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Nautical Units Converter
This calculator converts various nautical measurement units. It includes conversions for speed and distance units. For speed, it can convert knots to miles per hour, kilometers per hour, feet per second or meters per second. For distance, it can convert nautical miles to miles, kilometers, cables, leagues, meters or feet.
Popham Telegraph Code
The calculator can convert English phrase to sequence of Popham Telegraph codes. It also can be use to decode a message encoded in Popham code.
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