Marek K
Contributor
Tim--
OK, I did a quick comparison of your U.S. Navy tables to my old 1980s PADI Dive Tables (which are copyright 1983, by the way!).
Table 1 was pretty much identical... PADI also had both feet and meters (very good idea!), but rounded off the meters to the nearest 0.5 meter. Because they truncated the table, PADI didn't show any ND limits for depths down to and including 35 ft (hey, I guess they figured at those depths you'd be out of air before you ran out of bottom time); the ND curve only appeared starting at 40 ft.
The old PADI Table 1 only showed depths to 140 ft; I seem to remember that 130 ft was still the rec limit. The other interesting thing, of course, is that the old PADI tables showed some basic emergency deco information below the ND limits; deco stop times, all at 10 ft (considering their 140-ft cut-off).
It's at Table 2 that differences started appearing. The Navy table seems to be more conservative, requiring relatively more SI to get down to a given Pressure Group.
And that threw Table 3 way off, comparing the two tables.
Anyway... interesting exercise!
Um, you had to get that GUE plug in, didn't you?
(<-- Smiley! Note the smiley!)
Cheers!
Wait... not Aloha... how about "Cześć"? (Pronounced just like it's spelled in Polish.
)
--Marek
OK, I did a quick comparison of your U.S. Navy tables to my old 1980s PADI Dive Tables (which are copyright 1983, by the way!).
Table 1 was pretty much identical... PADI also had both feet and meters (very good idea!), but rounded off the meters to the nearest 0.5 meter. Because they truncated the table, PADI didn't show any ND limits for depths down to and including 35 ft (hey, I guess they figured at those depths you'd be out of air before you ran out of bottom time); the ND curve only appeared starting at 40 ft.
The old PADI Table 1 only showed depths to 140 ft; I seem to remember that 130 ft was still the rec limit. The other interesting thing, of course, is that the old PADI tables showed some basic emergency deco information below the ND limits; deco stop times, all at 10 ft (considering their 140-ft cut-off).
It's at Table 2 that differences started appearing. The Navy table seems to be more conservative, requiring relatively more SI to get down to a given Pressure Group.
And that threw Table 3 way off, comparing the two tables.
Anyway... interesting exercise!
I would hope so!! Your tax dollars, and mine...kidspot:
Yeah, probably worth doing.kidspot:
Um, you had to get that GUE plug in, didn't you?
Cheers!
Wait... not Aloha... how about "Cześć"? (Pronounced just like it's spelled in Polish.
)--Marek
lol - what can I say, I like simplicity and conservatism... along with irony and sarcasm... 
