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Yes the CO can name CIC primary,and the Radarman can get that good fix
off quickly,but a trained QM team can get and plot a visual in easy 10
seconds. I am glad that they got the QM's to CIC training.
I did write about the Intrepid and the in fog grounding.I resonnaly
visit a friend that teaches there. He showed me a radar that tracked
about 11 targets with course, speed and CPA of each.	COMNAVAIRFORINST
3530.4A/
�	COMNAVSURFORINST 3530.4A
24 Feb 05
APPENDIX H
NAVIGATION SYSTEMS/EQUIPMENT
1. Global Positioning System Figure of Merit (FOM) is an integer
representation of position error (3 dimensions, 1 sigma) as shown in
the table below and reflects the following �predictable� errors:
a. Receiver state and navigation mode
b. Availability/accuracy of ionosphere corrections
c. Satellite geometry (Dilution of Precision � DOP)
d. Degradation due to SA exclusion
e. User range accuracy effects
Expected Position Error
Figure of Merit
1Less than or equal to 27.3YDS
2Greater than 27.3 Less than 54.7YDS
3Greater than 54.7 Less than 82YDS
4Greater than 82 Less than 127.3YDS
Greater than 127.3 Less than 218.6YDS
6Greater than 218.6 Less than 546.6YDS
7Greater than 546.6 Less than 1093.3YDS
8Greater than 1093.3 Less than 5466.6YDS
9Greater than 5466.6YDS
Additional errors may be introduced by anomalies in the satellite/
control station and/or hostile actions that result in range error
above the operational tolerance. These errors are different from the
predictable degraded accuracy described above. GPS integrity refers to
the ability of the system to
Provide a timely warning to users when it should not be used for
navigation. However continued use of visual and radar plotting
provides the necessary integrity of the navigation system.


On Dec 4, 9:34�am,  wrote:
> Yes, Master Chief, keep 'em coming. �Not that everything is practical or 
practiced, but this stuff can be excellent learning aids for any mariner.
>
> Now I have a question, regarding COMNAVSURFORINST 3530.4A paragraph 4, which 
relaxes the visual fix interval when using GPS as primary. �Is there a rule 
stating how fast the GPS should be logging or resetting the inertial in 
various waters? �I'm thinking of the modern Voyage Management System (VMS) 
using GPS/inertial as primary. �Civilian aviation has very specific rules as 
to how fast the GPS needs to reset the inertial, and the pilots here can 
chime in as to what their rules are.
>
> My time was paper plots and sound powered phones to the bearing takers. �I 
wonder how many know "primary" plot was in CIC unless inside the sea buoy or 
with a working pilot? �Makes sense when you consider that the ship is fought 
from CIC. �We didn't waste training time on my ships. �QM training included 
the OS's who did the CIC plot. �The OS's were generally faster at plotting 
than the QM's - fewer distractions in the air-conditioned cave.
>
> Joe

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