Specifications

57
Table 5.7.13. Buoy information message (MsgID = 5).
Byte HiNibble LoNibble
0 MsgID = 5 = 0101 CRC-4 checksum
1
2
3
GPS Latitude
4
5
6
GPS Longitude
7 Battery Status
8 A
v
A
x
9 A
y
(Reserved)
5.7.2.6 Meteorological parameters (MsgID = 6)
Table 5.7.14 explains the "Meteorological parameters" message. The water temperature T
w
is a
10-bit number, scaled linearly: T
w
= i/20 −5 in units of °C.
Table 5.7.14. Meteorological parameters message (MsgID = 6).
Byte HiNibble LoNibble
0 MsgID = 6 = 0110 CRC-4 checksum
1
T
w
2
T
w
(continued)
(Reserved)
3 (Reserved)
… …
9 (Reserved)
5.7.2.7 Compressed directional spectrum (MsgID = 9)
Table 5.7.15 explains the "Compressed directional spectrum" message.
Table 5.7.15. Compressed directional spectrum message (MsgID = 9).
Byte HiNibble LoNibble
0 MsgID = 9 = 1001 CRC-4 checksum
1
Dir(peak)
2
Spr(peak)
3 k
max
4 Dir
0
5 Dir
1
-Dir
0
Spr
1
6 Dir
2
7 Dir
3
-Dir
2
Spr
3
… …
28 Dir
24
29 Dir
25
-Dir
24
Spr
25
30 Dir
26
Here, Dir and Spr are the mean direction and directional spread. At the top of the table, the
direction and spread for the peak in the heave spectrum are given. The peak is defined by k
max
in
the 3
rd
row. In the remaining rows, the directional spectrum is specified for the same set of