They may have beached themselves but not sunk. Also sometimes you see this when the map resolution isn't matching where the game thinks the unit is and you see a ship apparently on land but is actually in water. You see this around ports a lot.
"Some ships are designed to sink… others require our assistance." "We shall never forget that it was our submarines that held the lines against the enemy while our fleets replaced losses and repaired wounds." Fleet Admiral Chester Nimitz, USN.
go check silent hunter files, one of the POTD's I posted has a ship on top of a lighthouse
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