Matthew Poole and continuators on Psalms 107:23

23. They that go down to the sea in ships, that do business in great waters:

He saith, go down, either because the Sea or the shore of it is commonly lower than their habitations from whence they come, or than the natural or artificial banks which are raised to prevent the inundation of the waters: or because the Sea is lower than the earth, as may be gathered from the rivers which run down into it.

Whose occupation lies there, either as Merchants, or as Mariners.