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?How is sound used to reduce vessel strikes?Ocean Sound PoliciesIcebreakerHow does shipping affect ocean sound levels?Acoustic Rain Gauge (ARG)Autonomous Underwater VehiclesOcean Noise Variability and Noise Budgets Chris Knowlton2017-02-26T20:10:08-05:00