Glossary
Glossary
Browse the glossary using this index
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HFHigh 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. | ||
HRU Hydrostatic Release Unit - It is a device that will automatically release the EPIRB once a depth of approximately 4-5 m is reached. | ||