姉し妹まい艦かんMeanings1nounsister shipRefers 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: 姉妹船この駆く逐ちく艦かんは、あの艦かんの姉し妹まい艦かんです。This destroyer is a sister ship of that one.