Using the External Computer Data Link MicronNav System
0656-SOM-00001-07 112 © Tritech International Ltd.
‘Raw XYZ’ Nav Data Structure
Data Description DataRange Data Types
Unit ID (0 = Responder, 1..15 =
Transponder, 19=INS)
0 to 19 SHORTCARD
Relative X co-ordinate. Horizontal distance
athwart from reference position (in
millimetres, +ve = towards starboard)
0000000000 to 100000000 LONGINT
Relative Y co-ordinate. Horizontal distance
fore/aft from reference position (in
millimetres, +ve = forwards)
0000000000 to 100000000 LONGINT
Relative Z co-ordinate. Vertical distance
from reference position (in millimetres, +ve
is downwards)
0000000000 to 100000000 LONGINT
Quality Flag / RMS Error. Larger values
indicate better quality.
0.0 to 3.0 REAL
Valid Reply Set
Bit 0 = 1 = Tx Transducer Ok
Bit 1 = 1 = Rx 1 Transducer Reply Ok
Bit 2 = 1 = Rx 2 Transducer Reply Ok
Bit 3 = 1 = Rx 3 Transducer Reply Ok
Bit 4 = 1 = Rx 4 Transducer Reply Ok
E.G. Valid reply = Bits 1 to 4 set to 1 =
“30” (or "31")
000 to 031 SHORTCARD
Time of data, local time = hhmmssdd 00000000 to 23595999 hhmmssdd
Example:
Unit ID = 0 (Responder), Relative X co-ord of -18.686m, Relative Y co-ord of 4.764m, Relative Z co-
ord of 4.1m, Quality Flag = 0.8, Valid reply Set = 30 (all valid), Fix taken at 15:31:56.
ASCII Text = “%D0049082001000-0000018686+0000004764+0000004100+0.80000E
+0003015315632<CR><LF>”
CSV =“%D0033082031,0,-18686,+4764,+4100,0.8,30,15315632<CR><LF>”
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