Standards in rules would be nice...
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I don't think there should be a cavern diver certification at all...IMO it should be intro and full (or c1/c2), so I'm a bad person to ask.
There are people who are perfectly content in the daylight zone and don't ever want to see cave... Cavern is an appropriate course for them.
There are people who are perfectly content in the daylight zone and don't ever want to see cave... Cavern is an appropriate course for them.