ISO 15016:2025 船舶および海洋技術 — 速度試験データの分析による速度と出力性能の評価のための仕様 | ページ 6

3.1

brake power

power, in watts, delivered by the output coupling of the propulsion machinery before passing through any speed-reducing and transmission devices

3.2

contract power

brake power (3.1) or shaft power (3.20) , in watts, that is stipulated in the new build or conversion contract between the shipbuilder (3.21) and the owner (3.14)

3.3

contract speed

ship speed (3.23) to be achieved as agreed within the terms of the new build/conversion contract

3.4

direct power method

procedure where the measured power is directly corrected by the power increase due to added resistance in the trial conditions

3.5

double run

two consecutive speed runs (3.27) at the same power setting (3.16) on reciprocal headings (3.8)

3.6

Energy Efficiency Design Index power

EEDI power

brake power (3.1) , in watts, that is stipulated by the Energy Efficiency Design Index (EEDI) regulations

3.7

Energy Efficiency Design Index speed

EEDI speed

ship speed (3.23) achieved under the conditions specified by the IMO Resolution MEPC.245(66) (as amended)

3.8

heading

compass direction (based on true North) in which the vessel’s bow is pointed, measured over the centreline of the vessel

3.9

headway distance

length travelled during the speed run (3.27) in the direction of the compass heading (3.8) (based on true North)

3.10

ideal conditions

trial situation without wind, without waves, without current, in deep water, with a water temperature of 15 °C, a specific water density of 1 026,0 kg/m³, an air temperature of 15 °C and an air specific density of 1,225 kg/m³ (unless specified otherwise in the shipbuilding contract)

3.11

load variation test

procedure conducted during tank-testing to find out the variation of performance (in terms of efficiency, revolutions, torque and thrust) according to the variation of load on the ship resistance

3.12

maximum continuous rating

maximum power output that the prime mover(s) can produce while running continuously at safe limits and conditions as specified on the nameplate and in the technical file of the prime mover(s)

Note 1 to entry: In case a prime mover power limitation (EPL) or a shaft power limitation (Shapoli) system is installed, the limited installed power is as specified in the Energy Efficiency Existing Ship Index (EEXI) Technical File.

3.13

measured ship speed

vessel velocity during a speed run (3.27) derived from the headway distance (3.9) between the start and end position and the elapsed time of the speed run (3.27)

3.14

owner

party that signed the new building or conversion contract with the shipbuilder (3.21)

3.15

owner’s master

person in command after delivery of the vessel

3.16

power setting

selection of the throttle of the prime mover(s) and the propeller shaft speed and, in case of controllable pitch propellers (CPP), the selection of the pitch angle (3.19)

3.17

propeller

driving screw propulsor or alternative propulsion system of the ship

3.18

propeller pitch

design pitch at 0,7 R for a fixed pitch propeller

3.19

pitch angle

operating blade angle of a controllable pitch propeller (CPP)

3.20

shaft power

net power, in watts, supplied by the machinery of the prime mover(s) to the propulsion shafting after passing through all speed-reducing and other devices, and after power for all attached auxiliaries has been taken off, and accounting for losses in the shaft between the propeller (3.17) and the location of power measurement at the shaft

3.21

shipbuilder

shipbuilding company that signed the new building or conversion contract with the owner (3.14)

3.22

shipyard

shipbuilding production facility where the subject ship is constructed

3.23

ship speed

forward velocity of the ship that is realised under the stipulated conditions

Note 1 to entry: See also, contract speed (3.3) , Energy Efficiency Design Index speed (3.7) and measured ship speed (3.13) .

3.24

sister ship

ship with identical main dimensions, body lines, appendages and propulsion system built in a series by the same shipyard (3.22)

3.25

S/P trial

speed and power trial

trial to establish the relationship between power and speed for a particular ship

3.26

S/P trial agenda

speed and power trial agenda

document outlining the scope of a particular S/P trial (3.25)

3.27

speed run

track of the ship with specified heading (3.8) , distance and duration for which the measured ship speed (3.13) and shaft power (3.20) of the ship are calculated

3.28

tank test

model basin measurement for the prediction of the speed-power relation for the stipulated conditions

3.29

trial leader

duly authorized person [representative of the shipbuilder (3.21) ] responsible for the execution of all phases of the speed and power (S/P) trials (3.25) including the pre-trial preparation

3.30

trial log

data recorded before, during and after the speed and power (S/P) trial (3.25)

3.31

trial team

team that consists of the trial leader (3.29) , the owner’s representative, the appointed persons responsible for the speed and power trial (S/P) (3.25) measurements and, if the ship requires the Energy Efficiency Design Index, the verifier (3.32)

3.32

verifier

third party responsible for verification of the Energy Efficiency Design Index

3.33

zero pitch

blade angle of a controllable pitch propeller (CPP) at which the propeller generates zero thrust