Which coast station will answer my DSC test call?

Choose a green station within range. Green stations answered most of the test calls logged.

How is the reply rate measured?

From DSC test calls and the replies heard by volunteer receivers on YaDDNet, counted over a recent two-week window.

Is a green station sure to answer?

No. Propagation, the time of day and the station's own watch all change things. Use it to choose a station, never as proof it is on watch.

DSC Test Call — Which Coast Stations Actually Answer

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DSC coast stations

MF/HF coast stations, coloured by how often they answer a DSC test call.

DSC coast stations

How often a station answers

–stations

–measured

–calls counted

Click a station on the chart for its watch hours, frequencies and how often it answered. A planning aid, never proof a station is on watch.

About

About DSC coast stations

Many MF/HF coast stations keep a DSC watch, but not all of them answer a test call. The DSC tool shows 345 MF/HF coast stations worldwide, coloured by how often each one answered: green usually answers, orange sometimes, red rarely.

The reply rates come from tens of thousands of real test calls logged by volunteer DSC receivers (YaDDNet). Station details come from the IMO GMDSS Master Plan and national lists.

Click a station on the chart for its watch hours, frequencies and reply record.

Questions

Which coast station will answer my DSC test call?: Choose a green station within range. Green stations answered most of the test calls logged.
How is the reply rate measured?: From DSC test calls and the replies heard by volunteer receivers on YaDDNet, counted over a recent two-week window.
Is a green station sure to answer?: No. Propagation, the time of day and the station's own watch all change things. Use it to choose a station, never as proof it is on watch.

A planning tool, not for navigation.

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