That's okay as long as you have naval supremacy, since your defeated men can always just retreat right back into the waiting ships. You don't even need to try andy real encirclements anyway, as any action behind the lines will be a sufficient distraction.
SU never has naval superiority against Germany.
All you will have is a tiny distraction at the cost of units, that and your navy is liable to be wiped from the face of the earth.