Twin Scuba Tank
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Twins, Dual Scuba Tank Assembly of Twin Tanks
Live from eBay today, find your twin scuba tank- LISTINGS ENDING SOON
Twins, Dual Scuba Tank Assembly of Twin Tanks
Stainless Steel Wing Nuts 3 8 18 with Washers for Double Twin Tank Set of 2
Time Remaining: 18h 9m
Buy It Now for only: $4.94
1950s US Divers Twin Tank Manifold from Double Hose Dive Regulator SCUBA Diving
Time Remaining: 22h 27m
Vintage US Divers Twin 72s with harness
$50.00 (1 Bid)
Time Remaining: 1d 16h 55m
USDIVERS Scuba Doubles us TWIN Tanks Manifold Valve YOKE 8 1 8 Crossover USA
Time Remaining: 5d 53m
Buy It Now for only: $24.30
Stainless Steel Wing Nuts 5 16 18 with Washers for Double Twin Tank Set of 2
Time Remaining: 8d 3h 32m
Buy It Now for only: $4.94
New Twin Cylinder Hardware Kit For Dive Rite Transpac
Time Remaining: 8d 16h 17m
Buy It Now for only: $130.00
Worthington Steel LP 95 Scuba Twin Tanks Nitrox
Time Remaining: 8d 23h 54m
Buy It Now for only: $700.00
A2 GRADE Scuba Diving Twin Cylinder Band Scuba Tank Bands STAINLESS STEEL
Time Remaining: 9d 17h 8m
Buy It Now for only: $68.29
Dive Rite Manifold for Twin Cylinders
Time Remaining: 9d 22h 30m
Buy It Now for only: $150.00
Twin Tank Bands 2 Wide For 725 Tanks for Technical Scuba Diving
Time Remaining: 10d 12h 56m
Buy It Now for only: $129.95
DACOR Scuba Doubles TWIN Tanks Manifold Valve YOKE 8 1 8 Crossover USA
Time Remaining: 12d 20h 44m
Buy It Now for only: $34.30
Twin PRESSED STEEL TANK CO E Series 120 HP 3000 w OMS Manifold Valve System
Time Remaining: 16d 11h 25m
Buy It Now for only: $773.50
Twin PRESSED STEEL TANK CO E Series 100 HP 3000 w OMS Manifold Valve System
Time Remaining: 16d 11h 33m
Buy It Now for only: $682.50
US Divers Twin Double 2 Tank Valve Manifold for Scuba Diving
Time Remaining: 16d 16h 12m
Buy It Now for only: $34.95
Scuba Tech Diving Stainless Steel Twin Double Tank Mounting Bands Pair
Time Remaining: 19d 19h 19m
Buy It Now for only: $135.98
Zeagle Scuba Diving Stainless Steel Back Plate for Twin Single Tanks
Time Remaining: 19d 21h 55m
Buy It Now for only: $180.95
Zeagle Scuba Diving SS Twin Tank Cylinder Mounting Bands 725 Diameter
Time Remaining: 20d 13h 21m
Buy It Now for only: $365.95
Zeagle Scuba Diving SS Twin Tank Cylinder Mounting Bands 80 Diameter
Time Remaining: 20d 13h 22m
Buy It Now for only: $262.95
Scuba Diving Twin Cylinder Band Scuba Tank Bands SS
Time Remaining: 22d 11h 6m
Buy It Now for only: $67.72
Stainless Steel Scuba Diving Twin Cylinder Tank Band
Time Remaining: 22d 11h 7m
Buy It Now for only: $66.27
Vintage Scuba Dive Twin Double Tank Bands about 7 with Harness Steel 72
Time Remaining: 23d 20h
Buy It Now for only: $65.00
Vintage Double Scuba Tank Valve Twin Valve REGULATOR LOT HOSE GAUGE
Time Remaining: 24d 10h 52m
Buy It Now for only: $141.33
SCUBA TWIN TANK TO BCD BACKPACK ADAPTOR
Time Remaining: 25d 11h 26m
Buy It Now for only: $9.00
ScuBaPro Scuba Diving Twin Jet Fin Black Medium
Time Remaining: 28d 4h 31m
Buy It Now for only: $155.00
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
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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