Sea, fuel, ports and returning

<h2>Sea travel</h2><p>Enter from a coastal pier with an equipped vessel; coordinates persist. Movement consumes fuel and automatically uses canister charges when the tank is low. Fuel is sold under State shop → Transport.</p><p>The sea port returns ships to the coast and unloads pearls. Survivors continue after a sea battle; defeated players respawn by the pier and must return to the coast before sailing again.</p><h2>[navigator-charge-recovery] Navigator charge</h2><p>The navigator consumes charge while travelling routes. Charge recovers automatically at the rate shown in Navigator Nora on the coastal page; recovery is free. Charge is capped at the navigator capacity. If a route needs more charge than you have, wait for recovery and try again.</p>