I was recently wandering if there could be a new way for docking submarines more easily. If a submarine had a tower-like docking hatch room outpost would generate with a hole allowing the tower to fit into it proportionally to it's deepness. This would generate as long as submarine's docking hatch would be the heighest point of the submarine (ignoring walls on the same level as it which are touching the docking hatch). Here's an image (made in Microsoft Office's Spreadsheet Program):