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Privacy policy

How Mariner Tools handles analytics, cookies, and data stored on your device.

Last updated: 13 June 2026

Who we are

Mariner Tools is operated by Watch & Navy. This privacy policy explains how we handle information when you use our free marine and GPS calculators at tools.watchandnavy.com and related domains (including marinergps.app).

What we collect

We do not ask you to create an account and we do not collect your name or email address through these tools.

Analytics (optional)

If you accept analytics cookies, we use Google Analytics 4 to understand how the site is used — for example which pages are visited and in which language. Google may set cookies such as _ga and process usage data according to Google’s Privacy Policy. Analytics only runs after you choose Accept on the cookie banner.

Functional storage on your device

To make the tools work the way you expect, we save some choices in your browser’s localStorage. This is separate from analytics cookies and is not shared with us. It includes:

  • Display theme (standard, high contrast, or night vision)
  • Map style and decimal precision preferences from Settings
  • Whether to remember calculator inputs, and the values you have entered when that option is on
  • Your analytics consent choice

These preferences keep working if you decline analytics. You can clear saved calculator values at any time from Settings.

Maps

Some tools show maps. Depending on configuration, maps may load from Google Maps (including embedded map views). When a map loads, Google may receive your IP address and interaction data under its own terms. See Google’s Privacy Policy.

Cookies and similar technologies

We use cookies only for optional analytics, as described above. Functional preferences use localStorage instead of cookies. You can accept or decline analytics when the cookie banner appears, or change your mind later in Settings.

Analytics cookies are used only with your consent. Functional storage is used to provide features you request (such as remembering settings or inputs) and, where applicable, on the basis of our legitimate interest in operating a usable, reliable website.

Your rights

Depending on where you live, you may have rights to access, correct, delete, or restrict processing of personal data, or to withdraw consent. Because we do not operate user accounts on this site, most data is either stored only on your device or handled by Google Analytics under your consent. To exercise rights relating to analytics data processed by Google, you may also use tools provided by Google or your browser.

You can decline or withdraw analytics consent at any time without affecting the calculators or your saved preferences.

Children

Mariner Tools is a general-purpose navigation utility and is not directed at children under 16.

Changes

We may update this policy from time to time. The “Last updated” date at the top will change when we do.

Contact

Questions about this policy can be sent via watchandnavy.com.