knots knotsa unit of speed equal to one nautical mile (1.852 km) per hour, approximately 1.151 mph. Related Articles: Ship Quieting TechnologiesSonar Equation Example: Active SonarHow is sound used to measure rainfall over the ocean?Commercial Vessel TrafficTutorial: Commercial Vessel TrafficHow is sound used to reduce vessel strikes?Ocean Sound PoliciesIcebreakerHow does shipping affect ocean sound levels?Acoustic Rain Gauge (ARG) Chris Knowlton2017-02-26T20:10:08-05:00