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I did with temporary caps, with absolutely no problems.

Thanks for sharing!

Changing visibility actually can even add to a dive video, in my opinion.

Hyoscine is just another word for scopolamine, yes.

Dry mouth is I think unavoidable for scopolamine, and anticholinergics in general...

Thanks for sharing!

The points about the salinity are true. What does complicate an exact comparison ("why X kg more instead of only Y kg according to maths?") is probably that other factors (equipment, tank, dive profile) will typically change when on travel...

I am fascinated no end by the mantas making underwater loopings ;)

Thanks for sharing!

The two double ender technique I will have to try out!

Rite of passage :wink:

I personally would not see this as a near death experience. I can imagine it must have been stressing and a negative experience subjectively, and it may be (although impossible to judge for me from a distance) mistakes were made. But in the end you and the DM managed to bring the dive to an end...

Should maybe have quoted, yes. I did not expect something this trivial to trigger such a strong reaction...

Tursiops, I was actually replying directly to "I can't see it catching on." by Graeme Fraser...

...come on. Of course I manage to teach the hand signals. I thought it was very clear that my comment was poking fun at the fact that first time divers sometimes mix this up, a phenomenon that probably most of us have witnessed. Without immediately resulting in the destruction of the Universe.

To change the perception of the entire non-diving world of this signal will be exceedingly hard, I fear. We have this quite often on try scuba dives: Even though the briefing explains what the "thumbs up" mean in the diving world, people use it the way they often have their entire lives. That is...

Yeah, very high chance to be mistaken for "I am doing great, buddy!"

OK so if diving without a guide, just substitute the word "guide" for "buddy". Point is, one will manage to communicate this, I am quite sure. Even more as unplanned deco in the vast majority of cases just means a few minutes at 3m that vanish anyhow on ascent.

Well, but in case of accidentally (for whatever reason) incurring a deco obligation, it will suffice that the guide communicates to stop for some given time. I do not think it is a big problem not to teach a specific sign in OWD courses to be honest.

Seems I follow the majority here ;)