NorthStar 941X Reference Manual page 144

ETA: Estimated Time of Arrival at the next waypoint, as calculated by ETA ETA ETA
the 941X according to your present speed of advance (SOA) and
distance to the waypoint.
ETE ETE: Estimated Time Enroute to the next waypoint, as calculated by the
ETE ETE
941X according to your present speed of advance (SOA) and dis-
tance to the waypoint.
GPS GPS: Global Positioning System. A navigation system using signals from GPS GPS
earth-orbiting satellites. The system is capable of providing high
accuracy under all weather conditions.
great circle: Shortest possible path between two points on the surface of great circle great circle great circle
a sphere.
GRI GRI GRI: Group Repetition Interval. The characteristic identifying period of GRI
signals emitted by each loran transmitting chain. The identifier
9960 (Northeast US) indicates that the gap between the start of
any two adjacent master signals is 99,600 microseconds long.
interference interference: The electromagnetic interruption of a radio signal causing interference interference
poor signal reception. Interference may originate from external
sources (such as other radio transmitters) or from the vessel itself
(such as alternator noise or precipitation static).
latitude latitude: Imaginary lines on the earth's surface running East/West and latitude latitude
expressed in degrees (0-90) north or south of the Equator. Used
in conjunction with the North/South lines of longitude to deter-
mine position.
leg leg leg leg: The path between adjacent waypoints of a route.
longitude longitude longitude: Imaginary lines on the Earth's surface running North/South longitude
and expressed in degrees (0-180) east or west of the Prime Me-
ridian (a line running from the North to South Pole, passing
through Greenwich, England).
Loran-C Loran-C Loran-C: Acronym for LOng RAnge Navigation. System of land-based Loran-C
radio transmitters emitting precisely-timed pulses which are re-
ceived and translated into position "fixes."
magnetic variation magnetic variation: The difference between magnetic North and true
magnetic variation magnetic variation
North. Since the difference varies according to geographic loca-
tion, the Northstar 941X automatically calculates magnetic varia
Page 136 Glossary Glossary
Glossary Glossary
Rev. D