For as long as the tide is calm there is nothing to worry about.. The barge or the ship has fair facilities in case of emergency.

I even remember to read a book while the ship is sailing which I can't do if im riding in a jeepney or bus.

One good thing I have to add: You will have an ample time to have a good conversation with other passengers if you really like to specially if you can hear someone who speaks your own native dialect. ;)