The boat has a few things regarding energy. 1. You can build solar panel, nuclear reactor (if it comes to sn2), bioreactor, EG. 2. You can use power cells, without modules it’s a max of 4 but this can be increased to 8 with a module called “extra power storage.” Movement wise it has electric thrusters but also can be equipped with a sail module. Regarding size it has a base module which is essential just a platform the size of a foundation with a small room under it for power. The first upgrade adds the ability to add modules and make it the size of like 4 foundations as well as adding 1.5 rooms worth of space to the underdeck. The third and final upgrade makes it so there are 8 foundations worth and 4 rooms of space in the underdeck. Here are some module ideas I had for it. Trident dock (or maybe just like 4 tadpole docks like the trident) built in dive elevator. Improved scanner station (like a scanner station with increased range) Resouce laser (a laser that tractor beams up resources) decoy tube (launches creature decoys, which could be added also) if you have any module ideas put them in the comments! It would have 8 module slots.
An extra idea I got. Vehicles docked in it will have the ability to send resources to the main boat.
this would be cool