Sentinel LSS - Trip Report

brokenbones · 31st March 2008, 16:09

Great report. Any in water pictures? I am really curious to see how the hoses route around the head (specially after seeing the pics that were posted of the Sentinel a few weeks ago).

Paul Evans · 1st April 2008, 15:11

Quote: (Originally Posted by Peter M)

Just a few brief words for now,
After a week on the first Sentinel course i have passed my Mod 1.
The instructors in the water for us newbies were:- Greg Such, Phil Short, Phil Sudan, These three guys were outstanding, i never had an uncomfortable moment at all.
Onboard all the instructors under training were also great during lectures.
Kevin, Al and Phil from CCRB had always an answer for all questions no matter how stupid, and they also listened to our comments and suggestions.
The unit never missed a dive all week for anyone.
Judging by the reaction of most people on the boat it was well recieved and well built, there was a few minor problems which Kevin had his people on by the third day.
Never having dived another rebreather i cant compare, but i can say in my opinion i did spend my money very very well

Now i must go and clean the unit down and get ready for the coming weekend in the shallows.

How did everyone else get on

Ilikerisk · 1st April 2008, 15:35

Does anyone from the trip have opinions about trim and hydrodynamics?

Peter M · 1st April 2008, 18:28

Quote: (Originally Posted by Paul Evans)

How did everyone else get on

The 5 in my group all really liked the unit, again we cant really compare as we were all new, but we were told that we took to it quicker than most !

Trim wise i was using a 7mm wetsuit and 2kg in each side and 2 kg in the pocket and by 4th dive was holding stops in horizontal and vertical positions at 6m without any problems,

Most others on the course after a few days were starting to like the unit, i think there was two who werent all that fussed but then you can please all of the people all of the time.

peter · 1st April 2008, 20:16

Quote: (Originally Posted by Barrie Law)

the breathing gas that has been expired travels into the head of the unit where the Oxygen is added and it passes through the scrubber from top to bottom and returns back up the outside of the scrubber canister and past the sensors to be re breathed.

So if you get some water in to the mouth piece/exhale hose you can’t blow that out though the overpressure valve? It goes straight in to the scrubber? Have I got it right, that the breather is not Flood recoverable?

Peter M · 1st April 2008, 20:34

It will not recover from a full flood but you can recover from a partial flood as i may have done this in my third dive

i do hope i have understand everything fully there was an awful lot to take in

Ilikerisk · 1st April 2008, 21:07

Quote: (Originally Posted by peter)

So if you get some water in to the mouth piece/exhale hose you can’t blow that out though the overpressure valve? It goes straight in to the scrubber? Have I got it right, that the breather is not Flood recoverable?

The OPV is on the bottom of the scrubber. From my understanding of the layout I saw at BTS, you're correct that the water goes through the scrubber before it gets to the OPV.

I think the theory is that the water is auto-purged whenever you're verticle or near verticle, but I don't know what this implies for full/partial flood recovery.

Nad · 2nd April 2008, 09:41

Quote: (Originally Posted by Ilikerisk)

The OPV is on the bottom of the scrubber. From my understanding of the layout I saw at BTS, you're correct that the water goes through the scrubber before it gets to the OPV.

I think the theory is that the water is auto-purged whenever you're verticle or near verticle, but I don't know what this implies for full/partial flood recovery.

The controversial is that water go through the scrubber. Yes it is so.
The scrubber is so efficient that will dry in a moment.Just the top of the scrubber will be touched, part that is also the first to be used so not really a matter.

Nad

Ilikerisk · 2nd April 2008, 16:28

Quote: (Originally Posted by Nad)

The controversial is that water go through the scrubber. Yes it is so.
The scrubber is so efficient that will dry in a moment.Just the top of the scrubber will be touched, part that is also the first to be used so not really a matter.

Nad

It would be nice if CCRB posted the manual online so we could start really understanding the device, its intended manner of operation, and its limitations.

Phil · 2nd April 2008, 20:03

Quote: (Originally Posted by brokenbones)

Great report. Any in water pictures? I am really curious to see how the hoses route around the head (specially after seeing the pics that were posted of the Sentinel a few weeks ago).

There you go, our unit cam with one set of hose weight, I think we need 2 per side. Kev, Phil & Al had 2 per side... We can see that Simon twisted his hose (bottom picture) so that the routing is different... a little loop at the back and then closer to the shoulder. Something to try! Overall a very good unit and trim is easy to achieve!

31st March 2008, 16:09	#61 (permalink)
brokenbones New Member Current Rebreather/s: Not Bought Yet Other Rebreather/s: Not Bought Yet Join Date: Jul 2007 Location: Canada Posts: 15	Re: Sentinel LSS - Trip Report Great report. Any in water pictures? I am really curious to see how the hoses route around the head (specially after seeing the pics that were posted of the Sentinel a few weeks ago).
(Online)

1st April 2008, 15:11	#62 (permalink)
Paul Evans Freedom is the Key. Current Rebreather/s: Megalodon Other Rebreather/s: Megalodon Join Date: Oct 2006 Location: London Posts: 135	Re: Sentinel LSS - Trip Report Quote: (Originally Posted by Peter M) Just a few brief words for now, After a week on the first Sentinel course i have passed my Mod 1. The instructors in the water for us newbies were:- Greg Such, Phil Short, Phil Sudan, These three guys were outstanding, i never had an uncomfortable moment at all. Onboard all the instructors under training were also great during lectures. Kevin, Al and Phil from CCRB had always an answer for all questions no matter how stupid, and they also listened to our comments and suggestions. The unit never missed a dive all week for anyone. Judging by the reaction of most people on the boat it was well recieved and well built, there was a few minor problems which Kevin had his people on by the third day. Never having dived another rebreather i cant compare, but i can say in my opinion i did spend my money very very well Now i must go and clean the unit down and get ready for the coming weekend in the shallows. How did everyone else get on __________________ "Freedom is what you do with what's been done to you." Jean-Paul Sartre "Any time anyone says, 'there is only one right way to do this' your bullshit meter should be pegged. Its a presumptive statement, made by a person who fears being proved wrong." Bill Gavin.
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1st April 2008, 15:35	#63 (permalink)
Ilikerisk New Member Current Rebreather/s: Not Bought Yet Other Rebreather/s: Not Bought Yet Join Date: Sep 2007 Location: New York Posts: 48	Re: Sentinel LSS - Trip Report Does anyone from the trip have opinions about trim and hydrodynamics?
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1st April 2008, 18:28	#64 (permalink)
Peter M New Member Current Rebreather/s: Other CCR Other Rebreather/s: Other CCR Join Date: Mar 2007 Location: Northern Ireland Posts: 52	Re: Sentinel LSS - Trip Report Quote: (Originally Posted by Paul Evans) How did everyone else get on The 5 in my group all really liked the unit, again we cant really compare as we were all new, but we were told that we took to it quicker than most ! Trim wise i was using a 7mm wetsuit and 2kg in each side and 2 kg in the pocket and by 4th dive was holding stops in horizontal and vertical positions at 6m without any problems, Most others on the course after a few days were starting to like the unit, i think there was two who werent all that fussed but then you can please all of the people all of the time.
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1st April 2008, 20:16	#65 (permalink)
peter New Member Current Rebreather/s: Inspiration Classic Other Rebreather/s: Join Date: Jan 2005 Location: Göteborg/Sweden Posts: 47	Re: Sentinel LSS - Trip Report Quote: (Originally Posted by Barrie Law) the breathing gas that has been expired travels into the head of the unit where the Oxygen is added and it passes through the scrubber from top to bottom and returns back up the outside of the scrubber canister and past the sensors to be re breathed. So if you get some water in to the mouth piece/exhale hose you can’t blow that out though the overpressure valve? It goes straight in to the scrubber? Have I got it right, that the breather is not Flood recoverable? __________________ Peter
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1st April 2008, 20:34	#66 (permalink)
Peter M New Member Current Rebreather/s: Other CCR Other Rebreather/s: Other CCR Join Date: Mar 2007 Location: Northern Ireland Posts: 52	Re: Sentinel LSS - Trip Report It will not recover from a full flood but you can recover from a partial flood as i may have done this in my third dive i do hope i have understand everything fully there was an awful lot to take in
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1st April 2008, 21:07	#67 (permalink)
Ilikerisk New Member Current Rebreather/s: Not Bought Yet Other Rebreather/s: Not Bought Yet Join Date: Sep 2007 Location: New York Posts: 48	Re: Sentinel LSS - Trip Report Quote: (Originally Posted by peter) So if you get some water in to the mouth piece/exhale hose you can’t blow that out though the overpressure valve? It goes straight in to the scrubber? Have I got it right, that the breather is not Flood recoverable? The OPV is on the bottom of the scrubber. From my understanding of the layout I saw at BTS, you're correct that the water goes through the scrubber before it gets to the OPV. I think the theory is that the water is auto-purged whenever you're verticle or near verticle, but I don't know what this implies for full/partial flood recovery.
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2nd April 2008, 09:41	#68 (permalink)
Nad Rebel to the Bone Current Rebreather/s: Ouroboros Other CCR Other Rebreather/s: Not Bought Yet Inspiration Classic Other CCR Join Date: Mar 2005 Location: Europe Posts: 983	Re: Sentinel LSS - Trip Report Quote: (Originally Posted by Ilikerisk) The OPV is on the bottom of the scrubber. From my understanding of the layout I saw at BTS, you're correct that the water goes through the scrubber before it gets to the OPV. I think the theory is that the water is auto-purged whenever you're verticle or near verticle, but I don't know what this implies for full/partial flood recovery. The controversial is that water go through the scrubber. Yes it is so. The scrubber is so efficient that will dry in a moment.Just the top of the scrubber will be touched, part that is also the first to be used so not really a matter. Nad __________________ The Impossible is often the Untried
(Online)

2nd April 2008, 16:28	#69 (permalink)
Ilikerisk New Member Current Rebreather/s: Not Bought Yet Other Rebreather/s: Not Bought Yet Join Date: Sep 2007 Location: New York Posts: 48	Re: Sentinel LSS - Trip Report Quote: (Originally Posted by Nad) The controversial is that water go through the scrubber. Yes it is so. The scrubber is so efficient that will dry in a moment.Just the top of the scrubber will be touched, part that is also the first to be used so not really a matter. Nad It would be nice if CCRB posted the manual online so we could start really understanding the device, its intended manner of operation, and its limitations.
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