Category Archives :technology suggestion

Marine radio equipment operating in the VHF band is made up of three major parts: The power supply The transceiver The antenna or aerial  ...

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  ...

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.  ...

While out at sea, being able to communicate using marine antennas is of vital importance. Whether it’s for commercial fishing or for recreational use, a marine antenna is a vessel’s lifeline to the outside world. Your boat’s marine antenna is something that you don’t want to take for granted. While many people do their best to predict weather patterns and swear that their own experience has taught them enough to be safe at sea,  ...

There are two types of maritime VHF radio: Handheld and fixed, in which the fixed maritime VHF radio contains MMSI code. Different brands of maritime VHF radios have different editing methods for MMSI code. The following is a brief introduction to the MMSI code editing method of RA27.  ...

Marine VHF radio is an important safety tool for mariners, but the wide range of available models and functions makes it difficult to choose when buying. Below we give some suggestions to help you make a choice. First, the Marine VHF radio must be easy to use. The maritime climate and environment change rapidly. Second, the Marine VHF radio must have standard power, 25W or 5W.  ...

Digital Selective Calling (DSC) is primarily used to initiate distress calls to shore stations and other vessels via your DSC radio. All DSC-equipped shore stations and vessels will hear your distress signal as an alarm. It will be repeated every 4 minutes until acknowledged. A DSC alert signal has a 15% greater range than a voice transmission and therefore is more likely to reach a vessel or rescue center  ...

In a few weeks, various sailing competitions will be held one after another. Many people began to prepare various equipment, and many enthusiasts participated in the training. The coaches in the training center will do their best. Therefore, almost every coach must have a VHF marine radio.  ...

The antenna is an important component to marine radios and if there’s an issue with the antenna there’s going to be an issue with your coverage and range. Check to make sure the radio’s antenna is not bent, cracked, or otherwise broken to the point that the metal coiled antenna piece is exposed. In addition, make sure the antenna is screwed on correctly to the antenna connector of the radio.  ...