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RMC- Recommended minimum specific GNSS data
$--RMC,hhmmss.ss,A,llll.ll,a,yyyyy .yyy,a,x.x,x.x,xxxxxx,x.x,a,a,a*hh<CR><LF>
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+---------------------------------------- 2
+-------------------------------------------- 1
1. UTC of position fix
2. Status (
): A=data valid, V=navigation receiver warning
see Note 3
3. Latitude, N/S
4. Longitude, E/W
5. Speed over ground, knots
6. Course over ground, degrees true
7. Date: dd/mm/yy
8. Magnetic variation, degrees E/W
9. Mode indicator
10. Navigational status
ALF - Alert sentence
$--ALF, x, x, x, hhmmss.ss, a, a, a, aaa, x.x, x.x, x.x, x,c---c*hh <CR><LF>
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+---------------------1
1.
Total number of ALF sentences for this message, 1 to 2
2.
Sentence number, 1 to 2
3.
Sequential message identifier, 0 to 9
4.
Time of last change, see NOTE A
5.
Alert category, A, B or C
6.
Alert priority, E, A, W or C
7. Alert state, A, S, N, O, U or V
8. Manufacturer mnemonic code
9. Alert identifier
10. Alert instance, 1 to 999999
11. Revision counter, 1 to 99
12. Escalation counter, 0 to 9
13. Alert text
NVR-3000 OPERATION MANUAL & INSTALLATION MANUAL
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+---------------------------- 6
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+------+--------------------------- 4
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+------------------------- 11
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+------------------------- 10
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+-------------------------- 9
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+-------------------- 5
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+--+------------------ 8
+-------------------------- 7
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+------------------------ 13
+------------------------ 12
93
NVR-3000 OM.E 20230109-08
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