iXBlue GAPS - Page 211

GAPS - User Guide
I.14 IXSEA USBL INS 1
Byte
number
Field Bits Definition
Value
LSB Min Max
1 GG
hex
8 header 55
hex
2
Bits 2 to 0 3 Message number 001
bin
Bits 7 to 3 5 Transponder ID NA 0 31
3, 4, 5, 6 LLLLLLLLhex 32
Latitude (deg)
(Two-complement coded)
180/2
32
-90° 90x(1-2
32
)°
7, 8, 9, 10 NNNNNNNNhex 32 Longitude (deg) 360/2
32
0° 360.(1-2
32
)°
11, 12
13
ZZZZZhex
(8+8+4 bits:
- byte11,
- byte12,
- bits 3 to 0 of 13)
20 Z(m), immersion 0.01 m
0 m
(0000
hex
)
+10485,75 m
(FFFFF
hex
)
Bit 4 1 Reserved
Bits 7 to 5 3
Major axe XY: long axe (in m) of the error ellipse representing the
standard deviation on the position in the XY plane
000: 0 m < standard deviation < 0,5 m
001: 0,5 m < standard deviation < 1,5 m
010: 1,5 m < standard deviation < 3 m
011: 3 m < standard deviation < 6 m
100: 6 m < standard deviation < 12 m
101: 12 m < standard deviation < 25 m
110: 25 m < standard deviation < 50 m
111: standard deviation > 50 m
MU-GAPS-AN-005-H - November 2019 211