These procedures are part of the VHF Short Range Certificate (SRC) course and exam, but the simulator is equally useful for refreshing your knowledge. Select a scenario, operate the radio, and follow the correct procedures.
📖 Looking for the written briefing? Each scenario has a dedicated page with procedure walkthrough and key points: Browse all 15 VHF scenario briefings →
Distress & Mayday
1. Mayday – Voice Distress Call
Your yacht is sinking. Send a Mayday call on the correct channel following the full ITU procedure.
2. Mayday Relay
Another vessel sent a Mayday but the coastguard has not responded. Relay the distress call.
Urgency & Safety
3. Pan-Pan – Urgency Call
A crew member has severe abdominal pain. Send a Pan-Pan urgency call requesting medical assistance.
4. Sécurité – Safety Announcement
You have spotted a navigation hazard. Broadcast a Sécurité safety message to all vessels.
9. Pan-Pan – Engine Failure
Your engine has failed in a busy shipping lane. Send a Pan-Pan urgency call requesting towing assistance.
Routine Calls
5. Radio Check – Riga Traffic
Call Riga Traffic (VTS RIGA) on Channel 16 to perform a radio check and confirm your radio is working correctly.
6. Marina Call – Auda Marina
Call Auda Marina on working channel 69 to request a berth.
7. Ship-to-Ship Call
Call motor vessel NEPTUNE on Channel 16, agree a working channel, then pass your message.
8. Receiving a Routine Call
Fishing vessel LASIS calls you on Channel 16. Respond correctly, agree a working channel, and complete the conversation.
DSC Digital
10. DSC Distress Alert
Send a digital DSC distress alert without selecting the nature of distress, then follow up with a voice Mayday on Channel 16.
11. DSC Distress Alert – Nature of Distress
Transmit a DSC distress alert specifying the nature of distress, then follow up with the required voice Mayday on Channel 16.
12. DSC Routine Individual Call
Use DSC to call sailing yacht ELEONORA by MMSI, select a working channel, and establish voice contact on Channel 72.
13. Receiving a DSC Individual Call
Your radio receives a DSC individual call. Use the softkeys to acknowledge and establish voice contact.
14. Receiving a DSC Distress Call
Your radio receives a DSC distress alert from sailing yacht SELENA. Acknowledge, switch to Ch16, and relay the Mayday if no coast station responds.
Explore
15. Explore the Radio
No guided steps — turn the radio on and freely operate all controls. Learn channels, DSC menu, SCAN, DUAL, HI/LO, and PTT.