Trinca el coy!
Coy a la batayola!
Here's his translation/pronunciation guide:
Alza arriba! - AL-sa a-RRI-bha (literally loft upwards)
[RR meaning hard R like Rabbit]
Trinca el coy! - TRIN-ca El COy (tie up your hammock, which is otherwise known as "hamaca". "Trincar" in general parlance means to bind up or corner in)
[R meaning soft R like train]
Coy a la batayola! - COy A LAH BAH-tah-yoeh-lah (Put the hammock away on the batayola which I think means bulkhead stringer, some sort of shelf structure along the hull or bulkhead)