Dumb scuba products

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Back in the seventies I did purchase a very expensive Scubapro pressure gauge, which instead of showing bars, was showings minutes of air remaining. The needle did move back on the scale according to external pressure, as the device did contain some sort of depth gauge. All mechanical!
I do not remember the name of this device, nor photos on the Internet. If you can refresh my memory I will be happy to see it again.
Of course, after a couple of dives, I found myself doing the calculation back for transforming that crap "minutes" indication on the real pressure in my bottles, so I did bring it back to the shop and swapped it with a standard pressure gauge.
The real crap thing is that the conversion between pressure and minutes was fixed, assuming a 20-liters twin bottle (which was the standard at the time) and an air consumption of 20 liters/minute.
 
Yikes!

By any chance, was this the thing?
 

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No that was the the DCP (decompressimetro, in Italian). I also had that device, it lasted a couple of years. There were no digital computers at the time, and that analog decompression meter was giving some useful info. But it was also dangerous, as it was modelling just an intermediate body tissue, with an hemi-saturation time of 30 minutes. So it was correct only for diving profiles at intermediate depth (30-40m) and not too long.
 
Well, crap, you're still here -- even after that O2 mishap!
 
Well, searching for this Dive Timer I did discover an Italian web site containing a lot of very good stuff, documents, and photos regarding strange and old diving equipment:
home | BluTimeScubaHistory
It deserves some tome for being visited...
From there I have got the complete Scubapro catalogues of year 1977:
http://www.angelofarina.it/Public/Scubapro/Scubapro-Catalogue-1977.pdf
Here you find a number of really dumb or instead very interesting diving gear pieces, apart form the Dive Timer. For example see:
- at pag. 7 the Supervision mask
- at pagg. 16-17 the Scubasystem, an integrated bottle+buoyancy compensator very "Custeau style"
- at pagg. 18-19 an antesignian of modern BP+WING systems
- at pagg. 28-29 the mythical Pilot regulator
- at pag. 45, the Scubapro Carry-All, a plastic trash can for your equipment
- at pag. 47, the Diver's Hat. I am missing it strongly...
 
I did my share of solo night dives, though UV is still on my bucket list :)
Get a blue light not a UV light. I) the absorption max for a lot fluorphores underwater is more in the blue and Ii) it is a lot safer for other divers. UV is invisible to be human eye and thus there is no aversion response if some dufus shines it into your face.
 
www.diverguard.com

This was mentioned previously. I remember listening to them at their booth at DEMA in Orlando a few years ago. The entire experience was made even more special by the presenter booth-babe who had never dived but was “prepped” by the manufacturer on the day of the show. NO ONE asked her any tough questions either.
 
https://www.shearwater.com/products/swift/

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