Convert parsec to shackle (Britain 1949)
Selected category: length.
Definition and details for parsec:
Parsec (pc or psc) is a unit of distance used by the astronomers. Parsec is defined as the distance at which a star would appear to shift its position by one arcsecond during the time in which Earth moves one astronomical unit perpendicular to the direction of the star.
Definition and details for shackle (Britain 1949):
In 1949 the Royal Navy redefined shackle as 90 feet or 27.432 meters.