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    Re: Navy Navigation Regulation Manual
    From: John Huth
    Date: 2009 Dec 7, 18:55 -0500
    I'm not a Navy guy, but I'd bet good money that there are cases of major screw-ups because of CO's who didn't pay attention at a critical moment - not necessarily in the US, mind you.

    I'm an experimental physicist.   The closest analogy is on one of these large experiments, when you really need to have someone who knows every last detail of the experiment and accelerator from inside out.   I had to serve in that capacity and it was exhausting - but a great experience nonetheless.

    On Mon, Dec 7, 2009 at 6:02 PM, QMCM <byronink---.com> wrote:
    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 <byron...---.com> 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
    > 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, <joseph_schu...{at}rrv.net> 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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