Dr. Kenny Broad is conducting a pre-breathe on his Megalodon rebreather at Bahamas Underground in Abaco. I wanted to share this shot for a couple of reasons. First, it shows the proper conduct of the pre-breathe, with the nose plugged. This ensures that the check catches any CO2 issues. If your nose is not blocked, then your brain will compensate and allow you to unknowingly suck in some fresh air to make up for the rising PCO2.
The second reason I have included this shot is because it shows an inexpensive way to weight down your breathing loop if it is in your field of vision. Loop weights are a great solution, but if you are in the field and need a quick fix, buy a small spool of Silver Solder and spiral it around the breathing hoses. Trim the ends to ensure you don't damage the rubber. -- Jill Heinerth
The second reason I have included this shot is because it shows an inexpensive way to weight down your breathing loop if it is in your field of vision. Loop weights are a great solution, but if you are in the field and need a quick fix, buy a small spool of Silver Solder and spiral it around the breathing hoses. Trim the ends to ensure you don't damage the rubber. -- Jill Heinerth
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