Get onboard a vessel entering an Atlantean Outpost. Such voyages will appear on the notice board. Note that some puzzling skill is required by most captains, as well as a bravery badge on Doubloon oceans or an active subscription to the game on Subscription oceans.
When a ship sinks in Atlantis, it is permanent and the vessel is gone forever. This is undesired because ships are expensive and sinking ends the Atlantis run without any loot. However ships will eventually sink on enough Atlantis runs.
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You may get a random event on Voyage to go on an expedition for buried treasure. Note: To apply for a Voyage, use the Notice Board. When this happens, you can play forage for treasures. Complete the event to earn "Beach Comber".
Complete at least fifty Battle Navigation battles. Sea battles with a safe zone (for example, Atlantis, CI, Blockade, Flotilla etc.) will not count. Additionally, any sea battle where you disengage also will not count.
Play the Bilging puzzle for approximately 2 hours and 46 minutes (or 10,000 seconds). The time accrues only if you are playing the puzzle. Duty Reports, time in port and pausing will not count. Time also will not count in the Bilger puzzle if remain idle, unlike most other puzzles.