147m on Pelagian

Inspired Trainer · 30th October 2007, 14:41

Hello

Just back from a trip to Lebanon with a group of 7 divers to visit HMS Victoria.

We dived 7 times on the wreck with 4 CCR divers and 3 OC divers ( 2 Inspo 1 Meg and of course myself with a Pelagian)

The viz was fantastic and the wreck still stands upright but has suffered some deck slippage on decks below 130m…the amount of decking falling to the seabed has made the ‘bottom’ somewhat shallower with hundreds of tonnes of metal work on the seabed now covered in a layer of silt. When we found the wreck the seabed was circa 156m. Now the deepest we could get to was 147m. We hit the bottom 3 times with up to 15 minutes bottom time and 280min deco’s (6 divers used Decochek Java and 1 double VR3’s)

One of the Inspo divers (Sandy from Oz) spotted HMS Victoria’s bell just sitting there near the bottom!…we returned ‘mob handed’ the next day to find the bell again very securely attached to a thick frame which unfortunately looked like it will keep its grip for a long time to come.

Very likely I will return in December with another group to video the bell – if people are interested to join in…pm me.

We took lots more video…I will try and show some at DEMA on the Rebreatherlab / Pelagian stand

Lebanon never fails to excite…we were there when the latest MP was blown up and then witnessed some Syrian jet doing ‘bombing runs’ over Tripoli…all good stuff to see when your 10km off-shore. Some more topside and underwater pics and deco plans to follow if anyones interested

cheers,

Mark

Inspired Trainer · 30th October 2007, 14:51

some more pics

the gloomy pic is a group of us swiming through the wreck at 130m...we dived after 4pm and the sun was very low in the water...the other pic is my Pelagian scrubber attached to my bail-out twinset. I filled it with 10/60 at the beginning of the week and managed all 7 dives from same refill (with almost 24hrs of inwater time)

ive since added the Rebreatherlab BOV but other than that its as standard ie no add buttons on lungs

cheers, Mark

heigo · 30th October 2007, 15:33

More pics of the wreck would be nice..

jhaaja · 30th October 2007, 15:36

Keep em coming! Would be nice to see some deco schedules also, any RGBM

JH

Inspired Trainer · 30th October 2007, 16:37

Heres the longest one i did on the trip (from Decochek)
You will see it has a shallower first stop than some other planners but I just think that this is the correct place

The Pelagian is a manual CCR so the bottom po2 is dictated by a sensible DIL. Adding o2 on the bottom is a rare occurence. The occasional o2 add during ascent keeps the po2 jiggling between 1.1 and 1.3, once at the stops and holding the upline the po2 is fairly easy to maintain at whatever you wish. I had a vr3 and nitek he also, the vr3 at 20% cleared 5 or so mins before and the nitek he a few mins after but then it was set with 5 optimised OC gases so it could keep up

I surfaced at 4hrs 40mins and we used Grace HP lime

Depth Arrive Stop Leave Mix
-------------------------------------
0 00:00 CCR 0.7
147 00:08 00:15 00:23 CCR 1.5
78 00:31 00:01 00:32 CCR 1.1
75 00:32 00:01 00:33 CCR 1.1
72 00:33 00:01 00:34 CCR 1.3
69 00:34 00:02 00:36 CCR 1.3
66 00:36 00:01 00:37 CCR 1.3
63 00:37 00:02 00:39 CCR 1.3
60 00:39 00:02 00:41 CCR 1.3
57 00:41 00:03 00:44 CCR 1.3
54 00:44 00:02 00:46 CCR 1.3
51 00:46 00:03 00:49 CCR 1.3
48 00:49 00:03 00:52 CCR 1.3
45 00:52 00:04 00:56 CCR 1.3
42 00:56 00:04 01:00 CCR 1.3
39 01:00 00:05 01:05 CCR 1.3
36 01:05 00:05 01:10 CCR 1.3
33 01:10 00:06 01:16 CCR 1.3
30 01:16 00:07 01:23 CCR 1.3
27 01:23 00:08 01:31 CCR 1.3
24 01:31 00:10 01:41 CCR 1.3
21 01:41 00:11 01:52 CCR 1.3
18 01:52 00:14 02:06 CCR 1.3
15 02:06 00:17 02:23 CCR 1.3
12 02:23 00:21 02:44 CCR 1.3
9 02:44 00:26 03:10 CCR 1.6
6 03:10 00:35 03:45 CCR 1.5
3 03:45 00:51 04:36 CCR 1.3
0 04:36 CCR 1.3

decoweenie · 30th October 2007, 16:50

Quote: (Originally Posted by Inspired Trainer)

You will see it has a shallower first stop than some other planners but I just think that this is the correct place

Could you please expand on why it is the correct place ?

Curious since we had planned to visit Lebanon sometimes ago as well, and I would have used a deeper first stop personally.

The wreck ambient condition looks fantastic...

Bobnob · 30th October 2007, 17:11

Nice Post Mr Me

shame about the bell , long rope fast boat

Inspired Trainer · 30th October 2007, 17:28

Hello,

The stop was here because the model called for it! (AB2 model) In my NSHO the stop is plenty deep enough

In a nut shell - First stop depths (the initial deco ceiling) are produced by depth/time profiles modified by ascent rates and po2's used during the dive...these then modify a series of theoretical tissues each subsequently governed by its own maximum overpressure...the model in use here uses a slightly different approach which i havent the time to explain at the mo, apologies. I think there are some interesting books on the matter you may wish to peruse, likely there are some deco experts on this list who could advise you in detail too.

I have a coupla Q's for you too to help me complete the picture

on what basis would you have neccesitated stopping deeper?
is this based on practical or theoretical experience?

The conditions on the wreck are pretty nice, a subsequent visit to film the bell revealed it had been moved by some cheeky chappies or maybe some wreckage had fallen on it...i suppose though if i had a crystal ball id be looking for lottery numbers

cheers

jhaaja · 30th October 2007, 17:38

Nice to hear that the Pelagian performs well! I tried Rogers unit when I visited there in September. I wish I had more money to buy the Pelagian too...

JH

denka · 30th October 2007, 18:33

Hello Mark,

I was wondering what changed your mind on using a rebreather. And why a MCCR and the Pelagian. Just curious

Groeten Dennis

30th October 2007, 15:33	#3 (permalink)
heigo bubbles Current Rebreather/s: Inspiration Classic Other Rebreather/s: Join Date: Jun 2005 Location: Thailand/Sweden Posts: 71	Re: 147m on Pelagian More pics of the wreck would be nice.. __________________ P3
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30th October 2007, 15:36	#4 (permalink)
jhaaja Custom Title Allowed! Current Rebreather/s: Inspiration Classic Other Rebreather/s: Join Date: Mar 2005 Location: Finland Posts: 867	Re: 147m on Pelagian Keep em coming! Would be nice to see some deco schedules also, any RGBM JH
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30th October 2007, 16:50	#6 (permalink)
decoweenie Crash Test Dummy Current Rebreather/s: Other CCR Other Rebreather/s: Other CCR Join Date: Feb 2005 Location: Cairo Posts: 5,510	Re: 147m on Pelagian Quote: (Originally Posted by Inspired Trainer) You will see it has a shallower first stop than some other planners but I just think that this is the correct place Could you please expand on why it is the correct place ? Curious since we had planned to visit Lebanon sometimes ago as well, and I would have used a deeper first stop personally. The wreck ambient condition looks fantastic...
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30th October 2007, 17:11	#7 (permalink)
Bobnob Sock Puppet banned - gobfish1 back Current Rebreather/s: Inspiration Classic Other Rebreather/s: Inspiration Classic Inspiration Vision Evolution Join Date: Oct 2007 Location: south of north Posts: 32	Re: 147m on Pelagian Nice Post Mr Me shame about the bell , long rope fast boat
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30th October 2007, 17:28	#8 (permalink)
Inspired Trainer New Member Current Rebreather/s: Pelagian Other Rebreather/s: Pelagian Join Date: Oct 2007 Location: London Posts: 63	Re: 147m on Pelagian Hello, The stop was here because the model called for it! (AB2 model) In my NSHO the stop is plenty deep enough In a nut shell - First stop depths (the initial deco ceiling) are produced by depth/time profiles modified by ascent rates and po2's used during the dive...these then modify a series of theoretical tissues each subsequently governed by its own maximum overpressure...the model in use here uses a slightly different approach which i havent the time to explain at the mo, apologies. I think there are some interesting books on the matter you may wish to peruse, likely there are some deco experts on this list who could advise you in detail too. I have a coupla Q's for you too to help me complete the picture on what basis would you have neccesitated stopping deeper? is this based on practical or theoretical experience? The conditions on the wreck are pretty nice, a subsequent visit to film the bell revealed it had been moved by some cheeky chappies or maybe some wreckage had fallen on it...i suppose though if i had a crystal ball id be looking for lottery numbers cheers Last edited by Inspired Trainer : 30th October 2007 at 17:32.
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30th October 2007, 17:38	#9 (permalink)
jhaaja Custom Title Allowed! Current Rebreather/s: Inspiration Classic Other Rebreather/s: Join Date: Mar 2005 Location: Finland Posts: 867	Re: 147m on Pelagian Nice to hear that the Pelagian performs well! I tried Rogers unit when I visited there in September. I wish I had more money to buy the Pelagian too... JH
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30th October 2007, 18:33	#10 (permalink)
denka New Member Current Rebreather/s: Not Bought Yet Other Rebreather/s: Not Bought Yet Join Date: Apr 2007 Location: holland Posts: 21	Re: 147m on Pelagian Hello Mark, I was wondering what changed your mind on using a rebreather. And why a MCCR and the Pelagian. Just curious Groeten Dennis
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