Hi there -
On a recent short liveaboard trip, there was a beginner diver who ran out of air in about 20 mins every single time when everyone else in the small group still had enough to dive another 30-40 mins. There was just one guide, so no option of diving in separate groups for the rest of the trip. A pity indeed that we did not get to see as much as we could have given that those were all new sites for us and not so convenient to access. What can I do the next time I am stuck in such a situation? Thanks in advance for your advice.