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
TWIN TANK BANDS for steel 95s or 104s
Time Remaining: 1h 27m
Buy It Now for only: $89.67
Vintage ScuBaPro Twin Doubles 72 Rig Manifold Tank Bands Scuba Diving EXC
Time Remaining: 11h 41m
Scubapro Scuba Twin Jet Fin Medium Black
Time Remaining: 1d 22h 4m
Buy It Now for only: $169.00
US Divers Twin Tank Manifold
Time Remaining: 1d 23h 42m
Buy It Now for only: $130.00
VINTAGE SPORTSWAYS SCUBA Diving TWIN Tank Manifold Single outlet with J valve
Time Remaining: 2d 10h 53m
Classic US Divers Double Scuba Tank Valve Twin Valve with Reserve
Time Remaining: 2d 21h 54m
Vintage Scuba Twin Tanks Manifold Bands Skin Diving
Time Remaining: 2d 22h 19m
Buy It Now for only: $200.00
Small Twin Scuba Tanks Dual Manifold Bands Vintage Harness
$100.00 (1 Bid)
Time Remaining: 2d 22h 29m
US DIVERS AQUA LUNG TWIN MANIFOLD J VALVE
Time Remaining: 3d 10h 47m
Zeagle Scuba Diving Stainless Steel Back Plate for Twin Single Tanks
Time Remaining: 3d 23h 23m
Buy It Now for only: $173.98
Zeagle Scuba Diving SS Twin Tank Cylinder Mounting Bands 725 Diameter
Time Remaining: 4d 14h 49m
Buy It Now for only: $255.98
Zeagle Scuba Diving SS Twin Tank Cylinder Mounting Bands 80 Diameter
Time Remaining: 4d 14h 50m
Buy It Now for only: $255.98
Stainless Steel Wing Nuts 3 8 18 with Washers for Double Twin Tank Set of 2
Time Remaining: 5d 16h 6m
Buy It Now for only: $4.94
Nemrod Professional J 3 4 Manifold Scuba Dive Double Tank Twin 2 Regulator Solid
Time Remaining: 6d 13h 49m
Buy It Now for only: $155.00
Zeagle 725 inch Twin Cylinder Bands New
Time Remaining: 7d 15h 30m
Buy It Now for only: $209.00
HALYCON TWINSET BAR MANIFOLD TWIN VALVES SCUBA DIVING DIVER M25X2
Time Remaining: 10d 11h 44m
Buy It Now for only: $300.00
Scuba Divers HEAVY DUTY Twin Locking PONY CYLINDER CLAMP with Bands
Time Remaining: 12d 9h 57m
Buy It Now for only: $147.95
Zeagle 725 inch Twin Cylinder Bands
Time Remaining: 14d 16h 7m
Buy It Now for only: $185.00
1963 WHITE STAG COMPANY SCUBA SKIN DIVER DIVING AD SEA LUNG REGULATOR TWIN TANKS
Time Remaining: 16d 1h 27m
Buy It Now for only: $7.49
TWIN 80 CUBIC FT ALUM TANKS WITH BACKPACK
Time Remaining: 20d 23h 36m
Buy It Now for only: $275.00
Stainless Steel Wing Nuts 5 16 18 with Washers for Double Twin Tank Set of 2
Time Remaining: 22d 5h
Buy It Now for only: $4.94
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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