Daily Archives:March 31,2021

Marine radios have transmitters that send out radio waves and receivers that pick up radio waves. The radio waves produced will have a set frequency. Specific groups of frequencies behave differently. For marine radio we group frequencies as: Very high frequency (VHF), Medium frequency (MF), High frequency (HF).  ...

Distress alerts may be transmitted as a single frequency or a multi-frequency call attempt preceded by a dot pattern. MF/HF equipment should be capable of using both single and multi-frequency call attempts. Where a distress alert attempt contains more than one consecutive distress alert on the same frequency, these consecutive alerts should be transmitted with no gap between the end of one call and the start of the dot pattern of the following call to enable bit synchronization to be maintained  ...