Tag Archives :DSC

Retevis Marine is committed to providing good marine radio to customers, so often communicate with them. During the communication, we found that many customers still don’t know how to send DSC calling or when they can send DSC calling. Today, we will make a brief introduction about DSC calling.In a relay situation, there is no longer a requirement to send a DSC ‘Urgency Announcement’. The ‘Mayday Relay’ voice call remains unchanged and should still be transmitted as normal.  ...

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  ...

The simple answer: If your radio has a button that is covered by a bright red, see-through plastic cover, then it has DSC (Digital Select Calling) capability. Note that DSC does not work “out of the box”. It requires the owner/installer to follow some simple steps for it to be enabled. Refer to: ‘After you buy a Class D VHF radio’ of these instructions for details. Please note that not all fixed-mount DSC VHF radios are Class D compliant, and must be in order to be installed in any vessel.  ...

Class D equipment is specifically designed for recreational vessels. It provides VHF DSC distress, urgency and safety as well as routine calling and position polling. Class D equipment includes a dedicated channel 70 DSC receiver, so you will never miss a DSC call.  ...

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  ...

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.  ...

Digital Selective Calling (DSC) is primarily used to initiate distress calls to shore stations and other vessels via your DSC radio and provides recipients of your emergency call with: Your Vessel’s Identity  ...

Speaking of DSC, arguably the single most distinguishing feature of any handheld VHF (even more so than battery life) is whether or not it includes this feature—a technology that allows the user to send out a digital distress message to the Coast Guard or any other DSC-equipped vessels in the area that clearly indicates your identity, your location and the nature of the emergency.  ...

Automatic Transmitter Identification System (ATIS) is equipment developed to identify vessels travelling on the inland waterways of several European countries. These countries together form the Regional Arrangement Concerning the Radiotelephone Service on Inland Waterways, or RAINWAT.  ...

The ATIS signaling protocol is based on the protocol used for Digital Selective Calling (DSC), with the ATIS transmissions having the format specifier field set to 121. While the DSC transmission is exclusively on Channel 70, the ATIS digital signal is transmitted on the same VHF channel as the voice transmission.  ...