Codan NGT VR - Switching off the AES-256 Digital Encryptor

AES-256 digital encryptor option
NGT Transceiver Getting Started Guide 35
Switching off the AES-256 digital encryptor
To switch off the encryptor:
1 Press SEC.
The transceiver responds with two low short beeps and
displays Go Clear. For example:
The channel screen displays that the transceiver is no
longer secure (Clr Voice).