cockboat
/ˈkɒkbəʊt/noun
- a small boat towed behind a larger vessel, especially along a coast or river（尤指沿海或沿河）大船后拖曳的小船。
词源
late Middle English: from obsolete cock 'small boat' （from Old French coque, based on Latin caudex, codex 'block of wood'） +BOAT.