grapnel

(←) n general term for fish net, grapnel dragged along the bottom.

They slept fairly and, at daybreak, got up the grapnel and hoisted the sail again.

Or, by the accidental use of a grapnel, they would chance to fish up some bottles of valuable "bay-oil" from the bottom.

I found landing impracticable and therefore came to a grapnel, in hopes of their coming to us, for we had passed several fires.

Our grapnel was foul but Providence here assisted us; the fluke broke and we got to our oars and pulled to sea.