Scuba fryd
Contributor
Had a discussion with my instructor wether AI alone is safe enough or not I believe they are enough in them self he believes you have to have a spg and a transmitter. Got my curious what a peoples preference and why
Spg, AI, both
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You’ll find a number of threads on the topic already. They’d be worth a scan.
IMO … It’s really a personal decision, especially for the recreational diver. After many, many dives using a backup SPG with my Perdix AI, I dropped the SPG.
I do have one in my backpack on the boat if ever had an issue before/between dives.
IMO … It’s really a personal decision, especially for the recreational diver. After many, many dives using a backup SPG with my Perdix AI, I dropped the SPG.
I do have one in my backpack on the boat if ever had an issue before/between dives.
CuzzA
Wetwork for Hire
It's silly to use both and defies logic. Some divers love to clip every piece of equipment they own on to themselves. Even instructors.
Next time ask him why he recommends both.
Capt Jim Wyatt
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I only use the transmitters - removed the spg a couple of years ago. Most all of my diving (95%) is cave diving. I lost one dive because the x-mitters failed to communicate with the handset after about 10-15 minutes into the dive. Replacing the x-mitter batteries fixed the problem.
I removed the SPG a couple of years ago too. It's still in my bag as a back up, but I haven't even had to change the battery in my transmitter yet. Never had a drop out.
Nice for quick checks while setting up. Small factor serves a back-up if things happen without too much clutter.
I have an SPG because it's part of Standard Equipment™ for the way I dive and my buddies expect it to be present, thus making them calmer and reducing friction. I have a transmitter because I appreciate the precise logging, mostly (I'm an information nerd). Hence both, even though either alone would be sufficient.
At the risk of derailing the thread, how many use 2 transmitters while diving doubles with a manifold? My tech instructor insisted I get a second transmitter, which I did. I can see how it might be necessary if I had to shut down a valve and then balance decompression obligations vs having anything to breathe. But I’m not doing deco, so figured I would head straight for the surface in the case of a valve shutdown, and I wouldn’t be at the bottom in the first place without a good reserve, so not sure how that second transmitter is actually useful.
I've never heard of anyone doing that, nor proposing a legitimate reason for it. An SPG (or, presumably, transmitter) on the left post should be adequate.
You are perhaps the only one. Does he dive with two SPGs on a set of manifolded doubles?
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