Where has DIN been required?

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I've dived Europe, Turkey, Indonesia, Thailand, Egypt - the cylinders have always been Pro valves and I don't recall seeing anyone with yoke 1st stages. My 5 regs are all DIN.
 
I have no idea where that would be. Check my profile to see where I have dived. For recreational diving, yoke has been the norm everywhere I have gone.

I have never dived in Europe.
Europe and Middle East :) But I suspect most shops in destinations like Malta or Egypt would have an insert to accommodate yoke. But a vast majority divers will be using DIN.

Oh you might even encounter an oddity in the form of M26 :shakehead: instead of M25 for nitrox/oxygen in special places.
 
If you go with DIN, a DIN-to-yoke converter is about $25. If you go with yoke, a yoke-to-DIN converter is closer to $100. So I figured DIN made more sense on those grounds, and went with DIN regs and bought the DIN-to-yoke converter. I always bring the converter, as well as hex keys (Allen wrenches) in a few sizes for removing Pro valve plugs. All of the tanks I own have Pro valves with removable plugs, so I can easily lend them to folks with yoke regs. This setup works well for me.

However, I have never dived in a place where I was glad to have DIN regs, and I have dived in many places where it was unhelpful. All of my diving is in the US mainland, Hawaii, and the Caribbean, where yoke is much more common. If I dived often in a place where DIN was much more common, I would recommend it. But if I could do all it over, I think I'd have been better off going with yoke. Only a little bit better off though, because at the end of the day, using the converter is really not a big deal.
 
If you go with DIN, a DIN-to-yoke converter is about $25. If you go with yoke, a yoke-to-DIN converter is closer to $100. So I figured DIN made more sense on those grounds, and went with DIN regs and bought the DIN-to-yoke converter. I always bring the converter, as well as hex keys (Allen wrenches) in a few sizes for removing Pro valve plugs. All of the tanks I own have Pro valves with removable plugs, so I can easily lend them to folks with yoke regs. This setup works well for me.

However, I have never dived in a place where I was glad to have DIN regs, and I have dived in many places where it was unhelpful. All of my diving is in the US mainland, Hawaii, and the Caribbean, where yoke is much more common. If I dived often in a place where DIN was much more common, I would recommend it. But if I could do all it over, I think I'd have been better off going with yoke. Only a little bit better off though, because at the end of the day, using the converter is really not a big deal.
Until you get to a place that rarely removes the "doughnut" converter, and then it is stuck in and you can't use your DIN reg.
 
When my son and I went to Cozumel in 2006, I believe Aldora's HP steel tanks only took DIN. I may be remembering this incorrectly. Other than that, I have never been to a land or liveaboard operator that has not taken yoke regs, of course, most take DIN also. Personally, I dislike using a yoke adaptor.

I dived a DIN regulator for many years and still have it, use it on my pony. I use a yoke regulator these days. I rent my tanks everywhere I go.
 
https://www.shearwater.com/products/teric/

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