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    Re: Navy Navigation Regulation Manual
    From: Byron Franklin
    Date: 2009 Dec 7, 15:02 -0800

    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 -
    
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