P3

"Swim over" is a little confusing here. You can "Swim over" Henley's and only be around 60' deep. If you follow the jump line down, you will hit 130' before the bedding plane, but you are still "over" Henley's. Now if you do go through the bedding plane to the top of the room, then you should be on trimix.

I hope this answers stairman's question.

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Originally Posted by TracyN

Was it orange line? If so that is the line that Paul put in. Initially I thought he was doing it because the line was broken.

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Yep, that's the one...

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Originally Posted by stairman

Ive never been to Henleys but thought you could swim over it without dropping down to trimix depths.

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You can. The jump to Hendley's Castle is a jump downward, but the main line runs through the top of the room. So you could swim through that room and stay up on the main line, well out of trimix depths, if you wanted to.

Brian

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Originally Posted by FW

"Swim over" is a little confusing here. You can "Swim over" Henley's and only be around 60' deep. If you follow the jump line down, you will hit 130' before the bedding plane, but you are still "over" Henley's. Now if you do go through the bedding plane to the top of the room, then you should be on trimix.

I hope this answers stairman's question.

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Ah So that makes more sense I thought he meant swimming around the top after the bedding plane. if memory is correct we did it last on 21/30 with a stage on 32 breath the stage in and drop after the sand slide. Drop down then return Breath the stage out and your deco is also nothing.

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Originally Posted by curtschu

Ah So that makes more sense I thought he meant swimming around the top after the bedding plane. if memory is correct we did it last on 21/30 with a stage on 32 breath the stage in and drop after the sand slide. Drop down then return Breath the stage out and your deco is also nothing.

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That's how we do it as well - although with a bit less O2 to keep the PO2 under 1.4 and a bit more He to keep the END under 100' at 190'. 18/35 works fine. If I recall, we normally have only around 5 minutes on O2 after the swim back to the cavern.

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Originally Posted by hunabku

[...]You specifically remember from your NAUI cave 1 training that you were not allowed to dive syphons. [...] Could you find a reference in your course materials for the restriction on diving syphons. [...]

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Unit 2, slide 5 - "Cave 1 - Diving Policies" - last bullet point "No diving in a siphon."
Unit 3, slide 12, from the IG - "You are not learning to dive in siphons." [bolded in the IG]

(other prohibitions at the Cave 1 level are covered in Unit 3, slide 13: Blue Holes, Sumps, Underground Lakes, Ice Caves)

Best regards -

gkn
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Gerard K. Newman | NAUI #48937 | Kona, HI