Home Featured The DSC Function of Retevis RM40 VHF Marine Radio

The DSC Function of Retevis RM40 VHF Marine Radio

by Wendy

Digital selective calling or DSC is a standard for transmitting pre-defined digital messages via the medium-frequency (MF), high-frequency (HF) and very-high-frequency (VHF) maritime radio systems. It is a core part of the Global Maritime Distress Safety System (GMDSS).  If you are looking for a handheld DSC radio, you can have a look on our RM40 handheld DSC radio. It is a multifunctional handheld VHF marine radio with DSC. Its bulit-in disgital selective call DSC function can achieve all kinds of DSC call including distress call.

DSC button of RM40 marine radio

DSC button of RM40 marine radio

This radio has a red emergency button “distress” on its back. By pressing and holding the button for 3 seconds you can send an emergency distress signal. You can also select the type of emergency from an on-screen list of options, which can save for 10 minutes after your selection. The coastal radio maintains a 24-hour continuous watch on the DSC distress safety frequency. When a ship is in distress at sea and send an emergency distress signal,  nearby ships will immediately receive the emergency rescue call.

All kinds of DSC call

Distress call

A distress call can be transmitted in the opinion of needs while the ship is in distress and require immediate assistance. But please note that the distress call is only be used for emergency help.

Individual call

The individual call function allows to call a specific ship.

Group call

The group call function allows to call a specific ship sation (ship group). The ship has its own group call ID code. The whole ship will receive while transmitting a group call.

All ships call

The all ships call function allows to call the whole ships.

Geographical area call

The geographical area call function allows to call the whole ship sation in the sea area you are in.

Position request call

Transmit a position request call while you want to know a specific ship’s position.

Polling report call

Transmit a polling report call while you want to know if a specific ship is in the commnunication area or not.

Other Features of RM40:

  • Built-in GPS
  • IP67 Waterproof Construction(1 m depth of water for 30 minutes)
  • Floats and Flashes Alarm, Vibration Draining Function
  • MOB Function
  • Dual/Tri-watch Functions
  • Battery Indicator
  • Weather Channel Receive
  • Favorite Channel Function

Here is a simple show of Retevis RM40:

Thank you for reading this blog! If you have any questions, pleasce leave your comments below. We are looking forward to your comments!

If you want to learn more about marine radio, you can read this blog:


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