International Organization for Standardization

Ships and marine technology  - Guidelines for the assessment of speed and power performance by analysis of speed trial data - Second Edition
 N 15016

Annotation

The primary purpose of speed and power trials is to determine a ship's performance in terms of ship's speed, power and propeller shaft speed under prescribed ship's conditions and thereby verify the satisfactory attainment of a ship's speed stipulated by EEDI regulations and/or contract.

This International Standard defines and specifies the following procedures to be applied in the preparation, execution, analysis and reporting of speed trials for ships, with reference to the effects which may have an influence upon the speed, power and propeller shaft speed relationship:

— the responsibility of each party involved,

— the trial preparations,

— the ship's condition,

— the limiting weather and sea conditions,

— the trial procedure,

— the execution of the trial,

— the measurements required,

— the data acquisition and recording,

— the procedures for the evaluation and correction,

— the processing of the results.

The contracted ship's speed and the ship's speed for EEDI are determined for stipulated conditions and at specific draughts (contract draught and/or EEDI draught). For EEDI, the environmental conditions are: no wind, no waves, no current and deep water of 15°C.