Which task is NOT the responsibility of the GMDSS Radio Operator?

A
Inspecting and cleaning the SART's container, and clearing the immediate storage area of any debris or obstacles.
B
Measuring the SART's transmitted frequency.
C
Placing the SART in the test mode and verifying that the nearby PPI shows concentric circles.
D
Ensuring the SART's batteries are replaced before their expiration date.
E