Effective date: April 5, 2026

Cookie Policy

1. First-Party Cookies

ChartNav does not set any first-party cookies. No cookies are used for authentication, session management, analytics, or tracking.

2. Local Storage

ChartNav uses the browser localStorage API to persist user preferences and functionality on your device. This is technically distinct from cookies but serves a similar purpose. Stored data includes:

• Fleet selections — MMSI identifiers of vessels added to your fleet
• Fleet notes — user-entered notes associated with fleet vessels
• Interface preferences — display settings and UI state

All personal data, including your fleet selections, notes, and preferences, is currently stored on your device using localStorage. None of this data is transmitted to or stored on ChartNav servers. Storage methods may change in future versions of the Service.

3. Third-Party Cookies and Requests

The Service loads resources from external providers during normal operation. These providers may set their own cookies or collect usage data in accordance with their own policies:

• Google Fonts (fonts.googleapis.com, fonts.gstatic.com) — typeface delivery
• Carto (basemaps.cartocdn.com) — map tile imagery
• unpkg (unpkg.com) — open-source library CDN (MapLibre GL)
• Wikimedia (commons.wikimedia.org) — vessel photographs

When your browser requests resources from these services, your IP address and standard HTTP headers are transmitted to their servers. ChartNav does not control the cookie or data collection practices of third-party providers.

4. Managing Stored Data

You can remove all locally stored ChartNav data through your browser's site data settings:

• Chrome — Settings > Privacy and Security > Site Settings > View permissions and data stored across sites
• Firefox — Settings > Privacy & Security > Cookies and Site Data > Manage Data
• Safari — Settings > Privacy > Manage Website Data

5. Changes to This Policy

This Cookie Policy may be updated from time to time. Changes will be reflected by updating the effective date above.

6. Contact

For questions about this policy, please contact us through the information provided on the ChartNav application.