mingi laevaga sama projekti järgi ehitatud laev. Laevade ehitamine suuremate või väiksemate seeriatena sama projekti järgi on nüüdisajal laialt levinud (tuntuim seeria „Liberty“).
ship built to same design and dimensions as another
The Administration of the flag State may allow the inclining test of an individual ship to be dispensed with provided basic stability data are available from the inclining test of a sister ship and it is shown to the satisfaction of the Administration of the flag State that reliable stability information for the exempted ship can be obtained from such basic data.