The ninth instruction for the D.E.P.A.R.T.M.E.N.T. Stage 4 Training Module. A transcript appears below. If you require clarification, please visit the FOR YOUR EARS ONLY information page.

Agents can often scope out their environments undetected by utilising reflective surfaces. Find one.

Use your device to send a demonstration of your covert observance skills, transmitting using the code that you really should have memorised by now.

Do I have to tell you again?