Saturday, 23 September 2023, 12:18 PM
Site: eGMDSS E-learning system
Course: Long Range Certificate Course (LRC)
Glossary: Glossary


High frequency - same mean as long wave (LW). Frequency bands from 3 to 30 MHz. For distress calls in sea areas A3 and A4 HF frequencies should be used.


Hydrostatic Release Unit - It is a device that will automatically release the EPIRB once a depth of approximately 4-5 m is reached.