Our pneumatic drill, which runs off of the compressed air from a scuba tank and down a long hose to 20m depth, is proving to be difficult to use in the extreme current. We push on and devise new gear for holding the air hose in place while we work so the drill doesn’t get carried away. In extreme conditions like this teamwork is key, and being able to communicate well underwater in a split second is crucial. This underwater communication gets better the more you dive with your dive buddies and after being in some tough situations with the current and the equipment, we have all become really good at understanding each other underwater, even with just a glance or a facial expression.