The Frozen Beaufort Sea: Part 3

Training for diving in the arctic focuses on emergency preparedness. Here failures can come in many forms.

This entry will focus on frozen regulators or running out of air.

Frozen Regulators issues usually come in two forms.

1. A regulator frozen open and free flowing. With no direct route to the surface (and air) this can spell disaster if you don’t know how to handle this emergency.

2. A frozen closed regulator which gives you no air. Again with no direct route to the surface (and air) this can spell disaster if you don’t know how to handle this emergency.  There are other reasons a diver may not have sufficient air and the emergency procedures for dealing with these are the same as with a frozen regulator.

Arctic divers utilizing full face masks usually have two backup methods of solving this issue unassisted. The first is a redundant air source that is controlled through a Manifold or gas switching Block. Both the primary and secondary air supplies are connected to this block and from this block run one hose to the mask itself. In the event of a first stage failure this device is simply switched over and air will flow from the redundant air tank to the mask.

If the issue resides in the regulator or mask itself then the procedure to deal with it becomes more difficult. This is when we implement a procedure commonly referred to as a “Bail Out. ” A Bail out is where a diver must remove their full face mask underwater and replace it with what is customarily called an “octopus” regulator and a more conventional scuba mask. An “octopus regulator” is simply a conventional regulator that is held in reserve in case of emergency.

The difficulties in performing this maneuver can be many. First, by the time a diver recognizes that they need to perform this maneuver they have already been without air for the period of time in which it took to try the manifold switching maneuver. Air is now becoming very necessary. Second, the water is below freezing in temperature and a diver’s face is several degrees above. When the mask is removed Ice cold water floods the mask. Water often bubbles up inside the nostrils making it hard to breathe after you get the octopus regulator in your mouth.

3. With your face beginning to freeze, your eyes (most likely) closed and in crucial need of air you have to find and deploy the octopus.

4. Seal your now freezing lips to the regulator and breathe. You will most likely take several breaths before taking the time to find your mask. Putting it on your face and clearing it so you can once again see.

If this all comes together successfully it is now time to end the dive and exit the water. If not then you may have to rely on your buddy to supply you with the necessary air and support to get you out of the water in time.

Keep in mind the other issues that may be facing you.

1. The distance between you and the ice hole.
2. Your buoyancy while performing this entire procedure.
3. Decompression or necessary safety stops.
4. Amount of air in the redundant tank.
5. Personal stress related both air consumption as well as every other issue.