Drager Dolphin - Minimum Safe Depth

machas · 19th October 2006, 13:02

I am looking for information on the minimum safe operating depth for the Drager Dolphin.
I'm looking at a trip that would involve a few days of 15-20 ft/60 minute dives, in addition to several days of reef diving. I'd like to dive the Drager, but have heard of the risk of shallow water blackout. I've looked through my old course materials and don't really see this issue addressed beyond avoiding long surface swims.
I would appreciate any insight RWF members can provide.
Thanks!

4ster · 19th October 2006, 14:46

You won't have a problem if you dive the unit as Drager recommends, using the correct orifice size for your depth. Do your flow tests before the dive to make sure flow is correct for the selected orifice and you are set.

You are right, the most dangerous time on the loop is on the surface. The Dolphin is set up so that it will supply way over what you need (unless you are a super fit athelete working really hard for an exteded time).

Have fun,
Steve

Evil Dolphin · 19th October 2006, 20:12

Quote: (Originally Posted by machas)

I am looking for information on the minimum safe operating depth for the Drager Dolphin.
I'm looking at a trip that would involve a few days of 15-20 ft/60 minute dives, in addition to several days of reef diving. I'd like to dive the Drager, but have heard of the risk of shallow water blackout. I've looked through my old course materials and don't really see this issue addressed beyond avoiding long surface swims.
I would appreciate any insight RWF members can provide.
Thanks!

That's the kind of diving the Drager Dolphin was made for. If your really going no deeper than 20 feet, use 60% nitrox on the 60% orifice and you should be able to make two 45 minute dives on one 28ft tank with a little bit of gas left over. Just make sure you have a working oxyguage. I NEVER HAVE and I NEVER WILL dive my dolphin witout an oxyguage or some other kind of PO2 monitor.

grandizer52 · 19th October 2006, 21:05

If your doing a shallow dive you'll be fine cause the Dollt is supa dupa safe at those depths...if you can see if you coud get hooked up with a 100% orifice if you you know your gonna be 30 ft or shallower, otherwise 60 on the 60 is gonna be cool cool for ya...you'll be super awake to when your done...so you can pound a few beers and tell how you wrestled shamoo off pamala anderson

laytah
steve

dan@scuba-training.net · 19th October 2006, 21:55

Quote: (Originally Posted by grandizer52)

you'll be super awake to when your done...so you can pound a few beers and tell how you wrestled shamoo off pamala anderson

Dive all day, party all night, repeat

E-man · 20th October 2006, 22:27

if its 20ft max then id go 100% o2 with w/e orifice, youll just waste more gas with the lower orifices, and your good to go

19th October 2006, 13:02	#1 (permalink)
machas New Member Current Rebreather/s: Dolphin Other Rebreather/s: Dolphin Join Date: Oct 2006 Location: Illinois Posts: 1	Drager Dolphin - Minimum Safe Depth I am looking for information on the minimum safe operating depth for the Drager Dolphin. I'm looking at a trip that would involve a few days of 15-20 ft/60 minute dives, in addition to several days of reef diving. I'd like to dive the Drager, but have heard of the risk of shallow water blackout. I've looked through my old course materials and don't really see this issue addressed beyond avoiding long surface swims. I would appreciate any insight RWF members can provide. Thanks!
(Offline)

19th October 2006, 14:46	#2 (permalink)
4ster Addicted to Oxygen Current Rebreather/s: rEvo Other Rebreather/s: rEvo Join Date: Mar 2006 Location: Arlington, Washington Posts: 256	Re: Drager Dolphin - Minimum Safe Depth You won't have a problem if you dive the unit as Drager recommends, using the correct orifice size for your depth. Do your flow tests before the dive to make sure flow is correct for the selected orifice and you are set. You are right, the most dangerous time on the loop is on the surface. The Dolphin is set up so that it will supply way over what you need (unless you are a super fit athelete working really hard for an exteded time). Have fun, Steve __________________ Steve "My problem is that I have trouble reconciling my gross habits with my net income." Errol Flynn
(Offline)

19th October 2006, 20:12	#3 (permalink)
Evil Dolphin New Member Current Rebreather/s: Sport Kiss Other Rebreather/s: Join Date: Sep 2005 Location: Puget Sound USA Posts: 28	Re: Drager Dolphin - Minimum Safe Depth Quote: (Originally Posted by machas) I am looking for information on the minimum safe operating depth for the Drager Dolphin. I'm looking at a trip that would involve a few days of 15-20 ft/60 minute dives, in addition to several days of reef diving. I'd like to dive the Drager, but have heard of the risk of shallow water blackout. I've looked through my old course materials and don't really see this issue addressed beyond avoiding long surface swims. I would appreciate any insight RWF members can provide. Thanks! That's the kind of diving the Drager Dolphin was made for. If your really going no deeper than 20 feet, use 60% nitrox on the 60% orifice and you should be able to make two 45 minute dives on one 28ft tank with a little bit of gas left over. Just make sure you have a working oxyguage. I NEVER HAVE and I NEVER WILL dive my dolphin witout an oxyguage or some other kind of PO2 monitor.
(Offline)

19th October 2006, 21:05	#4 (permalink)
grandizer52 Sport Kiss & Shearwater Current Rebreather/s: Sport Kiss Other CCR Home Build Other Rebreather/s: Not Bought Yet Sport Kiss Classic Kiss MK 15.X Other CCR Home Build Join Date: May 2006 Location: pearl city hawaii EARTH moving to Iscandar Posts: 254	Re: Drager Dolphin - Minimum Safe Depth If your doing a shallow dive you'll be fine cause the Dollt is supa dupa safe at those depths...if you can see if you coud get hooked up with a 100% orifice if you you know your gonna be 30 ft or shallower, otherwise 60 on the 60 is gonna be cool cool for ya...you'll be super awake to when your done...so you can pound a few beers and tell how you wrestled shamoo off pamala anderson laytah steve
(Offline)

19th October 2006, 21:55	#5 (permalink)
dan@scuba-training.net New Member Current Rebreather/s: Inspiration Classic Other Rebreather/s: Not Bought Yet Megalodon Sport Kiss Join Date: Dec 2005 Location: Florida Posts: 97	Re: Drager Dolphin - Minimum Safe Depth Quote: (Originally Posted by grandizer52) you'll be super awake to when your done...so you can pound a few beers and tell how you wrestled shamoo off pamala anderson Dive all day, party all night, repeat
(Offline)

20th October 2006, 22:27	#6 (permalink)
E-man On the loop! Current Rebreather/s: Inspiration Classic Optima Other Rebreather/s: Titan Join Date: Sep 2005 Location: Eastern Coast ;) Posts: 212	Re: Drager Dolphin - Minimum Safe Depth if its 20ft max then id go 100% o2 with w/e orifice, youll just waste more gas with the lower orifices, and your good to go
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