A VHF Marine Radio Simulator BETA

a close up of the simulated VHF radio

Practice your Marine Radio skills with the Comsim radio simulator. Whether you're preparing for a SRC, SROCP, ROC or just want to see how it works to send a DSC distress alert without the risk of really sending one. Comsim works directly in the browser on all platforms, no installation required.

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a screenshot of the entire application, including app navigation

Realistic device

Comsim's simulator is modeled after one of the most common devices on today's leisure yachts, preparing you to feel comfortable on most charters. It's also one that most examination bodies offer to use during practical exams.

a screenshot of the application, the left side displaying an introductory course

Hands-On Tutorial

Learn using the device effortlessly with our hands-on tutorial. Our course will help you find all the right knobs and settings to get started. Each chapter will end with an easy task, where you'll get immediate automated feedback on how you did.

a screenshot of a feedback the AI tutor would provide. First, the task the student had to complete: "You see he sailing vessel "Augustine" ahead. Ask them whether they can hear you." Next, the evaluation the AI tutor gave: "Good attempt, but you forgot to specify your sender name. Remember, the structure is 'Recipient, This is Sender'. So a correct example would be 'Augustine, Augustine, Augustine. This is Seven, Seven, Seven. Are you listening? Over.' Try again!" Lastly, in a light grey font, a link: "Am I wrong?"

AI Tutor

Comsim's AI Tutor can understand your transmissions and give you instant feedback, helping you get confident in your phrasing, just like a teacher would. Of course, we understand not everyone is comfortable using AI, so we've also built an alternative using a self-assessment method.

a screenshot of the application in live mode. you can see a connection bar at the bottom and a chat on the right.

Live Mode

In our live mode you can connect your simulator to those of other users, as if you were on the ocean together. You can also use chat to have side conversations. Only want to connect with friends or classmates? Create your own world and let others join using a private link.

Privacy made in Germany

Comsim is made in Germany, built with our high standard for privacy. There's no tracking cookies, no click tracking analysis, no ads – we're just collecting the data our app really needs to work. Our data is stored on servers based in the E.U. Read our full privacy statement for details.