Which preposition to use with trawls

at Occurrences 1%

The difficulty of trawling, like that of dredging, rapidly increases with the depth at which the operation is performed; and, until the other day, it is probable that trawling at so great a depth as 100 fathoms was something unheard of.

into Occurrences 1%

She cannot send down her dredges and her trawls into these virgin depths of the great ocean without bringing up a discovery.

near Occurrences 1%

And as I stood looking about me, I remember that some cruising insect trawled near my ear its lonely drone.

Which preposition to use with  trawls