This is the enhanced version of the standard submarine. It behaves the same way as the standard submarine, except that it releases enhanced float mines, .
These float mines are much more difficult to avoid, because they are larger in size and do not disappear when they reach the surface. The enhanced float mines keep on bobbing at the surface until you destroy them with a depth charge, or collide with them with your boat.
You score between 4,000 and 6,000 points when destroying an enhanced submarine.