Terms of Service

Last updated: November 2026

{projectOperated && ( The sections below leave several things to the operator of the copy you are reading, because the software cannot decide them. On this copy the operator has, and these are the answers. Each names the section it belongs to; nothing here narrows what those sections say. } > {PROJECT_OPERATOR.jurisdiction}. That is where the operator named above primarily operates the Service, which is what §12 points at. Nothing, and only people who have been invited {joinLinks && <> or who follow one of its join links}. This copy is in a closed beta: it is free of charge, there is no paid tier, and registration needs an invitation {joinLinks && <> or a join link}, which is the state §3’s second paragraph describes. Nothing, and §8 stands exactly as written. This is a beta: the operator may change it, take it down for maintenance, or stop running it, and no uptime is promised. You are told before anything is deleted. The operator will email the address on each account, and the export in Settings — the one §6 says needs nobody’s permission — keeps working for at least 90 days from that message. Accounts and everything in them are deleted once that window closes, the same way §11 and the Privacy Policy’s §7 describe a deletion you ask for yourself. §7 says that offer is the operator’s to make. Here it is. The complete source of the version running on this copy is available on request from{" "} {PROJECT_OPERATOR.contactEmail} , and in the project’s public repositories at{" "} github.com/opendiving . The request is the route that works whatever this copy is running, which is why it is written first. Which build is running is not a guess:{" "}


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1. Acceptance of Terms

OpenDiving is open-source software for logging dives. Anyone can download it and run their own copy, and these Terms ship with the software, so they describe this copy — the one you are reading them on. By using it (“the Service”) you agree to them. If you do not, please do not use this copy.

Two roles appear on this page, and it keeps them apart because they do not owe you the same things:

The OpenDiving project — the people who write the software. Authorship on its own gives the project nothing here: where it is not the one running this copy, it runs no servers for it, receives no data from it, and never sees what you log here.
The operator of this copy — whoever installed OpenDiving on the machine serving you this page and runs it. They decide who may sign up, where the data sits, what it costs if anything, and whether the Service is still here tomorrow.

Those are two roles rather than necessarily two parties, and one party can hold both. The OpenDiving project may run a copy of its own, and on such a copy it is the operator as well as the author — bound by everything these Terms say of the operator, and speaking through those sections in that role. What never merges is the roles themselves: the sections below keep them apart whoever is standing in them.

Every section below speaks for the operator of this copy unless its heading says otherwise, and “we” in those sections means the operator. Three sections say otherwise: 7, 9 and 10 speak for the OpenDiving project and name it in their headings. Section 5 is the operator’s apart from what it says about the OpenDiving project, which names the project where it does. Where the word OpenDiving stands alone anywhere on this page, it is the name of the software and not a party doing anything.

If you are the one running this copy, that phrase —{" "} the operator of this copy — is you, and it is written out wherever a sentence here turns on something only you can answer for. Searching the page for it is the quickest way to find what is yours to stand behind or to replace with your own; the rule above is what settles anything it misses.

2. Description of Service

{commonsPrimary ? "This copy of OpenDiving is a dive log that keeps what you enter to yourself, and the place where OpenDiving Commons, a public pool of dive sites, is edited. The software lets you:" : "This copy of OpenDiving is a private dive log. The software lets you:"}

Log dives, by hand or from a file exported by a dive computer
Keep your own list of dive sites and plan trips around them
Propose a dive site of yours, or a change to a Commons site, for OpenDiving Commons, which a reviewer accepts or declines
Track your gear and when it is due for service
Record your diving certifications and the courses behind them
Keep the dive centers, shops and places you stay at once, and name them from your dives, courses and trips
Keep the people you dive with once — buddies, guides, instructors — and name them from your dives, trips and courses
Keep the details a dive shop asks for at the desk, and print a summary of them to hand over, or share it as a link that works for a day
Note the species you saw, from public registers of marine life

What it does not do is worth stating, because a page like this one usually claims otherwise: there are no public profiles, no feeds, no forums,{" "} {commonsPrimary ? "nothing one diver can post for another" : "no comments"} , no public ratings and no photo sharing. The rating you give a dive is part of your own log. The people you record are private records of yours, not connections between accounts.{" "} {commonsPrimary ? "An account on this copy gives its holder no view of what you enter, apart from an administrator's, which reads what you propose for OpenDiving Commons." : "An account on this copy gives its holder no view of anything you enter."}{" "} This copy shows one person to another in{" "} {commonsPrimary ? "four" : "three"} cases only: an invitation, which is about your name rather than about anything you entered; a check-in link you make, which shows your check-in page to whoever holds it, account or not; {!commonsPrimary && "and "}a person you link to an account here, which shows you that account’s current username and puts its identifier in your own export {commonsPrimary && "; and a proposal for OpenDiving Commons, which shows what you proposed and your name to whoever reviews it, and publishes what is accepted, without your name"} . Section 5 says exactly what each is, and what follows from the rest.

Whether this copy costs anything, who may register for it, and how long it keeps running are decisions for the operator of this copy, not for the software. The software is free in the sense section 7’s licence means, which says nothing about what an operator charges.

3. User Accounts and Registration

Using this copy for anything beyond the pages you can read now needs an account. You agree to:

Register with an email address you actually control — it is how you sign in and how the operator of this copy reaches you
Keep that mailbox secure. There is no password here: you sign in with a link or a code sent to your email, with a passkey, or — where this copy offers it — with Google. So whoever can read that mailbox, use that passkey, or get into that Google account can sign in as you. Keep any API key you make the same way: whoever holds one can act as you, within what that key allows, until it expires or you revoke it
Tell the operator of this copy promptly if you think someone else has got into your account
Accept responsibility for what is done under your account

Where the operator of this copy has closed it to new accounts, registering also needs an invitation, and the address you register with must be the one that was invited, unless you came by a member’s invite link {joinLinks ? ( <> {" "} or by one of the join links the operator has published, either of which lets in whoever follows it ) : ( <>, which lets in whoever follows it )} . The exception is the very first account on a copy that has none: whoever signs in first is its operator, and needs no invitation to do so.

4. Safety and Diving Responsibilities

Important Safety Notice: OpenDiving is software for logging dives. It does not provide diving instruction, safety advice, or emergency services.

You acknowledge and agree that:

Diving is an inherently risky activity
You are solely responsible for your diving safety and decisions
You will only dive within your certification and experience level
You will follow proper diving safety protocols and procedures
Nothing this software works out or displays — depths, times, gas figures, exposure — is a substitute for your training, your dive computer and your own judgement
{commonsPrimary ? "What you type in, and what is imported from a dive computer, is kept as it arrived, and nobody checks it, with one exception: a reviewer reads what you propose for OpenDiving Commons, and may correct it or decline it. Accepting a record says it belongs in the pool, and nothing about whether a site is safe to dive" : "What you type in, and what is imported from a dive computer, is stored as given. Nobody checks it, and nothing here corrects it"}
Neither the OpenDiving project nor the operator of this copy is liable for diving-related injuries or incidents: section 9 is the project’s position, section 8 the operator’s

5. User Content and Conduct

What you enter into this copy — dives, dive drafts, sites, trips, gear, courses, certifications, contacts, people, tags, your check-in details, notes, and the files you import —{" "} {commonsPrimary ? "is your responsibility, and stays yours unless you dedicate it to the public domain by proposing it for OpenDiving Commons." : "is yours, and you are responsible for it."}{" "} You agree not to use this copy to hold or send:

Anything unlawful where you are, or where the operator of this copy is
Anything you have no right to hold, including other people’s personal data you have no basis for keeping and material that infringes someone else’s rights
Anything aimed at breaking into, overloading or disrupting this copy, or at working around the limits it puts on requests

Three things this copy expects you to hold can be somebody else’s data, and holding any of them is inside the line above rather than an exception to it. A person is the plainest case: a buddy’s or an instructor’s name, and whatever else you choose to note, kept as your own record of who you dived with. An emergency contact is a name and a number kept so a dive shop can reach someone if you get into trouble. A contact is usually a business’s own listing — the number and address on its sign — but it can be a person, the friend whose flat you stayed in, kept as your own record of where you dived and slept. Each is a basis for keeping what you enter. Telling a person you have written them down here is yours to do, not this copy’s.

{commonsPrimary ? "Every right you have in what you enter stays yours, apart from what you dedicate by proposing it, as the paragraphs below say." : "You keep every right you have in what you enter."}{" "} Nothing here gives the OpenDiving project any rights in your content as the software’s author — writing a program grants no claim on what is entered into a copy of it, and where the project is not the one running this copy it receives no data from it and never sees what you log. Where the project is the one running it,{" "} {commonsPrimary ? "it holds what the paragraphs below grant the operator, may use what has been dedicated to the public domain as anyone may, and holds nothing beyond that." : "it holds what the next paragraph grants the operator and nothing beyond that."}

{commonsPrimary ? "Proposals aside, you grant the operator of this copy no more than what is technically needed to run the Service for you" : "You grant the operator of this copy only the permission technically needed to run the Service for you"}{" "} — to store your entries, show them back to you, and include them in exports you ask for.{" "} {commonsPrimary ? "Nothing you enter is published, shared with other users, or shown to anyone else by this software, except through a check-in link you make or a proposal you send for OpenDiving Commons." : "Your entries are not published, shared with other users, or shown to anyone else by this software, except through a check-in link you make."}{" "} Printing your check-in summary and handing it to a dive shop is you showing your own entries to someone, not this copy showing them, and the permission above is unchanged by it.{" "} {commonsPrimary ? "The next four paragraphs are the four things" : "The next three paragraphs are the three things"}{" "} this copy does show one person to another: an invitation, which is not an entry; a check-in link, which is;{" "} {!commonsPrimary && "and "}a person linked to an account, which shows you something of theirs rather than anything of yours {commonsPrimary && "; and a proposal, which is an entry, and the one thing here that can end up public"} .

Where this copy is invite-only and you invite somebody to it, you grant the operator the further permission that act needs, and only that: to tell the address you invited that you{" "} invited them, naming you, and to tell you whether that address went on to register here; and, where you make an invite link, to show your name to whoever opens it, and to show you the name on the account of anyone who creates one through it. Nothing you have logged is involved — no dive, site, trip, gear item, course, certification, contact, person or tag — and nobody you have not invited learns anything either way, except that whoever holds your invite link, however it reached them, sees your name. And where you create your account through a member’s invite link, you grant the operator the permission that needs, and only that: to show that member the name on your account, as it is and as you change it, for as long as both accounts exist — never your address, and nothing you log. The privacy policy’s section 4.8 sets out the same in its own register.

Where you make a check-in link, you grant the operator the further permission that act needs, and only that: to show your check-in page — the details, figures and card fronts it prints — to whoever holds the link, until it expires a day after you made it or you revoke it or make another. That is this copy showing your entries to someone, at your request, and nothing else you have logged is involved. The privacy policy’s section 4.9 sets out the same in its own register.

Where you link a person you recorded to an account on this copy — by typing its username, or by importing a file that names it — you grant the operator the further permission that act needs, and only that: to tell you whether an account with that username exists here, to show you its current username beside your person for as long as the link stands, and to write that account’s identifier, which also encodes when the account was created, into the exports you ask for. Nothing you have logged is shown to that account, and it is told nothing either way. The same holds the other way round: anyone here who types your username can link a person to your account, and learns that it exists, its current username and its identifier, and nothing else. The privacy policy’s section 4.10 sets out the same in its own register.

{commonsPrimary && (

Where you propose a dive site of yours, or a change to a Commons site, for OpenDiving Commons, you grant the operator the further permission that act needs, and only that: to show whoever reviews it what you proposed, your message, the name on your account and how many of your proposals have been accepted and declined; to correct it before accepting it; to keep the proposal, tied to your account, until your account goes; and to publish what is accepted, in the pool and in the public copies of it. The words you tick go further than a permission. In them you say that what you propose is from your own diving and is not copied from another database, app or publication, and you dedicate it to the public domain under{" "} CC0 1.0 , which gives up your rights in it, for everyone, as far as the law allows. What is accepted is public, never says who proposed it, and stays if you delete your account; a change accepted into a record from another source leaves that record under its source’s licence. What is declined or withdrawn publishes nothing, and a decline always comes with a reason. Anyone can report a Commons record to the operator of this copy, by the way section 13 gives, and a report is answered by changing the record; a record cannot yet be removed. The privacy policy’s section headed{" "} Proposing for OpenDiving Commons sets out the same in its own register.

)}

That permission is deliberately no wider than what running the Service takes, and the OpenDiving project holds itself to keeping it that way: if a version of the software ever adds a way to show what you entered to someone else, that feature arrives with a permission of its own written here and a section of its own on the privacy page, rather than leaning on this one.{" "} {commonsPrimary ? "The invitation, check-in link, linking and proposal grants above are that rule being kept, not exceptions to it." : "The invitation, check-in link and linking grants above are that rule being kept, not exceptions to it."}

6. Privacy and Data Protection

What this copy collects, what it keeps in your browser, how long it keeps any of it, and who is answerable for it are set out in the{" "} Privacy Policy , which describes this copy the same way these Terms do.

Two things worth knowing without reading it:{" "} {commonsPrimary ? "exporting what you have entered, your proposals for OpenDiving Commons aside," : "exporting everything you have entered"}{" "} and deleting your account are both buttons in Settings, and neither needs anyone’s permission.

7. Open Source License (the OpenDiving project)

This section is about the software rather than about this copy’s operation, and it speaks for the OpenDiving project. OpenDiving is published under the GNU Affero General Public License, version 3. Under it anyone may run, study, copy, modify and redistribute the software, on the conditions the licence sets out — chiefly that a derived version carries the same licence and stays source-available.

The licence also gives you something as someone merely using a copy over a network: if the operator of this copy has modified OpenDiving, section 13 of the AGPLv3 requires them to offer you the source of their modified version. That offer is the operator’s to make rather than the author’s — including where the project runs this copy, and so owes it as operator. The project publishes its own source publicly, and that is not necessarily what is running here. {projectOperated && ( <> {" "} On this copy the offer is made, under{" "} Who Runs This Copy at the top of this page, along with what identifies the build running here. The public repositories this section speaks of are named there too. That offer still leads with the request rather than the link, because what section 13 owes you is the source of the version running here, which a repository on its own does not pin and the commit named there does. )}

The licence text ships with the software and is the authority on all of this. Nothing in these Terms adds to it or takes anything away from it.

8. Service Availability and Modifications

Whether this copy is available, and for how long, is the operator of this copy’s to decide. They may modify or discontinue features, take it down for maintenance, or stop running it altogether. Nothing in the software guarantees uptime, and the OpenDiving project promises none of it as the software’s author: where it does not run this copy it could not keep this one up if it wanted to, and where it does, the promise would be the operator’s to make and it has made none.

These Terms are part of the software, so they change when the software changes and ship in the same release. There is no mechanism here that emails anyone about a change to them, and this page is not going to promise one it does not have. What exists instead is the software’s public history, where every earlier version of this page can be read; which version you are reading depends on which release of OpenDiving this copy is running.

This copy of OpenDiving is provided as-is by its operator, who is responsible for its operation and for the data it holds. The operator may replace this paragraph with its own terms. {projectOperated && ( <> {" "} This copy’s operator has not replaced it, and has said under Who Runs This Copy what it promises about availability and what happens to your data if this beta ends. )}

9. Limitation of Liability (the OpenDiving project)

This section speaks for the OpenDiving project, not for the operator of this copy. To the maximum extent permitted by law, the OpenDiving project, its contributors, and its copyright holders shall not be liable to you for:

Any indirect, incidental, special, or consequential damages
Loss of data, profits, or business interruption
Diving accidents or injuries of any kind
Anything you decided on the strength of what the Service showed you
Content entered into any copy of OpenDiving, and interactions between the users of a copy where an operator has enabled any

This limitation is agreed for the benefit of the OpenDiving project and its contributors. The contributors are not parties to these Terms and rely on this section as third parties; so does the project itself, wherever it is not the one running this copy. Where it is, it is a party in the operator’s role, and this section still limits only what it owes you as the software’s author. It adds to, and does not narrow, sections 15 to 17 of the AGPLv3.

The operator of this copy speaks in a different role and says nothing here, and that holds even where the project is the one running this copy: what is limited above is the author’s liability, never an operator’s. Their position is the last paragraph of section 8, and it is theirs to replace.

10. Indemnification (the OpenDiving project)

You agree to indemnify and hold harmless the OpenDiving project and its contributors — not the operator of this copy — from any claims, damages, or expenses arising from your use of this copy of OpenDiving or your violation of these Terms.

This section does not cover the operator of this copy. They are not indemnified by it, and it reaches the project no further where the project is the one running this copy: what is indemnified is the writing of the software, never the running of a copy of it. An operator who wants an indemnity has to ask for one in terms of their own.

11. Termination

The operator of this copy may suspend or close your account for a breach of these Terms, and may stop running this copy altogether. You can delete your own account at any time in Settings; the Privacy Policy says what happens to your data when you do.

12. Governing Law

These Terms shall be governed by and construed in accordance with the laws of the jurisdiction where the operator of this copy primarily operates the Service, without regard to conflict of law provisions. {projectOperated && ( <> {" "} On this copy that is {PROJECT_OPERATOR.jurisdiction}, named with the operator under Who Runs This Copy at the top of this page. )}

13. Contact Information

For anything to do with this copy — your account, your data, {commonsPrimary && "a report about a Commons record, "} what these Terms mean for you, or the Service being down — the person to ask is whoever runs this copy of OpenDiving. The{" "} support page {" "} is how this copy offers to reach them.

For a defect in the software itself — a bug, or a sentence on a page like this one that the software does not live up to — the OpenDiving project is who to tell, in its public source repository. As the software’s author the project cannot answer for how a copy it does not run is run: it has no access to that copy and holds none of the data in it. Where the project is this copy’s operator too, questions about how this copy is run still go the way the paragraph above says, not to the repository.

There is deliberately no project address printed here.{" "} {projectOperated && ( <> None, that is, for the project as the software’s author: the address under Who Runs This Copy{" "} belongs to this copy’s operator, which is the role that can act on what follows.{" "} )} A question about your own account belongs to whoever runs this copy, and the support page above is how to reach them — on a copy the project runs itself, that page reaches the project in the role that can act. Sent to the author instead, such a question reaches people who cannot. How quickly the operator of this copy answers, and whether they do, is theirs to say rather than this page’s.

These Terms are effective as of November 2026 and apply to this copy of OpenDiving.

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