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You always need to have a PO2 of the diluent lower than 1.3 to flush, to bring a PO2 down when needed. That is not special to gue. Remember other agencies already teached ccr long time before gue adopted a ccr. And all the bailout/problem solve strategies are teached by all agencies, even the...

I paid 150 for a complete recreational set with the Scubapro MK17 as first stage and 2 good second stages, 1 bcd, wetsuit, boots, fins, and also 1 12liter steel cylinder (out of test, but I am not worried about that). So 1200 is way too much. Old wetsuits, boots and fins are worth nothing. The...

yes, but if you have just a 10 liter 200 bar, then it is less than an ali80 or ali12 liter 200 bars. The din connection is not strange, everybody dives here din. BUT, and that is a big BUT. I have a key for our clubcompressor. This compressor gives 200 bars, also DIN connection. But the din...

No, the drysuit, and also sidemount are in my opinion the 'could be usefull' courses. Not required, but can be usefull. So I don't see that they are useless, but they are not needed for every diver. Maybe it takes some more time to learn it yourself, but also that is not always true if you go...

And the need of training is very very questionable. For myself I don't need training for this, I will be able to learn it in 1 dive, for sure. It is no rocketscience. It looks like diving a drysuit, a course can be ok if you are unsure, but is not a requirement. And I read about 2lbs positive...

I always show 1 of my technical instructor certs when they ask (I have only once showed them in real, on registration form I fill in instructor in everything: trimix, cave oc and ccr, sidemount, and instructor trainer and then it is always fine, with 3200+ dives and last dives 2 days before...

I would have been offended if I had to do a checkdive and had to pay for it. I know a divecenter in Malta who has this policy, pay 40 euro for a checkdive for technical diving to swim 30 minutes (not 31 or 29, they know exactly the 30 minute round) with a twinset and stages over their housereef...

A checkdive that must take more than 30 seconds must be free and done before the normal dives start, so there is no waiste of time and money for the customer. Otherwise a checkdive is not done. If you observe a diver with kitting up, then you know the most important things already. And in the...

It was before the problems there. So then it was no issue.

I have not that good experience with seabees, they were very very expensive and offered the same 3 dives to Phiphi as a Russian Company offered, but for way less money. The Russian company did their job very well. If you can save 30 euro a day, that is a lot.

Ok, as a cave dive instructor I see different divers. Some really can do all the courses in 1 week. I did the same myself. This was absolutely no zero-to-hero as some will say, I was a diver that could do it. So I was ready for it. If I get good students I always advice them to do all at once...

Just back from Moalboal and Malapascua. In Moalboal no single muckdivesite done. We have done 2 times Pescador Island (the side with most current is really good, the other is average, that is the side most divers do with the 'caves'. We have further done the sardines and another wall with a very...

If you want to see them 100%, then Oslob is the place to be. yes, they feed the sharks a little bit, but further they take real care of the sharks and all is regulated so the sharks won't get any harm. Also their natural behaviour is not changed by the feeding. I can recommend this place, was...

It depends on the situation. If I go to Mexico and want to take pictures, I put on the way in some cookies on the line for interesting photospots and write down the time in and amount of gas used till cookie 'X'. This has a reason, because on the way back I start taking pictures and sometimes I...

Ok, from my experience as instructor, there are some things that COULD have happened, but I wasn't the instructor, so it is just what can happen. You had a group of 4. This is what is allowed by standards. The 3 days is possible to finish a course for most divers. No, you are not a good diver...

Some rebreathers are made as hobby project and you can buy them without any course. There is also no unit specific course for such units. I have dived 1 of such machines and wow, I am still alive. But ok, I am already a certified ccr diver. If you understand the principles of ccr diving, it is...

The focuspoint from the TG is very big. This means with very small things it can take the surroundings instead of what you want. But I also see a fish as subject and they are hard to focus on. So try with something that is not moving. With fish I also have quite a lot of unsharp pictures with...

If a shop wants to see certs depends for a big amount on how you arrive there and how you move/behave/talk. I have been to several divecenters and most times nobody asked for a c-card where friends had to show them. Last august in the UK, nobody asked for a card, nor for my experience, nor if...

I find them very very heavy and that is the reason I am very worried about buying these. I also need more lift then with my arms of the camera setup.

Read my post and read the international standards. It is really NOW 30m, so older certs are 40 or 60m, but if you do 2* now, the 40m can only be reached with a decompression cert. No, that is not true. In my country, the CMAS certs are iso certified too. Here you can find it, it is in Dutch...