For what it's worth, since the latest patch I have been able to get around every naval CTD by doing the following:
  1. Identify the stack that's giving you the crash.
  2. Do not click on it.
  3. End the turn.
  4. Re-try selecting the stack.

In one or two turns this always works for me. I'm also nearing the end of an epic Ottoman campaign, and using this method has saved my bacon twice.