Wow, that brings back memories. We had a relative (cousin I think) who was a high ranking Naval Officer (retired from a Pentagon assignment as an Admiral as I recall but don't know much else about him). Anyway, around Christmas 1970 he stopped by our house and gave my dad that manual hot off the presses. Dad wasn't so interested in the physics or technical side of diving, he just wanted to know enough to get underwater to spear as many halibut as possible while throwing the occasional lobster and abalone in his game bag. I commandeered the manual and devoured every word, diagram and chart. Amazing what will bring back such vivid memories. M
I SEE HOW IT IS. WHEN OTHER PEOPLE GO OUTSIDE IT'S "GOOD FOR YOUR HEALTH" AND "HIGHLY RECOMMENDED." BUT WHEN I GO OUTSIDE IT'S A "CONTAINMENT BREACH" AND A "HIGH-LEVEL THREAT TO PUBLIC SAFETY." OK, BE THAT WAY.
I still have my U.S. Navy Diving Manual, March 1970 in my library. I was issued to us in the U.S.A.F. and I keep it as a great reference. It goes into detail on the USD Aquamaster, and how to service it. I also like the physics diagrams, and have used the diagram on breathing cycles. I even used that diagram for explaining breathing to a voice teacher from my church choir.
John C. Ratliff Diving since 1959, at age 13. Haven't stopped, and still enjoy getting wet.
I have not had the time to delve into it much yet. But the impression I get is that it has more to do with surface supplied diving than SCUBA? That is fine because as of late I have had a growing interest in hard hat diving. Not sure I'm ever going to get a go at it?, but the interest is there. Mark
New Diver who sees diving with vintage gear a fun hazard, not a safety hazard. "I just want to dive my Scubair 300 and not get hassled by The Man!" USN 1989-1993.
Neither of these latter ones are quite as good as the original. Again, my opinion.
All three of these illustrate the problems of current full-face snorkeling mask designs, as they advertise them as using only nose-breathing, and "normal breathing." This "normal breathing" represents "tidal volume," which you can see in all of these diagrams is a very small amount, not enough in my opinion to push the CO2-laden air out of the facemask and allow outside, fresh air, in. These masks need the snorkeler to use deep breathing techniques to use them safely.