Japan Radio Co. JLR-7900, Инструкция по эксплуатации

Страница: 10 / 184

viii
difference. (The method is for operators who have a background in
loran navigation.)
Master reset This function changes the settings of the display unit and GPS
sensor back to the factory settings. The function clears all the
data.
Multipath Wave Waves received from multiple directions due to reflection or
refraction of an initial wave by obstacles.
NMEA0183 (NMEA) Abbreviation of National Marine Electrical Association 0183.
International standard for naval equipment transmission
established by the National Marine Electrical Association.
Positioning Use of GPS or DGPS receiving functions to determine the current
position of a ship.
RAIM Accuracy Standard
(RAIM)
Abbreviation of Receiver Autonomous Integrity Monitoring. This
system automatically detects failed satellites and deselects their
positioning data from calculations. Including data from failed
satellites will result in a decrease in positioning accuracy; the RAIM
accuracy standard indicates the accuracy degradation base for
removal of failed satellites from positioning calculations.
Ranging Positioning with the use of SBAS satellite in addition to GPS
satellite.
Reception Level GPS signal reception level.
Route plan Plan registered with multiple waypoints in the navigation order
RS-422 Balanced serial transmission standard.
RS-485 Balanced serial transmission standard.
SBAS Abbreviation of Satellite Based Augmentation System. It is a
blanket term for wide scale GPS support systems using fixed
position satellites which send GPS error correction data over a wide
range.
SBAS Search SBAS reception mode (manual / automatic).
Smoothing Function for averaging over a specified number of seconds.
SOG Speed Over Ground, This is the ship’s relative speed to the ground.
SPEED The speed mainly measured by the GPS.
STW Speed Through Water.
Symbol information Information of symbols displayed on the plotting screen. The
information includes symbol positions, comments, etc.
TD Abbreviation of Time Difference. Time difference from the
master-station signal of the loran system to the slave-station signal.
Message Type 0 SBAS satellite test broadcasting.
UTC Abbreviation of Coordinated Universal Time.
XTD alert This alert informs that the own ship has got out of the scheduled
route by the preset distance or more.