GB/T 30007-2022
Ships and marine technology—Guidelines for the assessment of speed and power performance by analysis of speed trial data (English Version)
- Standard No.
- GB/T 30007-2022
- Language
- Chinese, Available in English version
- Release Date
- 2022
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
- Latest
- GB/T 30007-2022
- Replace
- GB/T 30007-2013
- Scope
- The main purpose of the speed and power trial is to determine the performance of the ship in terms of speed, power and rotational speed under the specified conditions, so as to verify whether the ship can reach the speed specified in the EEDI regulations and/or the contract. Considering the relationship between speed, power and propeller speed, this document defines and specifies the following steps in the preparation, implementation, analysis and reporting of ship speed trials: ——responsibilities of all parties; ——sea trial preparation; —— Ship status; --- restricted weather and sea conditions; --- sea trial steps; --- sea trial implementation; --- necessary measurements; --- data collection and recording; --- evaluation and correction steps; --- Result processing. The contract speed and EEDI speed are determined in a specific ship condition and draft (contract draft and/or EEDI draft). For EEDI, the environmental conditions are: no wind, no waves, no current and deep water at 15 °C. It is impossible to fully realize the specified conditions in the actual sea trial, so some environmental conditions have to be considered to be corrected, such as water depth, sea surface wind, waves, currents and ship draft. Therefore, in the speed and power trials, it is necessary to measure not only the shaft power and ship speed, but also ship-related data and environmental conditions. This document applies only to displacement ships. In this document, the unit of angle is radian (rad), and the unit of speed is meter per second (m/s), but degrees (°) can also be used as the unit of angle and knots (kn) as the unit of speed. Therefore, unless otherwise stated, the units of angle and velocity in the calculation formula are radian (rad) and meter per second (m/s). In addition, for the convenience of users of this document, values in degrees and knots are also given where appropriate. If the conditions stipulated in this document cannot be met, the actual operation can be carried out according to the written agreement reached by the shipowner, the verifier and the shipyard.
GB/T 30007-2022 history
- 2022 GB/T 30007-2022 Ships and marine technology—Guidelines for the assessment of speed and power performance by analysis of speed trial data
- 2013 GB/T 30007-2013 Ships and marine technology.Guidelines for the assessment of speed and power performance by analysis of speed trial data
