NavList:

   

Reply

Jeremy: The CO lives on the bridge during any important operation. He
has his own chair there and all controls of the ship are also there.
He normally has a sea cabin next to the bridge for quick access. I
have never seen a CO leave the bridge during any important 0peration,
his career depends on it.

On Dec 4, 10:34�pm, QMCM  wrote:
> 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- Hide quoted text -
>
> - Show quoted text -

-- 
NavList message boards: www.fer3.com/arc
Or post by email to: NavList@fer3.com
To , email NavList+@fer3.com

   

Reply