The Following Is An Excerpt from “Danger Close, Mission: Undetected”
Mirroring Communication
Upon disposal of a sentry, many options and materials are available to you. You have obtained their uniform, tactical gear, communication equipment (radio), weapons, and in some cases even vital information.
During surveillance, you should end up within earshot of a sentry or two. Pay very close attention to how the radio checks are conducted. There are several types of radio transmission methods that the enemy may utilize. First, is when the Command Post calls every hour or so, with something to the effect of, “All posts, radio check.” Each post, in order, will answer back.
“Post One, All Clear.”
“Post Two, All Clear.”
And so on.
Second is when, at a specified time, the sentry
will call in with an “All Secure” or whatever is pre-determined. It may also get
complicated if there is a code or series of numbers that is integrated into the
call. For example, some units have each sentry use their personal identification
number along with the “All Secure”. And, of course, Command will have that
information readily available; such as a wallboard with the post number,
sentry’s name, ID number, and other pertinent information. 
This is where it
becomes vital for you to pay close attention to what the sentry is saying over
the Net, and how each sentry’s scheduled call is performed.
If you are fortunate enough to know the language
fluently, you may be able to answer during a radio check from the sentry’s
command post, buying you more time to operate after you have disposed of the
sentry. However, in the case that you do not know the language, it is very
important to pay close attention when you are performing surveillance. You may
notice a consistent answer with each radio check. Even if you don’t understand
the dialect or language, you should still be able to repeat the sound or
wording. If you must, write it down in a way that makes sense to you; however
you hear those words, including accent and tone/pitch, would be repeated exactly
as it was heard from the sentry. An example would be Serbian; Sveje Ukloniti
means “All Clear” which you are likely to hear a local Sentry say during a radio
check. You would hear it as ‘svaiya ooklaneetee’, which is exactly how
you would write it, as well as memorizing it and practicing it so that when the
time comes to speak it over the Radio, you do not hesitate, and you have already
perfected the art of mimicking the target’s voice. Keep in mind that pitch and
tone of the voice is just as important as the words you are speaking. Also keep
track of time checks, as you may have to report in rather than simply respond to
Command Post’s call.