LITTLE KNOWN FACTS ABOUT MARINE VHF RADIO.

Alarm Decibel Level: 70 decibels Throat microphones may also be extremely practical when helmets or respiratory protection is necessary. Several full-facial area SCBA, CABA, SAR Respirator, Elastomeric Respirator, N95 Respirator PAPR, or re-breather masks do not need a provision to get a microphone inside the mask. The throat microphone can be uti