Viitta

Ventable

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About this app

Cardinal marks tell you where the safest water lies — but interpreting them quickly can take practice.

Viitta makes them easier to understand.

Using your device orientation, Viitta gives you a clear visual indication of the safe-water side of a cardinal mark. The interface is designed to be simple enough to understand at a glance, whether you are learning buoyage or using it as a quick reference.

Perfect for sailors, motorboaters, navigation students and anyone who wants to become more confident with cardinal marks.

PLEASE NOTE: Never rely on your phone or tablet compass for navigation.
Built-in device compasses can give incorrect headings due to calibration errors, magnetic interference, nearby electronics, metal objects and other environmental factors.

Always check and confirm your heading with a reliable marine compass before acting on the information shown by Viitta.

Viitta is a supplementary visual and educational aid only. It does not replace:

- A reliable marine compass
- Official nautical charts
- Navigation equipment
- Local navigation information
- Proper lookout and seamanship