So my buddy and I are trying to build a cave to dock our ship(1st screenshot) but finding it hard to get the water to properly fill the cave. When we pull the ship in, it doesn't float in the water but above it (2nd screenshot). We noticed there is like little "air bubbles" under water in areas left over from shovel,pickaxe, and mining gun work that seem to block water from coming in. We found the best way to get ride of those was blowing up powder kegs...