Board Thread:Suggestions forum/@comment-27699761-20160810083413/@comment-27699761-20160811213722

most likely the corsairs don't have any ships left, it was somewhere stated that just before or right after  Aragorn went to Umbar with a small fleet, and destroyed the Umbarian fleet and killed the head of the city, won't see them anytime soon. They just had 50 large ships at the time of WotR and that is 17 years after the start of the game.