1) Polynesian boat 
[sailing] The vaka is the main hull of a multihull vessel. ==Origin and use of the term== The term vaka comes from the pronunciation of the word waka and is derived from Polynesian, Malay and Micronesian languages for a `canoe`, `ship` or `boat.` Other parts of a traditional vaka can include the aka and ama (outrigger). A proa consists of a...