The Seeadler is a German raider that has been preying on Allied shipping since it set sail in December disguised a Danish trader. Initially this three-masted sailing ship operated in the Atlantic but since April it has been prowling in the Pacific. The Allies are frustrated by the Seeadler‘s depredations and have sent warships to hunt it down, but to no avail. The Pacific is a big ocean and Luckner, the Seeadler‘s captain is adept at hiding in it.
But the sea has other dangers than enemy warships. After its long time at sea, Luckner brings the Seeadler to the lagoon of Mopelia, an isolated coral atoll, so that essential repairs can be carried out. Then unexpected disaster strikes. The ship is somehow wrecked against the island’s reef, perhaps (as Luckner will report) by a tsunami. The crew and their prisoners are able to escape to the island, carrying provisions and some equipment with them, but now Luckner and his men are marooned.
The wreck of the Seeadler (Naval History Homepage)