sister ship
Refers to a ship of the same class or design as another, analogous to 'sister ship' in English. Often used in naval or maritime contexts.
See also: 姉妹船
This destroyer is a sister ship of that one.
Compound of 姉妹 (しまい, 'sisters') and 艦 (かん, 'warship'). The term is a direct calque from English 'sister ship'.