warjarrett

Leaving the secondary on position 2 was covered on the first day of my training. But on each subsequent day, I was taught to ask questions, think for myself, and continue to grow in my understanding of safety and equipment maintenance. I was NEVER taught to blindly follow rules-of-thumb without understanding why. So, yes, if the secondary gets jostled, its mechanism is better protected from damage in one of the three positions 1, 2 or 3. There is NO REASON to always leave it on 2. Position 1 or 3 is just as good for protection, and changing this position occasionally will allow you to more evenly age the sensors, without having to switch sensors around inside the head. But my slightly greater knowledge now (compared to graduation day), that I have achieved from continuing to think for myself AFTER training AGREES with Chett's suggestion: as long as you are only storing the rebreather, there is no reason to stress an oxygen sensor by leaving one under load from the secondary. There is very good reason to switch the secondary to S, if the unit is to be stored for a while. Just dont forget to switch it to a sensor position before transporting it. Now, does anyone really disagree with this?