In nautical terms ... sailing and flying ... a "knot" is a unit of speed. 1 knot = 1 nautical mile per hour = 1.152 statute ("regular") miles per hour
1.1508 mi/hr Algebraic Steps / Dimensional Analysis 1 knots*1 mi/hr 0.8689762419 knots=1.150779448 mi/hr
900 knots is about 1,035.7 mph
1 knot = 1.152 mph = 1.85 kph