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Rev. D Glossary
GlossaryGlossary
Glossary Page 137
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
mastermaster
master: The one loran transmitter in a “chain” of at least three stations
which initiates the series of coded pulses emulated by the secon-
daries.
precipitation static
precipitation staticprecipitation static
precipitation static: Also known as “P-Static.” Precipitation-induced
electrical charge which can build up on antenna surfaces, result-
ing in poor radio reception.
readout
readoutreadout
readout: The panel of graphic images and alphanumeric characters used
by the 941X to display navigation data.
SNR
SNRSNR
SNR: Signal to Noise Ratio. Guide number for determining the relative
quality of GPS, DGPS, or loran signals as compared to back-
ground radio “noise.”
TD
TDTD
TD: Time Difference. The measured amount of time—in millionths of a
second—between loran signals received from the master and the
secondary stations.
track
tracktrack
track: A desired line of travel.
waypoint
waypointwaypoint
waypoint: A particular location (defined for navigation purposes by its
lat/lon, distance and bearing, or TDs), used as an intermediate or
final destination.