Cookies & Tracking
Everything this site stores in your browser, in one table.
This page lists exactly what this site stores in your browser, and why. Full detail on how we handle data is in our privacy notice.
No advertising, ever. We set no advertising cookies, run no cross-site tracking and sell nothing to data brokers. Most of what is listed below never leaves your device at all.
What is stored
| Name | Type | What it does | Kept for |
|---|---|---|---|
dwt_slate | Local storage | Your SLATE diver profile (for example your preferred pO₂ limits) so you do not retype it. Stays on your device — never sent to us. | Until you clear it |
dwt_vid | Local storage | A random number so a returning visit is not counted twice. Not linked to you or to any other site. | Until you clear it |
dwt_sid, dwt_nv | Session storage | A random number identifying this browsing session, for the same counting. | Until you close the tab |
dwt_notice | Local storage | Remembers that you dismissed the privacy notice, so it does not reappear. | Until you clear it |
dwt_qa | Local storage | Marks a device as belonging to our team, so our own testing is excluded from measurement. | Until you clear it |
dwt-slate-… | Cache storage | An offline copy of the dive tools, so they keep working at sea with no signal. | Until replaced or cleared |
_ga, _ga_… | Cookie (Google) | Google Analytics: distinguishes visitors and sessions for audience measurement. | Up to 2 years |
Only the last row is a cookie in the strict sense, and only that row involves a third party. Our own measurement uses no cookies at all.
How to control it
- Global Privacy Control or Do Not Track — if your browser sends either signal we load no analytics whatsoever, neither Google’s nor our own. No click needed.
- Google Analytics opt-out — the official add-on blocks Google Analytics everywhere.
- Your browser — clearing cookies and site data for this site removes everything in the table above, including your saved diver profile and the offline copy of the tools.
Blocking or clearing any of this does not stop you using the site or the calculators. The only thing you lose is your saved diver profile and offline access, until they are rebuilt.
Questions
Ask us at dive@doublewingtek.com or on WhatsApp.