Metal through Water

Ashby
cash be thin and waining
but I'll take the long train
anyway, under the bay
under the water
surrounds me on all sides
but I don't see it
and I don't feel it
but I know it's there.
Strange to me how we can
move like this,
wondrous how we've
built like this,
funny to me
how common it is
to move metal through water.