boat cloak

Noun

 * 1) A large cloak worn at sea, especially a navy blue cloak worn as part of formal naval dress.
 * 2) * 1808–10,, Memoirs of a Georgian Rake, Folio Society 1995, p. 90:
 * Captain Waddell threw aside a large boat cloak which he had thrown over his own and my shoulders to protect us both from the spray of the sea and intense heat of the sun, and also took off his gloves.