@gypsyjim Akimbo
As someone who began diving when there was no bcd,
no spg, no such thing as an alternate air source, no dive computers, masks that were like looking through a long rubber pipe compared to today's low volume beauties, J valves as your only "reserve", and only stiff, thick wetsuits, I have seen a great deal change in this sport.
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Jim just exactly did you begin your long diving career ?
FYI
A very brief history or the SPG
France:
1926 (88 years ago) Le prieu
1942 Cosmodes (Spelling???)
United States :
1955 (62 years ago) Se Air aka Mar-Mac
!957 (60 years ago) US Divers Pressure gauge with dial #17566
1958 Sportsways (Defunct )
1959 Diving Industries (Defunct)
!962 Dacor (defunct )
1963 SCUBA Pro
1963 Voit (Defunct )
SPG - 1926 to 2017 -- 88 years !
Now you know... Most equipment in diving has been around for a while - and is in a constant stage of evolution
I will always recall the article published several years ago by the editor of
Dive Training who stated he began diving in 1965 long before SPGs were invented etc. That editor writes about I believe ,I heard, I suspect ,some one told me, generally always devoid of facts and generally perpetrates the charade that he is a dive pioneer historian -- nothing could be farther from the truth
SDM