Installation manual

Glossary
84
U
UTC Coordinated Universal Time. The International Atomic Time (TAI)
with leap seconds added at irregular intervals to compensate for
the Earth’s slowing rotation. Leap seconds are used to allow UTC
to closely track UT1, which is mean solar time at the Royal
Observatory, Greenwich.
V
VHF Very High Frequency
Z
ZDA NMEA sentence, date and time.