Right now there are no sailors remaining on the deck of the ship and you see at least some civilian sailors being dragged to other craft by the Hippocampi. There might be other sailors remaining out of the fight by staying below decks but it's hard to tell from where you are now.
As for charging them you could do it once but then you and Typho will be in the water.
Also @Darius Vibrtrar did you ever roll damage for the fireball?