this is my greatest , fastest invention . This submarine can fully submerge , diving and surfacing . It is quite plain because I didn't have time to decorate it , the balancing job took most of my time . You can download it and decorate it how you want , It is a ww2 German U-boat . CONTROL : full throttle at VTOL neutral so surfacing and floating , reduce power to diving , push VTOL sidebar up to move for ward , increase or decrease power to balance and control diving or surfacing , (approximately 40-50% power if you want to submerge, too much , it will surface , too less , it will dive to its death). Remember to keep the periscope (the VTOL engine on the pole ) out of water or else , it will not work and the sub will sink . it a little ugly with the VTOL engine , so just imagine that it is a giant periscpoe :-) I hope you enjoy the sub , and don't mind my ballast system under the ship , it needs it to balance . Give it a vote if you like it and also comment down below :-) Thanks you all for downloading and voting , I'm very appreciate :-)