Simrad HS52 GPS compass and DGPS navigator
4 20222360 / E
PDOP
Positional Dilution Of Precision. A three dimensional geometry
only, dependent on accuracy figure.
1PPS
One Pulse Per Second
PSXN20
A proprietary NMEA message including position, height and
heading quality information
PU
HS52 Processing Unit
RFI
Radio Frequency Interference
RF
Radio Frequency
RMS
Root Mean Square
ROT
Rate of Turn
RRE
Range Residual Error, a specific Ashtech format
RTCM
Radio Technical Commission of Maritime Services
SBAS
Satellite Based Augmentation System
SOG
Speed over Ground
SS
Signal Strength
SSB
Single Side Band
UTC
Universal Time Co-ordinate. This is the official time in the
world and has replaced GMT (Greenwich Mean Time) as the
official time
VDOP
Vertical Dilution Of Precision
VHF
Very High Frequency
WER
World Error Rate
WGS-84
World Geodetic System of 1984