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Retevis RM40 is a professional VHF radio newly launched by retevis, which is suitable for use on board. This new handheld marine VHF radio has powerful functions, including professional built-in DSC receiver, built-in GPS and active noise reduction technology, as well as high contrast dot matrix display and soft keys, which makes the operation more convenient and comfortable. Let's talk about its characteristics.  ...

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.,  ...

Retevis RM40 is a professional compact marine water-proof VHF radio, which is suitable for marine operations, such as fishing at sea, oil production at sea, ship extradition at port, channel distress alarm, etc.  ...

Retevis RA27 is a powerful VHF / DSC marine VHF radio, with AIS receiver and NMEA connection functions. The RA27’s front face is so compact that it matches the size of a modern smartphone. However, despite its small size, it has all the hallmarks of design, ease of use and performance.  ...

As a communication tool, two way radio has a long history. Maritime radio is the first representative of radio to enter the field of navigation. Radio was widely used in shipping industry, from the earliest radio telegraph to the radio station later, and now the more advanced maritime satellite communication system. Marine VHF radio is a kind of system intercom  ...

When building a radio communication system on board, multiple antennas, such as satellite receiving antenna, GPS positioning antenna and VHF marine radio antenna are needed. Most of these antennas are all omnidirectional FRP antennas. Why to use them and what characteristics they have, I will talk to you today about this omnidirectional FRP antenna.  ...

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.  ...

In recent years, with the vigorous development of water industry, water traffic is more and more developed, communication safety is more and more important, and the use of maritime walkie talkie is more common. Summarize some of the most common faults and solutions in daily use for users' reference.  ...

The communication distance of maritime radio is generally far, because the environment is relatively open, reducing the loss of radio waves. But relying on the environment alone can not make the maritime VHF radio have a good communication signal. Here are some methods to improve the signal intensity of marine radio.  ...

Retevis ra26 is a professional compact marine waterproof interphone, which is suitable for marine operations, such as fishing at sea, offshore oil production, extradition of ships at ports, distress alarm of waterway, etc.  ...