Category Archives :Maritime knowledge

Over the years, handheld VHFs have become both a good deal more reliable and, in many cases, a good deal more sophisticated than in years past. This has resulted in a wide range of models that vary dramatically in terms of size, performance, and features. Still, one of the first things you need to think about when choosing a particular model remains how long the radio will continue to function on a single charge, something that is largely a function of battery size.   ...

Radio travels as waves… similar to light, and like light, it can be reflected, reduced, or even stopped by other objects. A popular answer is 'line of sight’ which essentially means 'if you can see it, you can talk to it'. This is generally a good guide. You must remember that the radio signal comes from the radio aerial (not the radio itself) and therefore mounting the antenna higher allows the radio to 'see' further.  ...

DSC means that Digital selecting calling is a stand for transmitting pre-defined digital messages via the MF, HF, or VHF maritime radio systems to replace a voice call in older procedures, which is a core part of the GMDSS. DSC signal is stable and has no squelch, so the communication distance is longer than the analog signal. And the transmit speed of the DSC signal is also significantly faster.  ...

MMSI is Maritime Mobile Service Identity and a unique 9 digit number that is entered into DSC-marine radio equipment. The MMSI number contain you or your vessel information. When using this equipment to send a distress alert or to indicate some other emergency, the number is transferred into the coast guard’s database to assists the emergency services center to identify you or your vessel and react quickly.  ...

For many sailors, cell phones have become their primary means of both ship-to-shore and ship-to-ship communication. Even the Coast Guard will often ask for a cell number after it receives a distress call. None of this, however, makes a VHF radio any less important. A handheld VHF marine radio is your lifeline at sea; be on the ship, watercraft or boat sailing, fishing, or just doing your job.  ...

Master the following tips, you and your children will be safe enough when going out to sea and enjoy the joy of going out to the fullest. Firstly, make sure your marine radio can be opened. Secondly, make a list of your boat’s identification code, frequented harbor channel so that you can get help quickly when you are in trouble.  ...