Ship maneuverability can be signi…cantly a¤ected by the draft and trim condition. The IMO (interim) standards are applied to the full load and even keel conditions. This full load draft is chosen, based on the general understanding that the poorest maneuvering performance (poor course keeping capability) of a ship occurs at this full load condition. When it is impractical to conduct trials at full load because of the ship type (bulk carrier, etc.), draft and trim must be as close as possible to the specified trial condition and/or the condition in which model tests have been carried out. This allow for predicting the full load maneuvering performance, using a reliable correction method (based on model tests or proven computer simulations) that ensures satisfactory extrapolation of trial results as suggested by IMO Resolution A751. In case of any corrections, the procedure used must be clearly referenced and documented.