Appendix 3-2
Log Pulse Contact output signal, output in 1 pulse per nm.
Expressed in units of "p/nm".
mi/h Unit of ship speed.
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.
NSK JRC radar supported format.
Pitch Medial rotation
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.
Rate of Turn Same as ROT
Reception Level GPS signal reception level.
Roll Lateral rotation
ROT Rate of Turn, the rate at which the ship turns, expressed by
"deg/min".
RS232 Serial data transmission standard. It is unbalanced, and hence can
only be used for short distance transmission.
RS422 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.
STW Speed Through Water.
Type 0 Information SBAS satellite test broadcast.
UTC Abbreviation of Universal Time Coordinated. Successor to
Greenwich Standard Time.
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