Even though DCS might seem subtle, it could be serious

We were in the Maldives for a seven-day liveaboard. Almost all the dives we did were deep, the currents were running, and often we found ourselves finning into them as we followed the guides, on the lookout for the sharks and rays this remarkable atoll is famous for. The trip was taking place during the rainy season, and we had already surfaced a few times in heavy downpours, with visibility on the surface reduced to a few metres.

SWIMMING FOR SAFETY

On the fifth day, we did two dives, and by about 4pm we were ready to jump in for number three. The water was soupy, green. Bottoming out at around 38 metres, we swam along the outer reef towards the entrance to the channel, which we approached from below the lip that marks the passage into the lagoon.

We ascended slowly up the lip to about 26 metres, feeling the strength of the current increasing as we climbed. But it was going the wrong way, not into the lagoon where the boat would meet us, but out to the open ocean. And it was very strong. Our regulators were rattling in our mouths, and as we cleared the top of the lip, we had to hold onto the rocky substrate to keep ourselves from being pulled off the reef.

The guide called the dive, instructing everyone to start the ascent. We let go and the reef disappeared from view in a matter of seconds. It took us at least eight minutes to reach the surface, all of us making conservative safety stops on the way.

By the time we hit the surface, the current had pulled us a long way from the atoll. The boat, waiting for us in the prearranged spot, was now just a speck on the horizon. It was about 4.45pm, and we had about an hour and half of daylight left. Looking to the west, a squall was fast approaching. We calculated that we had about 20 minutes for the boat to pick us up before the rain hit, closing out the visibility and making it impossible for us to be seen.

With every second we were drifting further out into the Indian Ocean. All of us had our SMBs up, but the boat was too far away to spot them. We were finning in an attempt to remain where