Goedjn wrote:
..
Pluralization of both with the 's' is correct.

Pluralization of both with the 's' is common.
I suppose whether it's correct depends on
whether there's any meaning for 'correct' beyond
'a lot of people do it that way'.

The American Heritage Dictionary 1992 shows it as fathoms. As with all
things in the English language as with the measurement system, it is open
for debate. :-)

--
Joseph Meehan

Dia duit