I have also thought about having audio cues in this. Like for example when your guns are all reloaded you are told "All guns loaded and ready to go Sir!"
Or when youve hit 30% water/leaks there will be some sort of "Theres an awfully lot of water coming in Sir" or "Where taking in too much water Cap'n!"
I imagine the voice being this guy: https://www.youtube.com/watch?v=Y9S1iK3HnGo#t=235
More audio cues could be made for various situations. (Lost a canon, too close to enemy ship, low on ammo etc)
It would make sailing the open world a much more fun experience and you would feel more attached to your ship and crew aswell.