rapid accent

[nigelH]

Originally Posted by scapaman

well dudes the total dive time including decent and rapid accent was 23 mins mod 32 (shit i know) was on o2 the thing is i dive with a stinger witch was ok just a warning about the accent. but my uwatec bloody shut down and went in to sos mode.

Well 23 mins at 32 meters on Air with a Bühlmann model at zero conservatism would have given you 5 minutes at 6m so if it was a square profile dive the Uwatec was on the money.

If it was a variable depth dive with a slow descent and you only hit 32 and averaged 27 the required stops drop to zero.

Originally Posted by scapaman

have now sold the uwatec now sticking with stinger.

I somehow think that's the wrong way round.

[stew]

all depends on the speed of the ascent & the nitrogen loaded.
if your alladin shows deco.. then you had deco to do.
the suunto is a 3 minute inbuilt safety net.

if it happened to me, i would have descended right away & multipiled the deco by 1/2. so 3 minutes would have been 4 1/2 minutes.
got out the water & went on o2.
after then i would have monitored myself until i thought i was clear.

sounds like you were lucky, perhaps.
your level of fitness may have saved you from a noticable bend.

[Garf]

Originally Posted by dublinbay

Lots of Irishmen have fast accents and never get bent...........

yeah, it's just "Bendy Jack" that doesn't get away with it.

Glad to see you back on the boards.

[Garf]

Originally Posted by scapaman

have now sold the uwatec now sticking with stinger .

Personally, if you are doing stops that require mandatory decompression, I'd bin the stinger. Despite the marketing blurb it's not a very effective computer for deco diving. It puts it's fingers in its electronic ears and goes "lah lah lah" when you mention deep stops, and if you ignore it and do them anyway it doesn't credit you for them at all and racks up the shallow stops.

If you miss a stop, most agencies have a missed stops protocol, very different from in water recompression before anyone one starts. They are generally linked to the amount of time you are on the surface. I.E. if you can get down within a given time frame, you perform a certain multiple of the missed stops. Missing the last three minutes obviously didn't kill you, but all deco diving is a gamble, and missing stops of any kind is never a wise plan as you just shorten the odds in that gamble.

I hate to sound a little harsh, but if you have done a deco procedures course you should know the answer to this question, and if you are not trained to do deco dives, well perhaps you shouldn't ask the question on a web forum but instead ask a professional instructor.

[lloydwatkin]

Originally Posted by stew

if it happened to me, i would have descended right away & multipiled the deco by 1/2. so 3 minutes would have been 4 1/2 minutes.

Just being a PITA but *1.5, or 3/2

[Richard Mason]

Originally Posted by nigelH

I somehow think that's the wrong way round.

I think it's called "shooting the messenger".

[scapaman]

cheers for the responce it was a slow decent and it ws not a square profile advarge depth was about 27. but when looking at my tables after the dive it said i could have another five mins at that depth.so maybe the uwatec was over cautious but it still gave me a fright.
and as for my fitness i`m the fitess fat sod you will see. ( joke)

[Juz]

If it were me, having missed 3 mins of stops, I'd have dropped back down, added the 50% and made a very slow ascent to surface.

In essence, I would probably have gone back to 6m, stayed for 6 mins and taken another 5-6 mins to reach the surface.

Juz

[TerryH]

Originally Posted by nigelH

I somehow think that's the wrong way round.

Yep I would have kept the Uwatec and bought a D-timer as a back up.

[uwila]

Follow your 'missed stops' protocol, and if you can't (maybe your buddy is still down there and there's nobody to drop back down with you), then get out of the water and go onto 100% O2 and make sure you're monitored by someone else.

Wise choice to bin the 2nd dive.

Glad there wasn't a problem, Chris