Twin Scuba Tank

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Twins, Dual Scuba Tank Assembly of Twin Tanks

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Dacor Diving Stainless Steel Twin Double Tank Mounting Bands Pair 8 For Rig
Dacor Diving Stainless Steel Twin Double Tank Mounting Bands Pair 8 For Rig
$59.95 (1 Bid)
Time Remaining: 5h 17m

Scubapro Scuba Diving Twin Jet Fin Black Medium
ScuBaPro Scuba Diving Twin Jet Fin Black Medium
$155.00
Time Remaining: 12h 3m
Buy It Now for only: $155.00

Pair of Twin Tank Bands galvanized steel to fit 69 steel tanks 712 New
Pair of Twin Tank Bands galvanized steel to fit 69 steel tanks 712 New
$50.00
Time Remaining: 22h 1m

Stainless Steel A2 Scuba Diving Twin Cylinder Tank Band 725 Diameter
Stainless Steel A2 Scuba Diving Twin Cylinder Tank Band 725 Diameter
$75.96
Time Remaining: 2d 5h 41m
Buy It Now for only: $75.96

Stainless Steel Wing Nuts 3 8 18 with Washers for Double Twin Tank Set of 2
Stainless Steel Wing Nuts 3 8 18 with Washers for Double Twin Tank Set of 2
$4.94
Time Remaining: 3d 1h 46m
Buy It Now for only: $4.94

HALCYON TWINSET BAR MANIFOLD TWIN VALVES SCUBA DIVING DIVER M25X2
HALCYON TWINSET BAR MANIFOLD TWIN VALVES SCUBA DIVING DIVER M25X2
$200.00
Time Remaining: 4d 19h 23m
Buy It Now for only: $200.00

Stainless Steel A2 Scuba Diving Twin Cylinder Tank Band 725 Diameter
Stainless Steel A2 Scuba Diving Twin Cylinder Tank Band 725 Diameter
$65.00
Time Remaining: 6d 20h 38m
Buy It Now for only: $65.00

USDIVERS Scuba Doubles us TWIN Tanks Manifold Valve YOKE 8 1 8 Crossover USA
USDIVERS Scuba Doubles us TWIN Tanks Manifold Valve YOKE 8 1 8 Crossover USA
$24.30
Time Remaining: 7d 8h 25m
Buy It Now for only: $24.30

SCUBA twin tank bands 10L 12L Faber Highest Quality Highland Equivalent
SCUBA twin tank bands 10L 12L Faber Highest Quality Highland Equivalent
$162.96
Time Remaining: 9d 11h 4m
Buy It Now for only: $162.96

Stainless Steel Wing Nuts 5 16 18 with Washers for Double Twin Tank Set of 2
Stainless Steel Wing Nuts 5 16 18 with Washers for Double Twin Tank Set of 2
$4.94
Time Remaining: 10d 11h 10m
Buy It Now for only: $4.94

New Twin Cylinder Hardware Kit For Dive Rite Transpac
New Twin Cylinder Hardware Kit For Dive Rite Transpac
$130.00
Time Remaining: 11d 21m
Buy It Now for only: $130.00

Worthington Steel LP 95 Scuba Twin Tanks Nitrox
Worthington Steel LP 95 Scuba Twin Tanks Nitrox
$700.00
Time Remaining: 11d 7h 32m
Buy It Now for only: $700.00

A2 GRADE Scuba Diving Twin Cylinder Band Scuba Tank Bands STAINLESS STEEL
A2 GRADE Scuba Diving Twin Cylinder Band Scuba Tank Bands STAINLESS STEEL
$69.17
Time Remaining: 12d 41m
Buy It Now for only: $69.17

Twin Tank Bands 2 Wide For 725 Tanks for Technical Scuba Diving
Twin Tank Bands 2 Wide For 725 Tanks for Technical Scuba Diving
$129.95
Time Remaining: 12d 20h 33m
Buy It Now for only: $129.95

Twin PRESSED STEEL TANK CO E Series 100 HP 3442 PSI OMS Manifold Valve System
Twin PRESSED STEEL TANK CO E Series 100 HP 3442 PSI OMS Manifold Valve System
$594.00
Time Remaining: 12d 21h 29m
Buy It Now for only: $594.00

Twin PRESSED STEEL TANK CO E Series 120 HP 3400 w OMS Manifold Valve System
Twin PRESSED STEEL TANK CO E Series 120 HP 3400 w OMS Manifold Valve System
$748.00
Time Remaining: 18d 20h 2m
Buy It Now for only: $748.00

Scuba Tech Diving Stainless Steel Twin Double Tank Mounting Bands Pair
Scuba Tech Diving Stainless Steel Twin Double Tank Mounting Bands Pair
$135.98
Time Remaining: 22d 2h 56m
Buy It Now for only: $135.98

Zeagle Scuba Diving Stainless Steel Back Plate for Twin  Single Tanks
Zeagle Scuba Diving Stainless Steel Back Plate for Twin Single Tanks
$180.95
Time Remaining: 22d 5h 33m
Buy It Now for only: $180.95

Zeagle Scuba Diving SS Twin Tank Cylinder Mounting Bands 725 Diameter
Zeagle Scuba Diving SS Twin Tank Cylinder Mounting Bands 725 Diameter
$365.95
Time Remaining: 22d 20h 59m
Buy It Now for only: $365.95

Zeagle Scuba Diving SS Twin Tank Cylinder Mounting Bands 80 Diameter
Zeagle Scuba Diving SS Twin Tank Cylinder Mounting Bands 80 Diameter
$262.95
Time Remaining: 22d 21h
Buy It Now for only: $262.95

Scuba Diving Twin Cylinder Band Scuba Tank Bands SS
Scuba Diving Twin Cylinder Band Scuba Tank Bands SS
$69.17
Time Remaining: 24d 18h 39m
Buy It Now for only: $69.17

Stainless Steel Scuba Diving Twin Cylinder Tank Band
Stainless Steel Scuba Diving Twin Cylinder Tank Band
$67.70
Time Remaining: 24d 18h 39m
Buy It Now for only: $67.70

Worthington Steel Twin 80s
Worthington Steel Twin 80s
$650.00
Time Remaining: 25d 9h 1m
Buy It Now for only: $650.00

Vintage Scuba Dive Twin Double Tank Bands about 7 with Harness Steel 72
Vintage Scuba Dive Twin Double Tank Bands about 7 with Harness Steel 72
$55.00
Time Remaining: 26d 7h 40m
Buy It Now for only: $55.00



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twin scuba tank
How long would it take a trawler to complete a journey of 167,393.671 miles (269,394 km)?

The trawler in question has the following equipment: 1998 twin 855NTA 400 hp Cummins, 5:1 Tonaco transmissions, 4 inch shafts, 54” four blade SS wheels in kort nozzles. 2006 40kw Northern lights generator, 30kw Detroit Diesel generator. All keel cooled and dry exhaust. 250 gal sewage tank with pump out. 3hp bildge pump, 1.5 hp SW washdown pump, 1.5 hp FW pump. 12V batteries, 24V batteries, 32V batteries. 3000 psi SCUBA compressor.
How many days would it take, and how many stops would it need to make to complete the journey?

yeah, you know that none of what you've obviously copy and pasted matters when measuring trip time? you need distance and speed to calculate how long to travel from point A to point B, of which you have not supplied to us thus it's impossible for us to guesstimate it. for how many stops needed, you'd need to tell us how much fuel the engine consumes per hour and how large the fuel tanks are, also impossible to guesstimate without this info. now that I've clarified this, here we go:

but let's play around with this.....I'd guesstimate 12 knots for a trawler's top speed, 41,690/11,000 liter/gallon fuel tanks and the motors burn 132.4/35.0 liters/gallons per hour, each knot is 1.8 km/hr, now we can do some math.
269,394km/1.8kmph = 149,663.33 nautical miles
149,663.33nmi/12 knots = 12471.94 hours
12471.94hrs/24hrs = 519.66 days
519.66 days or 1 year, 6 months and a few days, give or take a week if you could keep a constant pace, which you couldn't since you would need to fuel, resupply and shelter from bad weather, so I'd say more in the realm of a year and seven months to year and ten months would be a generous estimate.
for how many stops you'd need? here's my calculations:
US imperial units:
11,000 gallons/35gph = 314.285 hours of run time at 75% power(aka maximum reasonable continuous run time)
12471.94hrs(total time for entire trip)/314.285hrs(between stops) = 38
I estimate 38-40 stops during the trip, minimum. plan accordingly :D
PS: there's a reason only the insanely rich and the government can plan and do these trips in comfort, they're expensive to run. imagine trying to fuel for even the lowest price in the US at the moment, $2.85/g, that's $31,350 each stop for fuel alone, not including other supplies, so the total fuel cost would be $1,191,300-$1,254,000 for fuel for the whole trip!
something I didn't think about, water. if you don't have a water maker onboard, your going to be making a lot more stops then 40 during the trip. each person on average uses 151.7 gallons of fresh water a day in the US for drinking, making food, washing themselves, for the toilet, ect. so lets apply this to your boat, 1000 gallon water capacity(says in the specs from the link below), that means you can only go 6.5 days before absolutely needing to refill the tank, for ONE PERSON! divide it by how many people onboard, you aren't going far between fillings.
PS: people, when circumnavigating the globe, you can't drive a boat through land, so you need to go around, thus lengthening the trip, come on, no one thought of that?

Why You Should Choose the Right Scuba Equipment

Diving is an exciting hobby. It can also be extremely dangerous if you are not properly trained in safe diving techniques. The risks are clear to see, you are swimming around under water a long way from your natural air supply. You are relying on equipment to keep you alive a long way from safety. You must be comfortable or you will find it difficult to concentrate on important safety aspects of the dive.

In my experience uncomfortable gear is one of the main causes of problems in diving. I cannot remember the number of times I have seen a student shoot to the surface in a panic because of a leaking face mask. There are also many occasions I have seen newly qualified divers leave the sport simply as a result of not enjoying their training using the uncomfortable and usually ill fitting club gear provided. Even experienced divers sometimes become disillusioned as a result of an expensive purchase that turns out to be painful to use.

I have enjoyed diving as a hobby for many years. Last year I decided to try some more adventurous diving and needed to investigate the different equipment that I would need for the deeper and longer dives I wanted to do. I researched the subject as well as chatting to my diver friends. It seemed that the next move would be to upgrade my single cylinder equipment to a twin cylinder set up. This would provide a number of benefits for the different dives being planned.

- Twin tanks mean that you have two separate supplies of breathing gas. This means an extra safety factor over the single tank set up in case of a failure.

- A twin tank set up is better balanced than a single cylinder with pony attached leading to better comfort and trim in the water.

- You are able to dive with a bigger gas supply than when using a single cylinder.

I was persuaded to buy a standard twin 12 litre set. When I started using it I found that it was very comfortable in the water and I was pleased at the additional safety factor twin tanks gave me. However, I was very uncomfortable carrying 40 kilos of equipment on my back when I was out of the water. Also, I realized that I was carrying more gas than I needed for most of the dives we were doing. I had not considered my own needs properly and had listened to others giving advice that although was well intended, did not suit me.

After some more research, the answer was simple, I needed twin 7 litre tanks to which I could add an additional side slung decompression cylinder for the deepest and longest dives I might consider doing. With this equipment I am happier, feel more comfortable, and can concentrate on safe diving and having a great time exploring the new experience of diving a bit deeper and for a bit longer than before. The issue of diving safely is paramount, and you must think of your own needs in relation to the diving you intend doing, not what looks good to others.

About the Author

Mark Jenner is a Dive Leader and BSAC Open Water Instructor. He has been diving regularly for over 3o years in the UK, the Mediterranean and the Red Sea. Mark has written numerous articles on the sport and his scuba diving web site provides a wealth of free advice and information on the subject.

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