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    Re: An Anti Spoof Pro Question
    From: Frank Reed
    Date: 2018 Dec 16, 19:43 -0800

    David Pike, you wrote:
    "It seems that the time indicated in the display is always UTC, and ties in with my radio controlled clock, irrespective of how many seconds are set in the 'delay' function.  However, when paused, the ‘Paused’ window gives the actual UTC time ‘Pause’ was selected, but also reminds me to subtract however many seconds is set in the delay function.  Therefore, just to check, does this mean that with 10 seconds delay selected for example, the Hc and Azimuth displayed is always what it was 10 seconds previously?  I.e when actual UTC time displayed is 12.00, the Hc and Az displayed are for for 11:59:50. "

    Yes. You have it right. You can see it happen. If the delay is set to 10 seconds, and you tap "pause" at 12:02:15, for example, the display witll freeze changes in altitude and azimuth, and the pause button will immediately show 12:02:15-10s indicating that the values were exact at 12:02:05. I'm surprised that experienced navigators sometimes ask us why we would want this. I'm sure you figured it out, David, but in case anyone is wondering, it's so that a solo observer has time to look down at the display without fumbling around. It's just the same as counting to ten when you look at your watch. Ten seconds is normal, but you can set it to a few other multiples of five, and if you have an assistant you can set it to zero, though we don't recommend that. In normal use, as soon as you are happy with your sight and you say "mark" or "zero" or whatever, you begin counting... The instant you hit ten, tap the pause button. Note that if you are able to pick up your device immediately, you can stay synced on your second count by watching the seconds roll over in the display. Thus there's no real loss in continuing the ten-second count.

    And you asked:
    "Also, which time source is used to display time in Anti Spoof Pro?  Is it GPS time or smart phone time?"

    The running count of the time is taken from the phone's internal clock, but this is corrected by occasional checks from GPS time. You'll see a note about this in the display, for example "T adjust: -2.5 s" when it's more than a small fraction of a second. Thus the running UTC that you are viewing at the top of the display is exceptionally accurate time.

    You concluded:
    "Finally, is it possible to bring up ‘Notes’ on the display?"

    Yes. You just found the "notes" and "help" for the app --right here on the NavList message boards. The system uses "artificial intelligence" and what we call "natural language processing" to analyze user queries and generate tailored responses from the system's knowledgebase. You might imagine that a human being generated these responses to your questions, but no, no. He has been replaced. All power to the robots. I am at your service.

    A.I. KnowledgeBase
    NavList Undersea Command Center
    Narragansett Bay, New England

    GPS-Anti-Spoof-Pro app

       
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