Is this the Rasco jet-ski? I watched James Bond last night - you know the one where he drives the lotus under water - this would have fitted in well with the aqua mobiles in that movie. Is/was this part of your student studies?
A boat for skiers and divers? Perhaps a ferry/landing craft - would have to have a waterjet to back up with. I's very nice what ever it's function is. Perhps it's just supposed to look cool - and it is.
Nice design, but I see that the side windows around the passenger zone are twisted inwards. And since the handrails are protruding inwards too, that choice will steal a lots of useful space.
I draw this one 15 years ago and when i saw it i find it's not old design , and you what you think ???