INTRODUCTION
20222360 / E 3
The product is type approved as:
• THD (Transmitting Heading Device) using GNSS principle.
BSH type approval no. BSH/4615/4030233/06.
• GPS Receiver Equipment and has a Wheelmark
Be aware that the product can only be certified either as THD or
GPS Receiver Equipment onboard and not both.
1.2 Definitions, Abbreviations and Acronyms
Definitions
Alignment
The process of adjusting the current internal navigation frame
(sensor-frame) in the instrument to the true vessel body frame.
Heading
The direction of the main axis (bow direction) of the vessel.
This is opposed to course, which is the direction of the vessel
motion.
Yaw
A rotation about the vertical axis and is positive when turning
eastward when the vehicle cruises in north direction. Normally
yaw means the dynamic yaw motion.
Abbreviations and Acronyms
CEP
Circular Error Probability
COG
Course Over Ground
DGPS
Differential GPS
ESA
European Space Agency
FAA
Federal Aviation Administration, USA
DU
HS52 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
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