Background
Ship arrest is the procedural counterpart to the substantive lien. It is the method by which a claimant brings a vessel within the jurisdiction of an admiralty court, compels the shipowner or its insurers to put up security, and ultimately, if the claim is proven, achieves a court-ordered judicial sale that distributes proceeds in order of priority. The arrest power is one of the oldest and most distinctive features of admiralty practice. It exists in some form in every major maritime jurisdiction, although the categories of claim that justify arrest, the procedural steps required, and the rules on counter-security and wrongful arrest differ significantly between civil law and common law systems.
This article surveys maritime lien fundamentals, the principal categories of claim that give rise to liens and statutory rights of arrest, the international framework provided by the Brussels Arrest Convention 1952 and the 1999 Geneva Arrest Convention, jurisdictional variations between leading admiralty centres, the practical mechanics of obtaining and discharging an arrest, the role of P&I letters of undertaking, sister ship and associated ship arrest, and significant recent case law that has shaped the modern landscape.
Maritime Lien Fundamentals
A maritime lien in the strict sense is a substantive proprietary right that attaches at the moment the underlying claim arises. It is not a procedural device and it is not created by judgment. The four classical features identified by English admiralty jurisprudence and adopted in most common law jurisdictions are: it is a privileged claim, it attaches secretly without registration, it travels with the vessel into the hands of any subsequent owner, and it is enforceable by an action in rem.
The number of claims that generate a true maritime lien is small. Common law admiralty traditionally recognises five: damage caused by a ship (collision and other tort liens), salvage, seamen’s wages, master’s wages and disbursements, and bottomry and respondentia (now largely obsolete). Civil law jurisdictions following the French and continental tradition tend to recognise a longer but still defined list, typically by statute or by reference to the unratified Maritime Liens and Mortgages Conventions of 1926, 1967 and 1993.
Beyond the true maritime lien, most jurisdictions recognise a wider category of statutory rights of action in rem, sometimes loosely called statutory liens, which permit arrest of the vessel for claims such as supply of necessaries, port dues, agency fees, stevedoring charges, container leasing, charterparty hire, and bunker supplies. These statutory rights of action in rem do not survive a change of ownership in the same way as a true maritime lien. They depend on the defendant being the beneficial owner of the vessel both when the claim arose and when proceedings are commenced, subject to local variations.
The distinction between a true maritime lien and a statutory right in rem matters enormously for ranking and for survival. A salvage lien or a wages lien attaches even after sale; a necessaries supplier in England has only a statutory right that disappears once the ship is sold. In the United States, by contrast, the Commercial Instruments and Maritime Liens Act (CIMLA, 46 USC §31301 onwards) confers a true maritime lien for necessaries supplied on the order of the owner or a person authorised by the owner, which radically changes the ranking analysis.
Types and Ranking of Liens
The order of priority among competing claims against a vessel is determined by a combination of statute, convention, and judge-made law. The general structure recognised across most jurisdictions, with local variations, is broadly as follows:
First, costs of the arresting court and the marshal or sheriff in arresting, preserving, and selling the ship. These are paid before any claimant takes anything because without them there would be no fund.
Second, certain super-priority claims. Crew wages, including the master’s wages and accrued benefits, occupy the highest substantive rank in nearly every jurisdiction. The MLC 2006 framework has reinforced this priority and the Convention’s Regulation 2.5 and Regulation 4.2 ensure that wage and repatriation claims are protected even on insolvency. See the MLC 2006 article for the underlying labour rights regime.
Third, salvage liens. These rank ahead of mortgages and most other claims because, without the salvor’s intervention, there would be no asset to distribute. Salvage claims rank in inverse order of time, the later salvage taking priority over the earlier on the rationale that the latest salvor preserved the fund for everyone. The Salvage Convention 1989 and Lloyd’s Open Form (LOF 2020) provide the substantive framework.
Fourth, damage liens, principally collision claims and other torts where the ship herself caused the damage. In England and many Commonwealth jurisdictions, damage liens rank ahead of mortgages.
Fifth, the ship’s mortgage. The mortgage is registered against the vessel under the law of the flag and is the primary financing security used by ship finance banks. In ranking, mortgages typically come below the categories above but above general unsecured maritime claims.
Sixth, statutory rights of action in rem and other contractual maritime claims. These include necessaries, charterparty hire and damages, bills of lading cargo claims, towage and pilotage charges (where these are not themselves treated as liens), agency disbursements, container demurrage, and similar.
The interaction between US-law necessaries liens (which are true maritime liens) and foreign mortgages can produce complex conflict of laws disputes when a ship financed under a UK mortgage is supplied with bunkers in the US and arrested in a third jurisdiction.
Crew Wages and the Super-Priority
Seamen’s wages enjoy the highest practical priority in admiralty for reasons rooted in policy. The traditional rationale is that the seaman is the favoured creditor of the law because of the hazards of the calling, the difficulty of pursuing claims when the ship leaves port, and the social interest in ensuring that crews are paid. The MLC 2006 financial security provisions added a further layer requiring shipowners to maintain insurance or other financial security to cover up to four months of wages and repatriation costs in the event of abandonment.
Wages claims include not only basic pay but also overtime, leave pay, repatriation expenses, contractual bonuses, and contributions to social insurance schemes. Where a vessel is arrested and sold, the wages fund is usually paid in full from the sale proceeds before any other claimant takes. This is reinforced procedurally by the willingness of admiralty courts to grant priority for sale orders where crew remain unpaid on board.
The 2018-2020 wave of arrests of Russian-owned and Chinese-built vessels, and the COVID-era abandonments tracked by the joint ILO/IMO database, illustrated how often the wage lien is the only effective remedy for crew. The ISM Code and the company’s Designated Person Ashore obligations also intersect with abandonment scenarios.
Salvage and Tort Liens
The salvage lien arises automatically upon the rendering of salvage services to a vessel in danger, whether under contract (typically LOF 2020 or a fixed-price agreement) or as a “pure salvage” without prior agreement. The Salvage Convention 1989 provides the substantive framework. Article 13 sets out the criteria for assessing the salvage award, and Article 14 provides for special compensation where environmental damage is threatened, supplemented in practice by the SCOPIC clause incorporated into LOF.
Salvage liens have two distinctive features. First, they rank ahead of mortgages and most other liens. Second, multiple salvage liens rank inter se in inverse order of time, on the rationale that the later salvor preserved the fund. This is a deliberate departure from the usual “first in time, first in right” rule and is one of the few areas of admiralty where chronology is reversed.
Tort liens, principally collision damage liens, attach when the ship is the instrument of damage to another vessel, cargo, port infrastructure, or shore property. The lien attaches to the offending vessel as a procedural personification: the ship “did” the damage and is liable in rem. Tort liens rank ahead of mortgages in most common law jurisdictions but below crew wages and salvage. Cargo damage claims are normally not true maritime liens in English law but are statutory rights in rem that can support arrest.
Supplier Liens and Necessaries
The supply of “necessaries”, a term embracing bunkers, lubricants, stores, provisions, repairs, classification surveys, dry-docking, port agency services, and similar items reasonably required for the ship to perform her function, generates very different legal consequences in different jurisdictions.
In the United States, CIMLA confers a true maritime lien on the vessel for necessaries supplied on the order of the owner or a person authorised by the owner. Under 46 USC §31341, the master, the charterer, or anyone entrusted with management of the ship is presumed to be authorised. This makes the US a forum of choice for unpaid bunker suppliers, and the OW Bunker collapse in 2014 generated extensive US litigation on whether physical suppliers, contractual suppliers, or both could assert maritime liens against the receiving vessel.
In England, by contrast, no maritime lien arises for necessaries. The supplier has only a statutory right of action in rem under section 20 of the Senior Courts Act 1981, exercisable only if the relevant person was the beneficial owner or demise charterer when the claim arose and remains so when proceedings are commenced. A sale of the ship in the meantime extinguishes the right.
Civil law jurisdictions generally fall between these poles. The 1993 Maritime Liens and Mortgages Convention recognises a maritime lien for “claims arising out of physical loss or damage” caused by the ship, salvage, port and canal dues, claims arising out of personal injury and crew wages, but expressly excludes necessaries from the lien category, leaving them to be dealt with as ordinary contractual claims with possible rights of arrest under the local arrest regime.
Ship Arrest Procedure: In Rem and In Personam
In common law admiralty, the action in rem is the procedural device that enables a maritime lien or statutory right of action in rem to be enforced. The writ is issued against the vessel by name, served on the ship while she is within the jurisdiction (typically by attaching the writ to the mast or wheelhouse and giving copies to the master), and the ship is taken into the custody of the admiralty marshal or sheriff. Once arrested, the vessel cannot leave the port without leave of the court.
The companion action in personam is brought against the shipowner or other defendant personally. Many jurisdictions allow concurrent in rem and in personam proceedings on the same facts. Once the owner enters appearance to defend the in rem proceedings, the action effectively becomes one in personam and judgment can be enforced against the owner’s worldwide assets, although the arrested ship continues to provide security.
Civil law jurisdictions typically do not use the in rem/in personam distinction in the same form. They use a “saisie conservatoire” or similar protective seizure that operates as an attachment of the vessel to secure a substantive claim that will be litigated on the merits, often in a different forum. The vessel is treated as the property of the debtor against which security is asserted, rather than as a juridical defendant.
In both systems, the arrest is typically obtained ex parte on affidavit evidence, without notice to the shipowner, because the very purpose of the arrest is to catch the vessel before she sails. Most jurisdictions require the claimant to demonstrate a prima facie maritime claim within the categories permitting arrest, identification of the vessel and her current position, and in some jurisdictions an undertaking in damages for wrongful arrest.
Brussels Arrest Convention 1952 and the 1999 Convention
The International Convention Relating to the Arrest of Sea-going Ships, signed at Brussels on 10 May 1952 (the “1952 Convention”), is the principal international instrument governing ship arrest. It has been ratified by the United Kingdom, France, Germany, Italy, Spain, Belgium, the Netherlands, and many Commonwealth and Latin American jurisdictions, although notably not by the United States.
The 1952 Convention provides an exhaustive list of “maritime claims” in Article 1 for which a ship may be arrested. The list includes damage caused by any ship, loss of life or personal injury, salvage, agreements relating to the use or hire of any ship, agreements relating to the carriage of goods, loss or damage to goods, general average, towage, pilotage, supplies of goods or materials wherever supplied, construction, repair or equipment of any ship, master’s and crew wages, master’s disbursements, and disputes over title or possession of a ship. Arrest is permissible only for claims falling within these categories.
Article 3 introduces the “sister ship” rule, allowing arrest of any other vessel in the same ownership as the offending ship for the same claim. The drafters compromised on the question of associated company arrest by leaving the issue to national law.
The International Convention on Arrest of Ships 1999 (the “1999 Convention”), adopted in Geneva, was intended to modernise the 1952 regime. It expands the list of maritime claims to include port dues, environmental damage claims, insurance premiums, and commissions, and it tightens the sister ship rules. The 1999 Convention has had limited ratification, with around a dozen states parties as of 2025, and the practical international framework remains the 1952 Convention reinforced by national legislation.
Jurisdictional Variations: US, UK, Singapore, and Others
The United States operates under the Supplemental Admiralty Rules of the Federal Rules of Civil Procedure, particularly Rule B (attachment in personam) and Rule C (arrest in rem). The US is not party to either Arrest Convention and operates its own categories of claim. CIMLA’s broad definition of necessaries makes the US an attractive forum for bunker and supply claims, although the foreign forum non conveniens doctrine and the requirement that the vessel be present in the district can limit access.
England and Wales apply the Senior Courts Act 1981 sections 20-21 and the Civil Procedure Rules Practice Direction 61. England has adopted the 1952 Convention and the categories of claim in section 20(2) closely track Article 1 of the Convention. The English Admiralty Court is one of the busiest in the world and offers the advantages of well-developed procedural rules, an experienced bench, and the ability to obtain freezing injunctions against the shipowner’s worldwide assets in support of arrest proceedings.
Singapore operates the High Court (Admiralty Jurisdiction) Act 1961, modelled on the English statute. Singapore has emerged in the past two decades as Asia’s leading arrest jurisdiction, with a sophisticated bar, efficient marshal service, and proximity to the Malacca Strait shipping lanes. Hong Kong, Australia, Canada, New Zealand, and South Africa operate broadly similar regimes.
Continental jurisdictions including the Netherlands (Rotterdam), Belgium (Antwerp), France (Marseille, Le Havre), Spain, Italy, and Greece apply the 1952 Convention through national statutes, often with simplified procedures. The Netherlands has a particularly liberal arrest regime where conservatory arrest can be obtained on minimal documentation, leading to its use as a “first stop” jurisdiction for European claims.
Panama, Liberia, the Marshall Islands, and other major flag states have their own arrest regimes that interact with the flag state and flag of convenience framework but in practice arrests rarely take place in flag-state ports because the vessels are seldom there.
Discharge of Arrest: Security, Bond, and Letters of Undertaking
Once a ship is arrested, the shipowner has every commercial incentive to obtain her release as quickly as possible. A vessel under arrest is not earning hire and may be losing freight, accruing port dues, attracting demurrage exposure, and losing scheduled charters. The release is achieved by providing security in a form acceptable to the court or the claimant.
Three principal forms of security are used. First, payment into court of a sum sufficient to cover the claim plus interest and costs. This is the most secure form for the claimant but the most expensive for the owner because it ties up cash. Second, a bank guarantee from a first-class bank, typically a London or Singapore branch of a major commercial bank, in a form acceptable to the claimant. Third, and most commonly, a P&I Club Letter of Undertaking (LOU).
The P&I LOU is a written undertaking from one of the International Group P&I Clubs, on the standard wording of the entered Club, by which the Club undertakes to pay any sum found due to the claimant up to a stated cap, in consideration for release of the vessel from arrest. International Group LOUs are universally accepted in major arrest jurisdictions because the Clubs are well-capitalised, the wording is familiar to admiralty practitioners, and there is a long history of payment without enforcement disputes.
The amount of security is usually negotiated between the parties and should be sufficient to cover the best arguable case on the merits plus interest at a commercial rate for a realistic period to judgment plus costs. Most courts will increase security if the claimant can show good arguable case for a higher sum, and will reduce security if the original amount was excessive.
Sister Ship and Associated Ship Arrest
The sister ship rule under Article 3 of the 1952 Arrest Convention permits arrest of any vessel owned by the same person as the offending ship at the time the claim arose. This is critical because shipowners commonly operate fleets through single-ship companies, each ship in a separate corporate vehicle, so that the offending vessel may have been sold or scrapped by the time the claim is pursued.
The sister ship rule pierces this corporate structure for arrest purposes, but only to the limited extent of allowing arrest of another vessel in the same registered ownership. It does not allow arrest of a vessel owned by a different but related company.
South Africa pioneered the broader concept of “associated ship” arrest under section 3(7) of the Admiralty Jurisdiction Regulation Act 1983, which allows arrest of any vessel owned or controlled by a company that is itself owned or controlled by the same person who owns or controls the company that owns the offending ship. This is significantly broader than sister ship arrest and is one reason South Africa has remained an attractive arrest jurisdiction despite logistical challenges.
The associated ship doctrine has been considered but not adopted in England, Singapore, and most Commonwealth jurisdictions, which continue to require strict identity of registered ownership.
Wrongful Arrest
The risk of wrongful arrest is one of the most significant constraints on the arrest power. An arrest that turns out to have been unjustified can cause very large losses to the shipowner: lost hire, missed charter opportunities, demurrage exposure, port costs, and reputational damage. The question is whether and on what basis the shipowner can recover.
In England, the test for wrongful arrest set in The Evangelismos (1858) is exceptionally high: damages are recoverable only if the arrest was made with malice (mala fides) or with such gross negligence as to be equivalent to malice. Mere mistake or even unreasonable belief is insufficient. This strict test reflects the policy that arrest is a useful commercial tool that should not be discouraged by liberal damages awards.
Civil law jurisdictions tend to apply lower thresholds. Many require only that the underlying claim ultimately fail, regardless of good faith, and some require the claimant to provide counter-security at the time of arrest as a condition for the arrest order. The Netherlands and Belgium are notable for relatively shipowner-friendly counter-security regimes.
The 1999 Arrest Convention takes a middle path, allowing wrongful arrest damages where the arrest was unjustified or excessive or where excessive security was demanded, subject to national law on the standard of fault. This is one reason for its limited adoption: claimants are reluctant to expose themselves to broader wrongful arrest liability.
Recent Significant Cases
The OW Bunker collapse of November 2014 generated extensive litigation on bunker supplier liens. In the US, courts grappled with whether physical suppliers (who delivered the bunkers) or contractual suppliers (who had the contract with the charterer) held the maritime lien. The resolution generally favoured the contractual supplier with the in rem right, but in many cases the physical supplier remained unpaid because the contractual supplier’s liquidator had no funds.
The Stolt Tankers/Hanjin Shipping insolvency of 2016 saw widespread arrests of Hanjin vessels worldwide as containers and cargo were stranded. The case illustrated the limits of the arrest remedy where insolvency proceedings in the home jurisdiction (South Korea) granted moratoriums that other admiralty courts had to weigh against their own arrest powers.
The Bunga Melati Dua/FIMBank line of cases in Singapore and Malaysia clarified the use of letters of undertaking and the relationship between arrest in one jurisdiction and substantive proceedings in another.
The Tasman Spirit (Pakistan, 2003) and the more recent X-Press Pearl (Sri Lanka, 2021) cases illustrated the use of arrest powers and pollution claims under the framework of Article 14 of the Salvage Convention 1989 and SCOPIC, intersecting with environmental liability under MARPOL.
The 2021 Ever Given grounding in the Suez Canal led to her detention by Egyptian authorities and a complex negotiation between the Suez Canal Authority, the owners (Shoei Kisen), the H&M underwriters, and the cargo interests. The case was technically a detention rather than a court arrest but illustrated the practical equivalents of arrest in jurisdictions that act through state authorities rather than judicial process.
Related Wiki Articles
- Voyage Charter Party
- Time Charter Party
- Bareboat Charter Party
- Bill of Lading
- Force Majeure in Shipping
- Off-Hire and Performance Claims
- Classification Society
- Flag State and Flag of Convenience
- Port State Control
- MLC 2006
- Towage and Salvage Operations
References
- International Convention Relating to the Arrest of Sea-going Ships, Brussels, 10 May 1952
- International Convention on Arrest of Ships, Geneva, 12 March 1999
- International Convention on Salvage, London, 28 April 1989
- International Convention on Maritime Liens and Mortgages, Geneva, 1993
- Lloyd’s Open Form (LOF 2020) and SCOPIC 2014 Clause
- Maritime Labour Convention 2006 (MLC 2006), as amended
- Senior Courts Act 1981 (UK), sections 20-21, and CPR Practice Direction 61
- Commercial Instruments and Maritime Liens Act, 46 USC sections 31301 onwards (US)
- Federal Rules of Civil Procedure, Supplemental Admiralty Rules B and C (US)
- High Court (Admiralty Jurisdiction) Act 1961 (Singapore)
- Admiralty Jurisdiction Regulation Act 1983 (South Africa), section 3
- The Evangelismos (1858) 12 Moo PC 352
- The Halcyon Isle [1981] AC 221 (PC)
- The Bunga Melati Dua [2012] 4 SLR 546 (Singapore CA)
- IMO Resolution A.1119(30) on Procedures for Port State Control
- International Group of P&I Clubs standard LOU wordings