Looking for a Commodore game

[BigErn]

When I was very young, my family had a Commodore, I think it was the 64. I remember playing Ace of Aces and Frogger on it. But there's one game that I just can't remember. It involved either a submarine or a diver. Each level would bring you deeper. Not much to go on, but that's all I can remember. If anyone knows it, thanks in advance!

 

[karokoenig]

Only one I can think of on the top of my head is this one:

 

 

I remember we played it a lot back in the days.