<Tr> <Th> Microarcsecond </Th> <Td> 0.001 mas = 6994100000000000000 ♠ 0.000 001 arcsecond </Td> <Td> </Td> <Td> μas </Td> <Td> 6986484813679999999 ♠ 4.848 1368 prad </Td> </Tr> <P> In celestial navigation, seconds of arc are rarely used in calculations, the preference usually being for degrees, minutes and decimals of a minute, for example, written as 42 ° 25.32 ′ or 42 ° 25.322 ′ . This notation has been carried over into marine GPS receivers, which normally display latitude and longitude in the latter format by default . </P> <P> An arcsecond is approximately the angle subtended by a U.S. dime coin (18 mm) at a distance of 4 kilometres (about 2.5 mi). </P> <P> An arcsecond is also the angle subtended by </P>

Value is equal to 1/4 of 1 360