Tag Archives :Frequency
Introduction of Marine VHF Radio Frequency
- Mar 08,2021
- Leeric
- 0 Comments
- Maritime knowledge
Some novice crew members have some doubts about the frequency of marine VHF radio. This article gives a brief explanation of the frequency of marine VHF radio. ...
Distress Alert
- Mar 31,2021
- Leeric
- 0 Comments
- technology suggestion
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 ...
5 answers about marine VHF radio
- Jul 08,2021
- Leeric
- 0 Comments
- technology suggestion
There is no "distance" index in radio communication, because the ultra short wave communication is line of sight transmission, and the signal is blocked and interfered by buildings, hills, forests, electromagnetic fields, etc., ...
Why do marine radio use V-band wave
- Jun 18,2021
- Leeric
- 0 Comments
- technology suggestion
The principle of intercom communication is to use electromagnetic wave to transmit information in the air. According to Maxwell's electromagnetic field theory, the changing electric field produces the changing magnetic field, and the changing magnetic field produces the changing electric field. ...
AIS Fishing Net Buoys is not AIS
- Mar 13,2021
- Leeric
- 0 Comments
- technology suggestion
What is AIS? AIS is an important maritime navigation safety communications system intended to limit maritime accidents by automatically broadcasting and exchanging marine vessel information – including a vessel's identity, type, position, course, speed, navigational status, and other safety-related information – between and among AIS-equipped shore stations, aircraft, and other vessels. ...