Drop tanks

finbar.taylor · 29th August 2008, 09:43

This will become clear in a few weeks but.......

What do you have in your drop tank and what depth do you deploy it to?

bletso · 29th August 2008, 09:52

only drop cylinders in caves. In OW I keep them on me.

Dale

Ben Field · 29th August 2008, 10:08

By "Drop tank" I assume he means a tank + reg that is lowered to divers on request (by yellow/SOS buoy) in open water, rather than staged drop tanks in a cave? If we're on a mixed boat we use a drop tank of air (21%) as we don't know who will be recieving it and if they'll know what to do with it... we can then sort out some 80% or something and swim it down to them as necessary, in the mean time they will at least have something to breath. I voted other as usually its Air on 12mtrs of rope...

finbar.taylor · 29th August 2008, 10:15

Quote: (Originally Posted by Ben Field)

By "Drop tank" I assume he means a tank + reg that is lowered to divers on request (by yellow/SOS buoy) in open water, rather than staged drop tanks in a cave? If we're on a mixed boat we use a drop tank of air (21%) as we don't know who will be recieving it and if they'll know what to do with it... we can then sort out some 80% or something and swim it down to them as necessary, in the mean time they will at least have something to breath. I voted other as usually its Air on 12mtrs of rope...

Thanks Ben that's exactly what I ment!

Words are not my strong point!

Fin

matt crane · 29th August 2008, 10:40

Our club uses a 15Ltr filled with 80% which is dropped to 6m on request.

**RichClark** · 29th August 2008, 11:29

I was out on Loyal Watcher a few weeks ago when someone requested a drop bottle (Yellow SMB). Darren drops a single buoy with O2 attached to a 6m line and a 50% attached to a 21m line.It struck me as a damn good idea to have both gases available.

Up until now, I had always taken a bottle with 80% and a 9m line, so thats what I selected in the poll, but my revise my system.

Cheers

Rich

***EBT*** · 29th August 2008, 11:38

I go with 50% since it buys you time and gives you a nice depth range. Once Im on that, theres time to sort a safety diver/spare gas from whats left on the boat.

Nemesis · 29th August 2008, 12:10

I have seen 40% and 100% (S80 and 7L ) on 30m line droped on demand.

Nemesis

Andy Del · 31st August 2008, 08:42

It depends on with whom I am diving.

Some dives, you take your gas with you, nothing will be coming down.

Or, either a single drop tank from the boat at 6m with O2, or a little deeper with 80%.

Or, a deco station with O2 at 6m and 40% at 30m ready to do and another similar setup on a single line for drifting divers.

Hope that helps to the data collecting...

cheers

Andy

colinicky · 31st August 2008, 10:46

Tis a brilliant idea Fin heard about it yesterday & I like it ;)

View Poll Results: What do you have in a drop tank and to what depth do you deploy it?
O2 6M	22	39.29%
80% 9M	22	39.29%
70% 12M	5	8.93%
50% 21M	15	26.79%
Air 66M	1	1.79%
Other	10	17.86%
Multiple Choice Poll. Voters: 56. You may not vote on this poll

29th August 2008, 09:43	#1 (permalink)
finbar.taylor RBW Writer Current Rebreather/s: Inspiration Classic Classic Kiss Other Rebreather/s: Join Date: Apr 2005 Location: UK, SE Posts: 116	Drop tanks This will become clear in a few weeks but....... What do you have in your drop tank and what depth do you deploy it to?
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29th August 2008, 09:52	#2 (permalink)
bletso An independent diver. Current Rebreather/s: Dolphin Home Build Other Rebreather/s: Dolphin Home Build Join Date: May 2006 Location: Louisville, KY, USA Posts: 302	Re: Drop tanks only drop cylinders in caves. In OW I keep them on me. Dale
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29th August 2008, 10:08	#3 (permalink)
Ben Field CK+Shearwater Current Rebreather/s: Classic Kiss Other Rebreather/s: Sport Kiss Join Date: Aug 2005 Location: Weymouth, England Posts: 2,009	Re: Drop tanks By "Drop tank" I assume he means a tank + reg that is lowered to divers on request (by yellow/SOS buoy) in open water, rather than staged drop tanks in a cave? If we're on a mixed boat we use a drop tank of air (21%) as we don't know who will be recieving it and if they'll know what to do with it... we can then sort out some 80% or something and swim it down to them as necessary, in the mean time they will at least have something to breath. I voted other as usually its Air on 12mtrs of rope... __________________ www.aquatec.co.uk www.hugsac.org.uk
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29th August 2008, 10:15	#4 (permalink)
finbar.taylor RBW Writer Current Rebreather/s: Inspiration Classic Classic Kiss Other Rebreather/s: Join Date: Apr 2005 Location: UK, SE Posts: 116	Re: Drop tanks Quote: (Originally Posted by Ben Field) By "Drop tank" I assume he means a tank + reg that is lowered to divers on request (by yellow/SOS buoy) in open water, rather than staged drop tanks in a cave? If we're on a mixed boat we use a drop tank of air (21%) as we don't know who will be recieving it and if they'll know what to do with it... we can then sort out some 80% or something and swim it down to them as necessary, in the mean time they will at least have something to breath. I voted other as usually its Air on 12mtrs of rope... Thanks Ben that's exactly what I ment! Words are not my strong point! Fin
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29th August 2008, 10:40	#5 (permalink)
matt crane RBW Member Current Rebreather/s: Inspiration Vision Other Rebreather/s: Inspiration Classic Join Date: Feb 2006 Location: Cornwall Posts: 231	Re: Drop tanks Our club uses a 15Ltr filled with 80% which is dropped to 6m on request.
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29th August 2008, 11:29	#6 (permalink)
RichClark Classic KISS No. 226 Current Rebreather/s: Classic Kiss Other Rebreather/s: Join Date: Mar 2005 Location: Hove, UK Posts: 850	Re: Drop tanks I was out on Loyal Watcher a few weeks ago when someone requested a drop bottle (Yellow SMB). Darren drops a single buoy with O2 attached to a 6m line and a 50% attached to a 21m line.It struck me as a damn good idea to have both gases available. Up until now, I had always taken a bottle with 80% and a 9m line, so thats what I selected in the poll, but my revise my system. Cheers Rich __________________ The more I learn about women, the more I want to go diving... just don't tell my wife I said that To taste something a little different, try http://www.thechillikitchen.co.uk
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29th August 2008, 11:38	#7 (permalink)
*EBT* Apprentice Luddite Current Rebreather/s: Classic Kiss Other Rebreather/s: Inspiration Classic Join Date: Feb 2005 Location: UK, Brighton Posts: 2,294	Re: Drop tanks I go with 50% since it buys you time and gives you a nice depth range. Once Im on that, theres time to sort a safety diver/spare gas from whats left on the boat. __________________ Eagles May Soar, but weasels don't get sucked into jet engines! RBW Terms of service
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29th August 2008, 12:10	#8 (permalink)
Nemesis RBW Member Current Rebreather/s: Not Bought Yet Other Rebreather/s: Not Bought Yet Join Date: Nov 2005 Posts: 9	Re: Drop tanks I have seen 40% and 100% (S80 and 7L ) on 30m line droped on demand. Nemesis
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31st August 2008, 08:42	#9 (permalink)
Andy Del Classic KISSer Current Rebreather/s: Sport Kiss Classic Kiss Other Rebreather/s: Join Date: Feb 2005 Location: Australia, Sunny Sydney Posts: 483	Re: Drop tanks It depends on with whom I am diving. Some dives, you take your gas with you, nothing will be coming down. Or, either a single drop tank from the boat at 6m with O2, or a little deeper with 80%. Or, a deco station with O2 at 6m and 40% at 30m ready to do and another similar setup on a single line for drifting divers. Hope that helps to the data collecting... cheers Andy
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31st August 2008, 10:46	#10 (permalink)
colinicky RBW Member Current Rebreather/s: Inspiration Vision Other Rebreather/s: Inspiration Classic Inspiration Vision Join Date: Mar 2005 Location: uk Posts: 811	Re: Drop tanks Tis a brilliant idea Fin heard about it yesterday & I like it ;)
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