Looking for the name of and old arcdade coin-op video game

Guys, i can't remember a name for a video game i enjoyed when i was a
kid for days and days.

I think this vd is from 1984 to 1988.

Its about some kind of pirate in a town, with a sword and figth with
enemies.

Then when i won, i get into a small boat (just for 4 passengers) and
figth with other enemies (Birds, for example)

Then i get into a bigger ship, like buccanner or something similar and
i fight again

Then i took the pirate ship, i realese the captain.

In the middle when i took power, my sword fight with some kind of
shield


Well, i will apreciate a lot some information (principally the name) of
this game.