HomeCalculatorsClassNK INNOVATION / IE Notation

ClassNK INNOVATION / IE Notation

Nippon Kaiji Kyokai's notation family for innovative energy-efficient and environmental technologies - IE (Innovative Environmental), IEE (Energy Efficient), and specific sub-notations for wind-assist, battery, fuel cell. Growing in uptake on Japanese-flag and LNG-C fleets.

ClassClassNK

IE (Innovative Environmental) baseline

NOx Tier III + SOx ≤ 0.10 %CO₂ ≥ 30 % below EEDI Phase 2 referenceBallast water treatment IMO type-approved

Innovation sub-notations

(WindAssist) - Flettner / kite / wing-sail with CFD validation(Battery) - type-approved Li-ion ESS > 500 kWh(FuelCell) - MSC.485(101)-compliant fuel cell power(OPS) - high-voltage shore connection IEC 80005-1

IE baseline met

3/3

Sub-notations awarded

2/4

Notation string

IE (Battery, OPS)

Formula, assumptions, and limits

IE notation requires all three baseline items. Sub-notations stack as comma-separated descriptors, e.g. "IE (WindAssist, OPS)". ClassNK's Part H Chapter 16 details the full criteria per sub-notation.