Yes, many ships still measure their speed in knots rather than miles per hour (mph) or kilometers per hour (km/h). Knot is a unit of speed that represents one nautical mile per hour. It is commonly used in maritime and aviation contexts. Nautical miles are based on the circumference of the Earth and are used for measuring distances at sea.
The use of knots as a unit of speed is deeply ingrained in maritime tradition and is widely understood by sailors and professionals in the shipping industry. It is particularly useful for navigation purposes since nautical charts and instruments often provide information in nautical miles and knots.
While mph and km/h are more commonly used on land and in everyday situations, ships, boats, and other vessels typically continue to use knots as the standard unit for measuring speed.