Use your batteries to get home
I have been in your situation. What you need to do is run submerged until the batteries are 40-50% and then surface only long enough to recharge. You do that charge at 2/3 speed to conserve fuel.
It is slow, but all the while using batteries is extending your range.
When you are free of likely enemy encounters, you can run the batteries down to 10-20% before refuelling. Also, slow speed underwater to extend battery life.
It is slow but survival is the goal.
|