After looking over the pics, I'm not sure those are loose/lost tiles. They're symmetrical on both sides of the boat.
I'm speaking of the three black rectangles that look "disorderly" on the boat's bow, forward of the planes. The pierside pic shows them on the starboard side, and the waterside shot shows them on the port side - they're angled and arragned the same way on both sides.
Flood vents, perhaps?
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At Fiddler’s Green, where seamen true
When here they’ve done their duty
The bowl of grog shall still renew
And pledge to love and beauty.
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