Thus , speed over the ground -LRB- SOG -RRB- -LRB- ground speed -LRB- GS -RRB- in aircraft -RRB- and rate of progress towards a distant point -LRB- ` velocity made good ' , VMG -RRB- are also given in knots .

Knots are then also used to describe the actual speed of a vessel over the ground -LRB- SOG -RRB- and for its rate of progress toward a distant point -LRB- ` velocity made good ' or VMG -RRB- .
