Chapter 3 - Communications
Communications is an extremely important aspect of surveillance and the various methods of communicating covertly by radio are covered. The different types of radio systems; covert microphones, earpieces and wires are explained together with different types of radio voice procedure and code systems.
- Types of communication equipment
- Mobile and handheld radios
- Antennas & frequencies
- Covert systems
- Radio security
- Brevity code systems
- Radio call signs and networks
- Voice procedure
- Spot Codes
- Encryption
- The click system