Refers to the behaviour of a ship under the influence of wind and current; both deflect the ship from its intended course. 'Set' is the direction of that deflection, and 'drift' is the speed in knots of the displacement.
Kubhekiselele kwindlela esebenza ngayo inqanawe phantsi kwempembelelo yomoya nomsinga; zombini ezi zinto ziya yiphazamisa inqanawe kumsebenzi wayo. "Isenzo" ngumgaqo ohanjwa yinqanawe ngenxa yolo phazamiseko, kwaye "uphambukiso" ngumlinganiselo wesantya senqanawe esibangwa lolu shenxiso.