<Tr> <Td> 56--63 knots </Td> <Td> 37--52 ft </Td> </Tr> <Tr> <Td> 28.5--32.6 m / s </Td> </Tr> <Tr> <Th> 12 </Th> <Td> Hurricane force </Td> <Td> ≥ 118 km / h </Td> <Td> ≥ 14 m </Td> <Td> The air is filled with foam and spray; sea is completely white with driving spray; visibility very seriously affected </Td> <Td> Devastation . </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> ≥ 73 mph </Td> </Tr>

How many knots is the speed of light