NIght Photography while at sea

My son is in the US Navy. He wants me to figure out which compact camera would allow him to take pictures at night while at sea of the stars, and bio-luminescence. Unfortunately, while he can use a tripod the ship will still be moving. After a lot of research I still don’t know if it is better that he just get a point and shoot that does 4k video? Or is it possible for a novice to still get a fairly good picture? If you have any camera recommendations that would be awesome! Needs to be small enough to stow in tight quarters. Thanks!