A lot of things aren't modelled correctly in the game, take the IXD2's range or the fact that the snorkel, when 1m above water is recognised by the game as being as big as a ship. These are just two faults I can think of right now, these as well as a few others can be fixed by mods(infuriating that the mods are simple adjustments that the dev team could have made in a follow-up patch to 1.4b, prolly take a dev. member 5 seconds to correct rather than have the community go through trial and error to find and fix the small problem). I still love the game but only did so after d/ling some definately must-have mods. Hope they take greater care with SHIV