1. % chance of recovering ships from shipwrecks in controlled ports
Influenced by number of turns and gold invested by nation members for recovering ships.
Ship is sold for gold, which is added to nation treasury.

2. chance that nation will get gold when a ship is de-levelled in a controlled port.

Interesting. I like it.

Shipwrecks are not yet that many to consider a feature to "fish" them. It is a good idea for the future although it is in the wrong thread.

Ships currently lose level only in ports. How do you suggest that this law is applied? It sounds too unrealistic. It is like crashing your car and then the state appearing asking for money.

Ship sales % law idea approved with a tweakable option 1 to 10% of the ship value.