Great Captain

 
Prerequisite(s): Leadership, Knowledge (geography) 7+ ranks, Profession (sailor) 7+ ranks.
 
Benefit: If you are in command of a vessel, you can use the aid another action to assist all other persons on board who are performing the same action in the current round--for example, making an attack, making Profession (siege engineer) checks, making Profession (sailor) checks, and so forth. Commanding the vessel in combat is a move action for you.
 
Source: Stormwrack