MD69BRX
10
6 APPLICATION
The MD69BRX displays True or Magnetic Heading Data transmitted from NMEA 0183 (IEC
61162-1) compatible marine equipment (Gyro-Compass, TMC, GPS Compass etc.)
6.1 Data Sentences
The following NMEA 0183 sentences (in priority order) may be used to display Heading:
•
THS: ( $--THS, x.x, S*hh<CR><LF> ) Heading True with Status
(S = Status = “A”)
•
HDT: ( $--HDT, x.x, T*hh<CR><LF> ) Heading True
(True Heading Data)
•
HDG: ( $--HDG, x.x, x.x, a, x.x, a*hh<CR><LF> ) Heading True (from Magnetic)
(Heading Data corrected for the Earth’s Magnetic Variation and the vessel’s Deviation)
•
HDG: ( $--HDG, x.x,,,,*hh<CR><LF> ) Heading Magnetic
(Heading Data not corrected for the Earth’s Magnetic Variation and the vessel’s Deviation)
•
HDM: ( $--HDM, x.x, M*hh<CR><LF> ) Heading Magnetic
(Heading Data not corrected for the Earth’s Magnetic Variation or the vessel’s Deviation)
7 SPECIAL FEATURES
•
Dual Scale dial type display of Heading, readable to < 0.1°
•
Designed for taking Terrestrial or Celestial Bearings (with Azimuth Sight)
•
NMEA 0183 input with Automatic Baud Rate selection
•
Automatic Prioritisation of Heading type:
o
THS / HDT (True)
o
HDG (Ma Variation),
o
HDG (Magnetic, No Variation),
o
HDM (Magnetic)
•
Automatic Switching to lower priority Heading Type (if available) on loss of data
•
User indication of loss of all valid Heading Data
•
Local and/or Remote dimming control