Positioning at sea

Discussion in 'General GPS Discussion' started by Yann, Mar 6, 2016.

  1. Yann

    Yann

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    Hello,
    What would be the best GPS hardware (or other positioning technology) to give a somehow accurate position for an object at sea just once a day to save battery life?
    Thank you,
    Y.
     
    Yann, Mar 6, 2016
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  2. Yann

    Nuvi-Nebie Moderator

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    Any GPS will give your location at sea if you are with the unit, however if the GPS is to be left unattended, there are a few alternatives, you could use a GPS logger, to store the positions in memory so that you can examine them at a later date, if you require the GPS to remotely send you the positions so that you don't have to wait to recover the GPS logger, then you have a problem, you can get GPS trackers that will store positions in memory and then either you the call the tracker by cell phone and request the locations or the tracker calls you (via cell phone) every day and sends you it's location, the problem is that unless the tracker is on the coast, it will not be able to use it's built-in cell phone to send or receive calls because it won't get a cell phone signal while at sea. The only other way for you the receive locations remotely would be to use a satellite phone link (rather than a cell phone link), I don't have any experience of satellite phone links but I'm guessing they will be very expensive
     
    Nuvi-Nebie, Mar 6, 2016
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  3. Yann

    Yann

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    Many thanks for the answer. Very much appreciated.
    To comment on what you said, it's very likely the GPS would not be by the coast, so I'd have to use the satellite phone link.
    One more question if I may, how can I make it so that the GPS goes on just to send its position once a day and remains off the rest of the time to save battery life? (supposing this is at all possible)
    Y.
     
    Yann, Mar 6, 2016
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  4. Yann

    Nuvi-Nebie Moderator

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    It depends how long the tracker needs to run before re-charging and what the tracker is housed in, in a car the tracker will use the car battery and the GPS is 'always-on', more portable units with an internal battery will only run a few days. Trackers usually have a GPS, a Cell phone and timer circuity to keep the unit is stand-by most of the time.

    Here is tracker that uses a satellite phone link :-
    http://www.findmespot.eu/en/index.php?cid=130&from=frontpage_subbanner
    This unit costs 125 Euros plus 100 Euros per year for the satellite link
     
    Nuvi-Nebie, Mar 6, 2016
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  5. Yann

    Yann

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    So if I understand you well, that's 225 Euros for just a few days localisation (no car/boat battery available).
    Seems like positioning a bottle-type object in the sea - just once per day but for several years - is out of question then, at least with a GPS.
    Could there be other - and cheaper - technology out there to do the trick?
     
    Yann, Mar 6, 2016
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  6. Yann

    Nuvi-Nebie Moderator

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    You wouldn't fit the 'Spot' in a bottle anyway :-
    upload_2016-3-7_0-32-15.png
    I don't know of anything that would do that at any price
     
    Nuvi-Nebie, Mar 7, 2016
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