NCC.OP.160 Use of headset

(a)Each flight crew member required to be on duty in the flight crew compartment shall wear a headset with boom microphone or equivalent. The headset shall be used as the primary device for voice communications with ATS:

(1)when on the ground:

(i)when receiving the ATC departure clearance via voice communication; and

(ii)when engines are running;

(2)when in flight:

(i)below transition altitude; or

(ii)10 000 ft, whichever is higher; and

(3)whenever deemed necessary by the pilot in command.

(b)In the conditions of (a), the boom microphone or equivalent shall be in a position that permits its use for two-way radio communications.