Tank test means model towing tests, model self-propulsion tests and model propeller open water tests. Numerical calculations may be accepted as equivalent to model propeller open water tests or used to complement the tank tests conducted (e.g. to evaluate the effect of additional hull features such as fins, etc., on ship’s performance), with approval of the verifier.
Source: Resolution MEPC.214(63), 2012 Guidelines on survey and certification of the Energy Efficiency Design Index (EEDI), 2 March 2012, International Maritime Organization. Regulatory Guidance