This sailing, boating and marine application provides all sea goers with essential quick reference knowledge to help them identify vessels (along with the activity they are engaged in) as specified by the International Regulations for Preventing Collisions at Sea (published by International Maritime Organisation), also referred to as COLREGs or ROR (Rules of the Road).

Whether out in the open ocean or in inland waters connected to these open seas, simply open this application and refer to the rules for different conditions of visibility for ready reference.

The app contains more than 75 custom made lights and shapes card to clearly explain various situations that one can come across at sea. This app can also be effectively used toward preparation for various RYA exams.

Each lights and shape card has four parts to it, namely, explanation, day shape / night light, sound signals and most importantly, your action.

A must have for every skipper or crew.

What’s New

Version 2.0

upgraded for latest versions

App Privacy

The developer, Prachi Pimpalkhare, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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