Seems silly to me, if it's a bay, there's silt flowing into it, time itself could pile 10cm of detritus into the deepest parts and make it more shallow.

[–] polotype@lemmy.ml 23 points 9 hours ago* (last edited 28 minutes ago)

That's the whole point. 100 fathoms is really imprecise. But on translation, they didn't bother keeping the significant digit count equal, and since 182.8 m= 100 f , they just left it like that. I mean, it's the only reason he could guess there was a unit change...

[–] Tar_alcaran@sh.itjust.works 9 points 9 hours ago

Or currents might deepen a hole too. Putting silt in one place can cause other places to change too.

And if it were more shallow, shipping would have a big impact too.