NVR-3000 OPERATION MANUAL & INSTALLATION MANUAL
NVR-3000 OM.E 20210412-02
93
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>
| | | | | | | | | | |
| |
| | | | | | | | | | |
| +-----------------------10
| | | | | | | | | | |
+-------------------- 9
| | | | | | | | | +--+------------------ 8
| | | | | | | | +-------------------------- 7
| | | | | | | +---------------------------- 6
| | | | | | +---------------------------- 5
| | | | +------+--------------------------- 4
| | +--+----------------------------------- 3
| +---------------------------------------- 2
+-------------------------------------------- 1
1. UTC of position fix
2. Status (
see Note 3
): A=data valid, V=navigation receiver warning
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(
see Note 1
)
9. Mode indicator (
see Notes 2 and 3
)
10. Navigational status (see Note 4)
NOTE 1:
E = Easterly variation subtracts from True course
W = Westerly variation adds to True course
NOTE 2: Positioning system mode Indicator
A = Autonomous. Satellite system used in non-differential mode in position fix;
D = Differential. Satellite system used in differential mode in position fix;
E = Estimated (dead reckoning) mode;
F = Float RTK. Satellite system used in real time kinematic mode with floating integers;
M = Manual input mode;
N = No fix. Satellite system not used in position fix, or fix not valid;
P = Precise. Satellite system used in precision mode. Precision mode is defined as: no deliberate
degradation (such as selective availability) and higher resolution code (P-code) is used to compute
position fix. P is also used for satellite system used in multi-frequency, SBAS or Precise Point
Positioning (PPP) mode;
R = Real time kinematic. Satellite system used in RTK mode with fixed integers;
S = Simulator mode.
NOTE 3:
The positioning system mode indicator field supplements the positioning system status field. The status
field should be set to V = Invalid for all values of the mode indicator except for A= Autonomous, D =
Differential, F = Float RTK, P = Precise and R = Real time kinematic. The positioning system mode
indicator and status fields should not be null fields.
NOTE 4:
The navigational status indicator is according to IEC 61108 requirements on ‘Navigational (or Failure)
warnings and status indications’. This field should not be a NULL field and the character should take
one of the following values:
S = Safe. when the estimated positioning accuracy (95 % confidence) is within the selected accuracy
level corresponding to the actual navigation mode, and/or integrity is available and within the
requirements for the actual navigation mode, and/or a new valid position has been calculated
within 1 s for a conventional craft and 0,5 s for a high speed craft.
C =
Caution when integrity is not available.
U= Unsafe when the estimated positioning accuracy (95 % confidence) is less than the selected
accuracy level corresponding to the actual navigation mode, and/or integrity is available but
exceeds the requirements for the actual navigation mode, and/or a new valid position has not been
calculated within 1 s for a conventional craft and 0,5 s for a high speed craft.
V =
Navigational status not valid, equipment is not providing navigational status indication.
Summary of Contents for NVR-3000
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