Which of the following is one of the three principles of air management?

• A. Keep a constant check on time
• B. Know your point of no return
• C. Always move with the buddy
• D. Limit air consumption by speaking less

Answer: (B)

In air management, the key idea is to know when you must turn back to stay safe. Knowing your point of no return means you understand how much air you have left and how far you are from a safe exit, so you can decide to retreat before you run out. This concept ties together your remaining air, the distance to the exit, and the time it will take to get back, giving you a clear threshold to act on. It keeps you disciplined about preserving a reserve for the trip back and, if needed, for assisting a partner.

Seeing your air as a finite budget, you constantly compare what you have with what you still need to complete the task and return to safety. That awareness is what lets you stop pushing deeper when you’re approaching that limit, rather than pushing ahead until you’re trapped.

Other options describe good safety habits in general or misinterpret air care. Keeping a close eye on time is helpful, but it isn’t the specific principle the question targets. Moving with a buddy is important safety practice, but it doesn’t address air quantity and exit planning by itself. Limiting air use by speaking less isn’t a reliable or safe rule, since essential communication often saves lives.