secured or a general average bond and guarantee are obtained. The general average contribution calculator estimates cargo owners’ contributions under York-Antwerp Rules. The freight and demurrage deposit calculator addresses security requirements that may arise at discharge where both freight and general average contributions are simultaneously in dispute.

Regulatory overlay

BIMCO CII Operational Clause 2022

The Carbon Intensity Indicator (CII) rating system, introduced under MARPOL Annex VI from 1 January 2023, assigns vessels an annual operational carbon intensity rating from A to E. For more detail on the CII framework see what is CII and slow steaming and CII. The BIMCO CII Operational Clause 2022 provides a contractual mechanism for allocating CII-related obligations between owner and charterer in voyage charter parties. The clause requires the charterer to provide accurate cargo and distance information needed for the CII calculation and allows the owner to reject voyage instructions that would expose the vessel to a D or E rating if the vessel’s cumulative CII for the year is already under pressure. The CII voyage adjustment tool calculates the impact of a specific voyage on the vessel’s year-to-date CII rating. The voyage slow steaming calculator evaluates the effect of speed reduction on bunker consumption and CII.

EU ETS Allowances Clause 2023

The European Union Emissions Trading System (EU ETS) was extended to maritime transport from 1 January 2024, requiring shipowners to surrender EU Allowances (EUAs) covering a proportion of CO2 (and, from 2026, N2O and CH4) emissions on voyages touching EU ports. The phase-in covers 40% of emissions in 2024, 70% in 2025, and 100% from 2026. BIMCO’s EU ETS Allowances Clause 2023 allocates EUA procurement costs between owner and charterer in voyage charters: the charterer reimburses EUA costs proportionate to the cargo carried on the EU-covered voyage leg. The EU ETS for shipping article sets out the regulatory framework in full. The IMO DCS vs EU MRV article addresses the parallel data collection obligations that inform the EUA calculation.

FuelEU Maritime Clause 2024

FuelEU Maritime (Regulation (EU) 2023/1805) sets greenhouse gas intensity limits for the energy used on board vessels calling at EU ports, applying from 1 January 2025. Where a vessel’s GHG intensity exceeds the applicable limit, the operator faces a financial penalty (“FuelEU surplus”) which may alternatively be pooled with a compliant vessel. The BIMCO FuelEU Clause 2024 for voyage charters allocates the additional fuel costs and potential surplus penalties between owner and charterer based on the emissions attributable to the cargo carried. The FuelEU Maritime explained article and FuelEU penalties, pooling, and multipliers article cover the detailed calculation methodology.

Comparison with time charter

The voyage charter differs from the time charter party in three fundamental ways. First, the voyage charterer specifies the voyage; the time charterer directs the vessel’s employment over a period, with the owner’s master remaining obligated to follow lawful cargo-carrying orders. Second, the voyage owner bears bunkers and port costs; the time charterer pays for bunkers and port disbursements on behalf of the vessel during the charter period. Third, the voyage charter generates freight income that is voyage-specific; the time charter generates hire income that is time-specific, and the owner’s revenue is independent (within limits) of how efficiently the voyage is performed.

The TCE conversion bridges these two markets. An owner comparing a voyage charter offer against a time charter offer for the same vessel converts both to a daily hire equivalent to identify which offers superior net revenue. Where voyage TCEs exceed prevailing time charter rates, owners typically prefer to trade on voyage terms; where time charter rates are high relative to voyage TCEs, fixing on time charter reduces revenue uncertainty. The TCE benchmark tool provides this calculation alongside the voyage slow steaming and TCE tool.

Just-in-time arrival

Just-in-time (JIT) arrival is a voyage management practice in which vessels adjust speed to arrive at the loading or discharge port precisely when a berth becomes available, avoiding idle time at anchorage or, conversely, arriving late and consuming laytime. The practice has gained commercial importance because reducing idle steaming and anchorage time cuts bunker consumption, reduces CII exposure, and eliminates unnecessary port time. The JIT arrival optimisation tool computes the optimal speed reduction for a given remaining voyage distance and estimated berth availability time.

Port stay and voyage optimisation

Minimising total port time directly reduces total voyage days, improving the vessel’s TCE. The voyage port stay analysis tool tracks productive and unproductive port hours, distinguishing laytime counting periods from off-hire or off-demurrage periods. The sea cargo charter index tool provides market context by tracking prevailing freight rates against which individual fixture economics can be benchmarked.

See also

Additional calculators:

Additional formula references:

Additional related wiki articles:

References

  1. BIMCO, GENCON 94 Charter Party (Baltic and International Maritime Council, 1994).
  2. Worldscale Association (London) Ltd and Worldscale Association (NYC) Inc, New Worldwide Tanker Nominal Freight Scale, published annually.
  3. E L Oldendorff & Co GmbH v Tradax Export SA (Johanna Oldendorff) [1974] AC 479 (HL).
  4. Federal Commerce & Navigation Co Ltd v Tradax Export SA (Maratha Envoy) [1978] AC 1 (HL).
  5. Navios International Inc v Stelmar Shipping Ltd (The Kyzikos) [1989] AC 1 (HL).
  6. Gard Marine & Energy Ltd v China National Chartering Corp (The Ocean Victory) [2017] UKSC 35.
  7. Trafigura Maritime Logistics Pte Ltd v Clearlake Shipping Pte Ltd (The Zagora) [2017] EWHC 158 (Comm).
  8. Maredelanto Compania Naviera SA v Bergbau-Handel GmbH (The Mihalis Angelos) [1971] 1 QB 164 (CA).
  9. Leeds Shipping Co v Société Française Bunge (The Eastern City) [1958] 2 Lloyd’s Rep 127.
  10. Reardon Smith Line Ltd v Ministry of Agriculture (The Vancouver Strikes) [1963] AC 691 (HL).
  11. BIMCO, CII Operational Clause for Voyage Charter Parties (2022).
  12. BIMCO, EU ETS Allowances Clause for Voyage Charter Parties (2023).
  13. BIMCO, FuelEU Maritime Clause for Voyage Charter Parties (2024).
  14. International Convention for the Unification of Certain Rules of Law relating to Bills of Lading, Brussels, 25 August 1924, as amended by the Protocol of 23 February 1968 and the Protocol of 21 December 1979 (Hague-Visby Rules).
  15. York-Antwerp Rules 2016 (Comité Maritime International).
  16. Julian Cooke et al, Voyage Charters, 4th edn (Informa Law, 2014).
  17. Terence Coghlin et al, Time Charters, 7th edn (Informa Law, 2014).

Further reading

  • John Schofield, Laytime and Demurrage, 7th edn (Informa Law, 2016) - the definitive practitioner text on laytime calculation and demurrage claims.
  • Simon Baughen, Shipping Law, 7th edn (Routledge, 2019) - covers voyage and time charters in the context of the full shipping law curriculum.
  • BIMCO Idea (idea.bimco.org) - searchable database of BIMCO standard forms and clauses including current texts of GENCON 94 and all subsidiary clauses.