Twin Transmitters for Twin Cylinders?
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- čas přidán 15. 06. 2024
- @m33no49
#askmark Hi Mark about twin backmount do I need two transmitters or one is enough. i know it's easy with sidemount one transmitter for each tank. I can't find any answer on the web hoping you might help me.
#scuba #scubadiving #scubadiver
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#askmark
What do you think about Circular Wing vs Horseshoe Wing for diving with doubles and stage?
I loved the circular wing for single-cylinder recreational, and recently did the trimix course, which required diving with doubles and carrying a stage - during the course, I dived with a horseshoe wing, and it took some time learn to balance the bubble and stay in good trim.
Which style of wing do you prefer for diving with stages on the side and how do you keep the trim?
Love the channel - keep up the good work :)
In my opinion, I think circular are better for trim and buoyancy. Horseshoe style wings are older and more difficult for trim.
Donuts win for me. It can be quite hard to find horseshoe wings now as their popularity has plummeted.
The only benefits are that you can trap some buoyancy on one side a bit more easily to counteract stages on one side of you. And in some cases it can help prevent damage at the bottom when standing your BCD up as the bottom of your cylinders or rebreather can sit on top of the wing.
Donuts tend to be the most popular now and as long as you're weighted correctly you shouldn't need too much gas in your BCD and you can always adjust the location of your lead to account for any inbalance. I also tend to use my drysuit more than my BCD underwater to adjust for buoyancy.
Thanks!
#askmark if you are a former diving instructor, why did you quit and what is it that you do now for a living?
There were a few reasons I stopped teaching. The first was the money and job progression. It wasn't something that I could see retiring comfortably on and if my health ever declined I would need another skill to fall back on. There is always the looming chance that something may happen to a student under your care that a court might deem your fault. There have been cases where Instructors have been with other divers who have had an accident in the water and some blame falls on their shoulders even if they did everything correctly.
Now I work for Scuba Diver Magazine and I focus on creating advice videos and product reviews
#AskMark owning your own air compressor ever a good idea for a hobbyist diver? Are there any small enough units that would make sense for a person to own? Or is the acquisition + operational costs simply never justified?
You can get small single phase 13/16A units for about £1500-2500, but you'll need somewhere to plug these in or you'll have to invest in an inverter generator to power them. Someone I dive with bought himself one, but imo you are better off joining a local club (BSAC for UK) which usually gets you an air ticket for the year in with membership.
You can also get portable compressors hooked up to either a 2-stroke or 4-stroke petrol engine (lawnmower engines usually), but these come with the cost of servicing the engines.
You also need to replace the filter cartridges after so many hours, typically 12. These cost about £40 a pop.
You need to weigh up the investment and running costs against the cost of your air fills. I've known divers that have a compressor and O2 built into their van so they can top up their cylinders on the go. But, I've also known divers to leave a dive site, drive to another dive center to get a cheaper fill and drive back again. What little they saved on fills they spent on fuel and time...
Personally, I've never had a problem paying the small amount for an air fill, it helps the LDC a little and you need to get a lot of diving in before you start seeing any savings.
One big reason why you might consider one is for remote diving. If you regularly dive far from a compressor then the fuel and time costs add up and it can be convenient to fill your own.
#askmark what do you think about the latest push for recreational CCR with the DiveTalk GO (manufacturered by KISS). Apparently it will be probably the cheapest unit on the market and it is also being allowed for use with Trimix.
The last push into this market was probably that Mares Horizon SCR (manufactured by Revo) which is as good as a SCR can be and has the might of SSI behind it... Do you see the DiveTalk GO winning where the Horizon has stalled?
We've seen recreational rebreathers before. I added up the costs of a full twinset and a SCR when the Hollis Explorer was released and they were comparable for the unit itself. Most new divers weigh up the cost of buying their own mask though, and it's a long time before they buy a regulator. I don't think you'll find many new divers who will buy their own rebreather so, they'll need to rent wherever they go.
The problem comes that most divers don't seem to like change. Unless training agencies can make rebreathers standard for new divers, they will only appeal to a very small demographic. If you go to a random dive center anywhere in the world, you'll be taught open circuit. Every Instructor out there can teach open circuit and every dive center will have open circuit equipment.
It will take a monumental amount of time, money and training to get enough Instructors and units out there to make them mainstream. And for established open circuit divers, if they're interested in rebreathers, they'll probably go straight to CCR.
I would love to be wrong about this but, I think it will be a while before we see rebreathers as common as open circuit.
#askmark Do you think it worth waiting for Mares Quad CI or to jump straight in to Apeks DSX (750 vs 1000€ with transmitters). Since Aqualung owns Apeks and have some financial issues is it good to assume that we won't see any firmware updates of their dive computer (e.g. adding SurfGF)? I know that Shearwater is the answer to most questions about dive comps, but really i would need to pay almost 1500€ for perdix 2 with transmitter, so the price difference is huge in EU.
#askmark
What is the average life expectancy of a 1st and / or 2nd stage? At which point would you recommend replacing your regulators?
As long as it's serviced regularly, a 1st or 2nd stage can last decades. End of life is when you ( or more likely your LDS) can no longer get the required spare parts.
Most regulators are replaced not because they're beyond repair, but because something more fashionable is wanted!
+1 to the above. And its even more difficult to wear off the first stage. Most likely the diving tech will simply move on before you will see the first stage fail. I mean for one you can find ancient diving systems from like the Soviets that are technically still functional, its just that there is none who can service them and you cannot get any parts for it anymore, obviously, but they still work.
There are people who use first and second stages that are decades old. They can update, but they don't need to. I think there are quite old designs now that are still being sold brand new because they got the formula right and there's been no need to update...I'd argue there's no major differences between designs from the early 2000s until today so that makes them at least 20 years old already (eg. Scubapro Mk25).
Having said that divers like Will/Bill Hogarth Main kept the same regulators with "old" designs and technology from the 70s up into the late 2000s even though there were newer better technology readily available. He had a obsession for having fewer "failure points" so maybe his old regs one or two less o-rings or something... But they worked and he did (maybe still does?) some fairly serious cave dives.
Yeah, as the others have said: if you look after your regulators and can get spares they can last for decades. We used to see 10-20 YO regulators come in for a service with no issues.
The tricky part is when the manufacturer stops making replacement parts. AFAIK they need to continue to produce spares for 7 years after they discontinue a model, then it's down to finding a dive center that still has stock in decent conditions. A good service tech might be able to cobble-together a service kit with the right size O-rings and the right spec parts from newer models but, that can be pot-luck.
Unless you feel like treating yourself to something new or your BCD/cylinder set up has changed and a different regulator design is required, I'd continue to use my regulator until I couldn't get an essential replacement part.
#askmark I have really skinny wrists and when I press the button to add air to my drysuit the tendons create a channel which causes water to leak through so I keep ending dives with soggy arms. How do you suggest I solve this issue? I've tried pulling the wrist seal higher but the point at which the tendons stop creating a channel is about 70% of the way up my forearms.
My first thought is something called BioSeal. It's a very soft rubbery collar that sits under your wrist seal. Because it's so soft it molds to the contours of your wrist and fills those gaps.
Otherwise dry gloves may be an option. A dry glove system will keep water away from the seal and keep your hands warm
#AskMark can you introduce the full face masks? Always been curious when would it make sense to have/use one? Can you walk through the key pros & cons, key use cases and add your own opinion - what do you think about them, have you tried, do you like to dive with them?
Ideally, you should get specific training because it is a new form of diving with particular procedures.
As with most aspects of diving there is no "Scuba-Police" that will tell you off or prevent you from altering your equipment *but*, your chances of hurting yourself and others do increase with unfamiliar setups.
#AskMark what's the deal with DPV cost? Why do those things cost like real motorbikes/scooters (i.e. 10-14k) when clearly there aren't that many parts and they are quite simple in their build? Is that just a supply/demand issue or are those costs actually justified somehow?
I think it's partially an economy of scale thing. They don't make that many of a particular model, and those parts largely have to come from the same company rather than being spread out across multiple companies all with their own specialisation and scales (eg. Bosch is a common OEM). A lot more cars and motorbikes are made and they share a lot more of the same parts which brings cost down.
Also, I think some of the price is "because they can". If you're looking at an exploration grade Seacraft DPV they're gonna change exploration grade prices... Even though there are electric cars the same price!
Electronics + Moving Parts + Underwater = a real nightmare. DPVs are expensive but, I've played with enough of the cheap ones to know just how mediocre cheap ones are and how the smallest amount of water that finds it's way inside can cause chaos.
You're paying for the precision engineering and materials. There is also an element of limited production numbers, they're not making 1000's of them so they can't benefit from bulk savings and that cost gets pushed onto the consumer.