Tag Archives :HF

Marine VHF radio is one of the necessary communication equipment for ships. Because its cost performance and effect are much better than mobile phones, Marine VHF radio has become the most widely used communication equipment in ship communication. There are many brands of VHF marine radio. How should we choose and buy them?  ...

Marine VHF radio belongs to analog radio in terms of system. It can realize convenient communication without network support. It is often used in fishing boats, passenger ships, cargo ships, yachts, kayaks, sailboats, ports, docks and so on. Generally, the use of marine VHF radio requires a use certificate, that is, a certificate. To obtain this certificate, you need to log in to the local maritime department to find and sign up. Let's talk about the characteristics of marine radio.  ...

Retevis RM40 marine radio has been in hand for some time. Compared with the previous RT55 and RA26, the first is that the appearance has changed, the panel is richer, and many functions are triggered directly by buttons. There is no need to search the menu, which looks more professional. The battery adopts polymer lithium battery, and the battery capacity also reaches 1500mAh.  ...

As a high-end handheld marine VHF radio, RM40 has its own DSC function, so it is inevitable to have distress call. For maritime practitioners, the importance of this function is self-evident. This function is briefly introduced below.  ...

Retevis RM40 is one of the few hand-held marine VHF radio with storage and navigation functions, which makes RM40 more functional and practical in the process of navigation, and it is convenient for users to store the geographical location at any time in the process of navigation. Here is a brief introduction to how to set this function.  ...

Retevis RM40 is a professional marine VHF radio. Unlike previous marine VHF radios, it has DSC function. Many handheld marine VHF radios on the market do not include this function, but only on the shipboard platform. Nowadays, the application of DSC function in RM40 to handheld marine VHF radio is a great progress, which helps the crew to alarm and rescue in case of critical environment. Let's briefly introduce the relevant steps of RM40 DSC setting  ...

This paper introduces some basic functions of retevis RM40 maritime radio, which solves some use problems for some users who are not familiar with VHF marine radio. However, RM40 also has some special functions, which are also concerned. It is because of these special functions that it shows its uniqueness. Here is a brief introduction to these features.  ...

As a high-end professional maritime radio, retevis RM40 is a new product launched by retevis marine. It is loved by users for its excellent functional features and high cost performance, and is the best choice for maritime practitioners. Because of its powerful function, it is no less powerful than the fixed shipboard platform. Some common shipboard platform users don't realize that it is difficult to use  ...

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.,  ...