Dive Log & Certification Tracker
Log dives with depth, time, gas and buddy, with totals, a depth profile and the milestones operators ask about — stored in your browser.
Depth profile of your logged dives
Log
| # | Date | Site | Depth | Time | Gas | Buddy |
|---|
Logged-dive milestones
A logbook is a record, not a scoreboard
Operators ask for a dive count because it is the only number they can ask for quickly, but it is a poor proxy for what they actually want to know. Fifty dives in one warm, clear, shallow site is not the same experience as fifty across cold water, current, night and boat entries — and everyone in the industry knows it.
What makes a logbook useful to you is the detail the count throws away: which weight worked in which suit, what the gas lasted at what depth, which sites were worth returning to. That is why the fields here are the ones that change your next dive rather than the ones that look impressive.
Everything is stored in this browser and nothing is uploaded. If your logbook matters to you, export the CSV — a browser cache is not a record you want a certification to depend on.
How to use
- Log each dive soon after surfacing.
- Record depth, time, gas, conditions and buddy.
- Note anything that went differently than planned.
- Export regularly — this is stored locally only.
Frequently asked questions
Why keep a dive log at all?
Because operators and instructors ask for it. Recent logged dives are commonly required for advanced training, for hiring equipment, and for access to more demanding sites — an unlogged diver with twenty years of experience frequently has to prove it from scratch.
What is worth recording beyond the numbers?
Conditions, visibility, weight used, exposure suit, and anything that did not go to plan. Weight in particular is the detail people wish they had written down, since getting it right in unfamiliar kit saves a whole dive.
Does a paper log still matter?
Less than it did, though many operators still like to see one and some instructors sign paper logs. A dive computer's log is the more reliable record of what actually happened, and keeping both covers you either way.
What counts as a logged dive?
Conventions vary, and agencies differ on minimum depth and duration. The practical answer is to log honestly and consistently — inflating a log count to meet a course prerequisite is a way of arriving underprepared at something that assumed you were not.
Should I log my computer's profile too?
If you can, yes. The depth profile shows how the dive actually went rather than its maximum and duration, which is far more informative for reviewing your own gas use, ascent rate and time at depth.
Where is my log stored?
In your browser on this device, with nothing uploaded and no account required. It does not sync between devices and clearing browsing data removes it, so a log representing years of diving should be exported and kept somewhere durable.
🔒 This tool runs entirely in your browser. Nothing you enter is uploaded, logged, or stored.