Simrad SIMRAD HS50 manual Abbreviations and acronyms, Nmea

Simrad HS50 Heading Sensor

	Abbreviations and acronyms
CEP	Circular Error Probability
COG	Course Over Ground
DGPS	Differential GPS
DU	HS50 Display Unit
EPE	Estimated Position Error
GPS	Global Positioning System
GSA	A standard NMEA message including GPS satellite ID
	numbers, PDOP, HDOP and VDOP
HDOP	Horizontal Dilution Of Precision
HGT	GPS Antenna Height above the WGS-84 ellipsoid
IEC	International Electrotechnical Commission
IMO	International Maritime Organization
I/O	Input/Output
NMEA	National Marine Electronics Association. NMEA 0183 is a
	standard for interchange of information between navigation
	equipment
PDOP	Positional Dilution Of Precision. This is the sum of the VDOP
	and HDOP figure
PSXN20	A proprietary NMEA message including position, height and
	heading quality information
PU	HS50 Processing Unit
RFI	Radio Frequency Interference
RF	Radio Frequency
RMS	Root Mean Square
ROT	Rate of Turn
RRE	Range Residual Error, a proprietary format
RTCM	Radio Technical Commission of Maritime Services
SOG	Speed over Ground
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
WGS-84	World Geodetic System of 1984

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