BOV and DPV diving

swadiver · 26th June 2008, 13:17

i am considering adding a bov. however i scooter a lot and am concerned about the drag and jaw fatigue w/o the use of a FFM. like to hear from those who DPV dive with a bov and their experiences. the only game in town for the optima appears to be the Golem gear unit, at present. i am sure it functions well, but the cross section seems large, so the drag while on the DPV and subsequent jaw fatigue looks to be an issue.

thanks

Ben Field · 26th June 2008, 13:41

Several people have added "chin rests" to help with BOV's leverage, particularly when scootering.

I have scootered without one and its fine, as long as you look straight ahead!

**nigelh** · 26th June 2008, 14:11

I would have thought the drag on the hoses far outweighs the drag on the slightly bigger centre piece.

I can't actually comment more because I've had the BOV longer than the scooter.

mempilot · 26th June 2008, 14:11

Jeff,

Howard and I did a dive the other day in a pretty stiff current. I had to abort my dive for scooter reasons, but I thought I'd let you know how the BOV and scooter worked together. The boat's GPS was registering a 1.6 to 1.9 knot north current with just a slight easterly crosswind. With the Submerge set to prop position 9, the highest, there was incredible flow over my gear. The Drager mask held the BOV in place with no problems what so ever, and there is no jaw fatigue since the five point mask harness distributes the force. Howard was diving his Optima with the BOV mouth piece and half mask.

I have dived the BOV without the mask, but not with the scooter. I found the BOV to create jaw fatigue only when swimming against strong currents, and not noticeable in standard conditions. Unfortuneatly, the BOV is really needed in the heavy conditions, and therefore, I have decided to stick with the FFM whenever possible.

You may want to talk directly with Howard (Scubadadmiami) and Marc (MarcLaukien) about their use of the Optima with the Golem BOV while scootering. They both have or had the same setup and scooter. As a matter of fact, Marc (now diving a HHCCR) and I are planning to do a scooter dive tomorrow. You are more than welcome to join us!

If you want to try the FFM in the pool, let me know.

Eric

Mark Chase · 26th June 2008, 14:43

I have scootered on wrecks with a Golum BOV, i havent noticed it to be an issue. I can rest it on my chest without any mods?? But i have only ever felt the need to do this on long deco or on the boat waiting to get in.

Jaw ache from bov's is best dealt with using apropriate mouthpieces or a gag.
I use a moulded mouthpiece thats griped by the teath at the back of the jaw. It seems to work well.

ATB

Mark

swadiver · 26th June 2008, 14:59

thanks for the responses, gentlemen. eric would love to dive but that pesky damn job is getting in the way again.

mempilot · 26th June 2008, 15:26

Quote: (Originally Posted by swadiver)

eric would love to dive but that pesky damn job is getting in the way again.

Well, there is an imminent solution to that: high oil prices.

Come over to the dark side and fly for Big Brother Airlines. What's bad is good if you catch my drift.

cameron · 26th June 2008, 17:51

I used to have the KISS BOV but found it absolutely brutal when scootering. I could not do anything over an hour 1/2 without my jaw really hurting.

I have fitted the Halcyon BOV to my KISS with some nice sleek streamlined hoses and could not be happier.

IMHO you need a chin rest if you are scootering

Cam

mempilot · 26th June 2008, 18:27

Quote: (Originally Posted by cameron)

IMHO you need a chin rest if you are scootering

Cam

Or a FFM.

lof · 26th June 2008, 19:26

I do several hour scooter dives into the current with no jaw fatigue. But then I have a strong jaw

or maybe it is the Seacure bite piece.

26th June 2008, 13:17	#1 (permalink)
swadiver New Member Current Rebreather/s: Optima Other Rebreather/s: Join Date: May 2006 Location: southeast florida Posts: 94	BOV and DPV diving i am considering adding a bov. however i scooter a lot and am concerned about the drag and jaw fatigue w/o the use of a FFM. like to hear from those who DPV dive with a bov and their experiences. the only game in town for the optima appears to be the Golem gear unit, at present. i am sure it functions well, but the cross section seems large, so the drag while on the DPV and subsequent jaw fatigue looks to be an issue. thanks
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26th June 2008, 13:41	#2 (permalink)
Ben Field CK+Shearwater Current Rebreather/s: Classic Kiss Other Rebreather/s: Sport Kiss Join Date: Aug 2005 Location: London, England Posts: 1,571	Re: BOV and DPV diving Several people have added "chin rests" to help with BOV's leverage, particularly when scootering. I have scootered without one and its fine, as long as you look straight ahead! __________________ www.hugsac.org.uk Beware Fridge Suck
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26th June 2008, 14:11	#3 (permalink)
nigelh New Member Current Rebreather/s: Inspiration Vision Other CCR Other Rebreather/s: Inspiration Classic Other CCR Join Date: Mar 2005 Location: Brighton, Sussex, UK Posts: 824	Re: BOV and DPV diving I would have thought the drag on the hoses far outweighs the drag on the slightly bigger centre piece. I can't actually comment more because I've had the BOV longer than the scooter. __________________ nigelh
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26th June 2008, 14:11	#4 (permalink)
mempilot What is this..terrafirma? Current Rebreather/s: Megalodon Other Rebreather/s: Megalodon Join Date: Aug 2006 Location: Ft. Lauderdale Posts: 1,269	Re: BOV and DPV diving Jeff, Howard and I did a dive the other day in a pretty stiff current. I had to abort my dive for scooter reasons, but I thought I'd let you know how the BOV and scooter worked together. The boat's GPS was registering a 1.6 to 1.9 knot north current with just a slight easterly crosswind. With the Submerge set to prop position 9, the highest, there was incredible flow over my gear. The Drager mask held the BOV in place with no problems what so ever, and there is no jaw fatigue since the five point mask harness distributes the force. Howard was diving his Optima with the BOV mouth piece and half mask. I have dived the BOV without the mask, but not with the scooter. I found the BOV to create jaw fatigue only when swimming against strong currents, and not noticeable in standard conditions. Unfortuneatly, the BOV is really needed in the heavy conditions, and therefore, I have decided to stick with the FFM whenever possible. You may want to talk directly with Howard (Scubadadmiami) and Marc (MarcLaukien) about their use of the Optima with the Golem BOV while scootering. They both have or had the same setup and scooter. As a matter of fact, Marc (now diving a HHCCR) and I are planning to do a scooter dive tomorrow. You are more than welcome to join us! If you want to try the FFM in the pool, let me know. Eric __________________ MEM "Da Pilot" Black holes are where God divided by zero. "If at first you don't succeed, don't dive silent." "Would you mind not shooting at the thermo-nuclear weapons." ~ Vic Deakins "Donkey's kill more people annually than plane crashes."
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26th June 2008, 14:43	#5 (permalink)
Mark Chase I go down for ages Current Rebreather/s: Classic Kiss Other Rebreather/s: Inspiration Classic Join Date: Jan 2005 Location: Kent Posts: 2,561	Re: BOV and DPV diving I have scootered on wrecks with a Golum BOV, i havent noticed it to be an issue. I can rest it on my chest without any mods?? But i have only ever felt the need to do this on long deco or on the boat waiting to get in. Jaw ache from bov's is best dealt with using apropriate mouthpieces or a gag. I use a moulded mouthpiece thats griped by the teath at the back of the jaw. It seems to work well. ATB Mark __________________ Is it supposed to make that noise ? I took my unit to the dive shop and demanded they bolt on every thing that would fit. Join my elite diving teem and get a Tshirt "Doing It Chasey"Hammerhead Eccr Advanced Diving System
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26th June 2008, 14:59	#6 (permalink)
swadiver New Member Current Rebreather/s: Optima Other Rebreather/s: Join Date: May 2006 Location: southeast florida Posts: 94	Re: BOV and DPV diving thanks for the responses, gentlemen. eric would love to dive but that pesky damn job is getting in the way again.
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26th June 2008, 15:26	#7 (permalink)
mempilot What is this..terrafirma? Current Rebreather/s: Megalodon Other Rebreather/s: Megalodon Join Date: Aug 2006 Location: Ft. Lauderdale Posts: 1,269	Re: BOV and DPV diving Quote: (Originally Posted by swadiver) eric would love to dive but that pesky damn job is getting in the way again. Well, there is an imminent solution to that: high oil prices. Come over to the dark side and fly for Big Brother Airlines. What's bad is good if you catch my drift. __________________ MEM "Da Pilot" Black holes are where God divided by zero. "If at first you don't succeed, don't dive silent." "Would you mind not shooting at the thermo-nuclear weapons." ~ Vic Deakins "Donkey's kill more people annually than plane crashes."
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26th June 2008, 17:51	#8 (permalink)
cameron Classic Kiss 124 Current Rebreather/s: Classic Kiss Other Rebreather/s: Join Date: Apr 2005 Location: Toronto, Ontario, Canada Posts: 247	Re: BOV and DPV diving I used to have the KISS BOV but found it absolutely brutal when scootering. I could not do anything over an hour 1/2 without my jaw really hurting. I have fitted the Halcyon BOV to my KISS with some nice sleek streamlined hoses and could not be happier. IMHO you need a chin rest if you are scootering Cam __________________ Reclaim at work and CCR at home, life is good
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26th June 2008, 18:27	#9 (permalink)
mempilot What is this..terrafirma? Current Rebreather/s: Megalodon Other Rebreather/s: Megalodon Join Date: Aug 2006 Location: Ft. Lauderdale Posts: 1,269	Re: BOV and DPV diving Quote: (Originally Posted by cameron) IMHO you need a chin rest if you are scootering Cam Or a FFM. __________________ MEM "Da Pilot" Black holes are where God divided by zero. "If at first you don't succeed, don't dive silent." "Would you mind not shooting at the thermo-nuclear weapons." ~ Vic Deakins "Donkey's kill more people annually than plane crashes."
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26th June 2008, 19:26	#10 (permalink)
lof RebreatherWorld Sponsor Current Rebreather/s: Megalodon Prism Topaz Sport Kiss Classic Kiss MK 15.X Other CCR RB80 / Clone Other SCR Home Build Other Rebreather/s: Other CCR RB80 / Clone Other SCR Home Build Join Date: Jun 2005 Location: USA Posts: 479	Re: BOV and DPV diving I do several hour scooter dives into the current with no jaw fatigue. But then I have a strong jaw or maybe it is the Seacure bite piece. __________________ Jakub Golem Gear ShopKeeper www.golemgear.com
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