Definitions NUMBER@1 international knot = NUMBER@1 nautical mile per hour -LRB- exactly -RRB- , NUMBER@2 kilometres per hour -LRB- exactly -RRB- , NUMBER@3 meters per second , NUMBER@4 miles per hour -LRB- approximately -RRB- .

Definition NUMBER@1 international knot = NUMBER@1 nautical mile per hour = NUMBER@2 kilometres per hour exactly .
