low air flow in ccr

Question 1

what is low air flow

Answer 1

when system detects dip of oxygen

Question 2

how will it alert you?

Answer 2

buzzer sound for 1 min
and ‘leave LDMR’ sign on

Question 3

what should the last person out of crew rest do?

Answer 3

inform fc

Question 4

when can you return to ccr

Answer 4

only once caps given permission and all indicators off