NorthStar 941X Reference Manual page 145

tion and uses it to display bearings as magnetic north. The varia-
tion at any location changes slowly over a period of years, and the
941X compensates, according to the current calendar year.
master: The one loran transmitter in a "chain" of at least three stations master
master master
which initiates the series of coded pulses emulated by the secon-
daries.
precipitation static: Also known as "P-Static." Precipitation-induced precipitation static precipitation static precipitation static
electrical charge which can build up on antenna surfaces, result-
ing in poor radio reception.
readout: The panel of graphic images and alphanumeric characters used readout readout readout
by the 941X to display navigation data.
SNR: Signal to Noise Ratio. Guide number for determining the relative SNR SNR SNR
quality of GPS, DGPS, or loran signals as compared to back-
ground radio "noise."
TD TD: Time Difference. The measured amount of time—in millionths of a
TD TD
second—between loran signals received from the master and the
secondary stations.
track track track: A desired line of travel. track
waypoint waypoint waypoint waypoint: A particular location (defined for navigation purposes by its
lat/lon, distance and bearing, or TDs), used as an intermediate or
final destination.
Rev. D Glossary Glossary
Glossary Glossary
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