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Hypothetical - 2 AI transmitters instead of backup SPG?

Discussion in 'Computers, Gauges, Watches and Analyzers' started by Shafqat Ahmed, Jul 12, 2019.

  1. KWS

    KWS ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 500 - 999
    Location: SE TEXAS
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    My issue is that just because it works for you at your level of compitance does not mean it is sound advice for others,

    As haveing a spare comuter goes then I am somewhat like you however i leave my spare computer in the bag until i need it depending on the dive. Shallow dives you dont need one pter let alone 2.

    Every time you change batteries you weaken the integrity of the area involving the battery. Whether you get a slight cross thread or get a spec of something on the oring etc. With a SPG you never have those issues. Generally if it is water tight on monday it will be 10 years form now also. I dont know much about the teric but i do have preditors and petrels. Shearwaters are made for the user to maintain unlike other brands. I am a die hard shearwater fan. That aside most can not handle one puter let alone 2. And many can not change from air to nitrox with out a book. Given that my comment was regarding computers in general and not specific the teric.

    Most do not many know their puters inside and out and that is where first the problem starts and second they loose sight of what is needed. vs what complicates a problem. In most cases more is not better.

    As to your comment to the OP,,,, If they can manage 2 comuters then fine. MOst people can not. Also as the rec world goes the puter is really nothing more than an electronic dive table, depth gage and watch. On a rec dive you dont need tables so a 1000 dollar backup is a pretty expensive depth gage and watch.
     
  2. caruso

    caruso Banned

    # of Dives: 200 - 499
    Location: Long Island, NY
    1,662
    1,186
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    I change the battery in my computer when it reads low. It's user replaceable and I carry spares and O-rings in my save-a-dive-kit. I don't send it out or replace the battery every year just because I'm having my gear done. It's a waste of money and bad for the environment. That's another advantage of having a backup computer- you don't have to be as concerned with changing the battery on your primary. As an aside- I don't send out my gear for service every year, perhaps the regulators only get serviced. I mail them without the hoses to a reg tech I met online for about $35 each.

    I maintain gear for myself, my girlfriend, her son, and my two sibling dive buddies, and I've got a handful of spares- so between all of us including backups, that's over a dozen dive computers and NEVER has more than one computer indicated LOW BATT anywhere close to the same time.
     
  3. KWS

    KWS ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 500 - 999
    Location: SE TEXAS
    4,238
    940
    113

    WOW I think you have missed the whole point of the conversation and are digging to justify/defend the practice for the sake of defending something. Not that I am defending them but the DIR folks would tear you viewpoint to shreads. When and If a failure occures it does not make a difference what statistical curve you are using because it failed ( the reason if not important) and you have to recover. The idea is to implement things with the least probability of failure. My point in this has been and is still if a SPG will do the job for 100$ than why use another device that costs much more and is the same catagory of item that has just failed? People can do what they want, they alone are responsible for their dives and no one else. My position is one of process and not about giving or denying permission.
     
  4. caruso

    caruso Banned

    # of Dives: 200 - 499
    Location: Long Island, NY
    1,662
    1,186
    113
    That seems excessive. The lithium CR3 batteries in my transmitters have lasted over 5 years, and as with yours there's a low battery indicator and at least with my transmitter it's as easy as changing a TV remote battery, so why toss out perfectly good batteries (and O-rings), it's not good for the environment and a waste of money even if it's not all that much? There's also a slightly greater chance of a battery compartment flood after a battery change, why risk it?

    Something's wrong. Either you're using poorly manufactured gear, you're not maintaining it well, having it serviced by incompetent techs, or you're just really unlucky.
     
  5. caruso

    caruso Banned

    # of Dives: 200 - 499
    Location: Long Island, NY
    1,662
    1,186
    113
    @loosenit2 hasn't missed the point at all. The 18-Wheeler analogy was spot on.
     
  6. Joneill

    Joneill Loggerhead Turtle

    # of Dives: 100 - 199
    Location: New Jersey, USA
    1,363
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    I have other uses for them so I don't just throw them out after I swap out from the transmitters. When I do eventually throw them out I also take them to a battery drop off location - they don't go in the trash!
     
    caruso likes this.
  7. KWS

    KWS ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 500 - 999
    Location: SE TEXAS
    4,238
    940
    113
    Good for you . You may be able to do this but most are not. And if some bozo messes it up then you get what you get and he probably messes up all teh gear you sent to them.
     
  8. caruso

    caruso Banned

    # of Dives: 200 - 499
    Location: Long Island, NY
    1,662
    1,186
    113
    How do you know most dive computers do not have user replaceable batteries?. Have you researched dive computers and based on solid data you have arrived at the correct conclusion that most divers use dive computers that do not have user replaceable batteries?

    I have no clue what you mean about some bozo messing up all the gear he is sent. I send my regulators to a regulator technician that has done a fine job to date (I also purchase from him), and from speaking with him and diving the regulators after service, I trust that he knows what he's doing. Whenever you hand your life support gear off to someone to service you are putting your life in their hands, and there's always a possibility that they're going to get it wrong. No clue what relevance a technician's ability has to this discussion, especially given that you send your gear off for service every year and face the same risks that the rest of us do.
     
  9. dmaziuk

    dmaziuk Orca

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    All analogies suck, but car analogies suck particularly hard. Some devices have a bathtub failure curve, some follow the bell curve, and for some others it's pretty much a line. Failure rates of 18-wheeler gearboxes are about as relevant to dive computers as the phase of the moon: to colour of my underwear.
     
  10. KWS

    KWS ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 500 - 999
    Location: SE TEXAS
    4,238
    940
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    You just answered your own question.
     

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