Convert light second to shackle (Britain 1949)
Selected category: length.
Definition and details for light second:
Light second is defined as the distance the light travels in one second through a vacuum. The defined light speed is c = 299,792,458 m/sec. So one light second equals exactly 299,792,458 meters.
Definition and details for shackle (Britain 1949):
In 1949 the Royal Navy redefined shackle as 90 feet or 27.432 meters.