There are lots of things you can do my only advise is make sure you have it covered not just ladders the whole boat. Look at it 12 diffrent ways then look at it some more. I was running a head boat up north and had a 4 year old go over the side. I saw it happen and so did a deck hand I cut the port engine went hard left and managed to keep him clear of the props. The dechand did exactly as trained he kept is eye on the kid and pointed his location out to me. We had him back in about 4 minutes (un harmed) it felt like 4 days. That was 25 years ago and I still have nightmares be very carefull.

Brian