Effective date: March 14, 2026
Last updated: September 6, 2026
SV.GOAT is an informational tool, not a safety system. It shows you information about your vessel. It is not certified marine safety equipment, it is not navigational equipment, and no one at SV.GOAT is watching your boat.
Never use it as your only anchor watch, your only alarm, or as a substitute for a proper lookout and human watchkeeping — including night watches. Alarms may fail to fire, fire late, or fire falsely. Silence does not mean safety.
SV.GOAT is a prototype. The app and the GOAT device are pre-release and under active development. They contain defects, they will fail, and by using them you accept prototype levels of failure.
Sections 10, 11, 12, 13 and 14 set out what the Service is, how it can fail, what you are accepting, what you must still do yourself, and the limits of our responsibility. They matter more than any other part of these Terms.
By accessing or using the SV.GOAT application, website at svgoat.app, or GOAT device hardware (collectively, the "Service"), you agree to be bound by these Terms of Service ("Terms"). The Service is operated by MDONZELLI LTD ("we", "us", "our"), a company registered in England and Wales. If you do not agree to these Terms, do not use the Service.
SV.GOAT is a boat monitoring platform that lets you view information about your vessel, including through a dedicated hardware device (the "GOAT device") connected to the vessel's NMEA 2000 network and SignalK server. The Service includes telemetry monitoring, anchor watch alerts, weather forecasts, voyage logging, vessel sharing, AI-assisted insights, and related features accessible via our mobile apps and the web application. Where connectivity allows, information is shown close to real time; where it does not, information may be delayed, incomplete or absent.
The Service is informational only. What that means, and what it does not include, is set out in Section 10, and feature by feature in Section 10.1.
To use the Service, you must create an account. You agree to:
The Service has a standard level of access and an extended level of access. We do not sell a subscription. There is no recurring fee, no billing period, and we do not take payment from you for access to the Service.
Extended access is normally obtained by buying a GOAT device. When a GOAT device is registered to your account, the extended features are enabled on that account. We may also enable extended access in other ways at our discretion — for example for testers, for support purposes, or as a promotion — so buying a device is not the only way an account can have extended access.
The GOAT device is a physical product supplied by our partner merchant easysea.org. Your purchase of the device is a contract between you and that merchant, and their terms govern price, delivery, warranty, returns, and refunds. Your statutory rights as a consumer are not affected by these Terms. Please contact the merchant about a device order, and contact us about the Service.
Anchor watch and the core safety alarms are part of every account. They are available at the standard level of access and are not conditional on owning a GOAT device. Their availability does not make them reliable — see Section 11.
If we introduce paid access to the Service in future, we will publish the terms and the price before they take effect, and they will not apply to you unless you agree to them.
As a user of the Service, you agree to:
Some features of the Service let you create, publish, and share content with other users — including boat and voyage names, journey stories, photos, comments, anchorage reviews, and profile information (collectively, "user-generated content"). You are solely responsible for the content you submit, and you must have the rights to share it.
There is zero tolerance for objectionable content or abusive behavior. You agree NOT to submit, publish, or share content that:
We provide tools for every user to keep the community safe. You can report objectionable content or abusive users, block users so you no longer see their content, comments, or profile, and delete your account and associated content at any time from the app settings.
We review every report. Objectionable content will be removed, and users who submit it or engage in abusive behavior will have their accounts suspended or terminated — within 24 hours of the report being received. We may take these actions with or without notice, at our sole discretion. Blocking or removal by other users, and any moderation action we take, is in addition to the termination rights described in Section 16 (Termination).
The Service allows you to share access to your vessel's data with other users. When you share access, you grant those users the ability to view your vessel's telemetry data, position, and status. You are responsible for managing who has access to your vessel's data and may revoke access at any time. We are not responsible for how shared users may use the data they view. Sharing your vessel with another person does not make that person a watchkeeper, and you must not treat someone else's access to your data as a watch being kept on your vessel.
The GOAT device remains your property after purchase. However, the software running on the device is licensed, not sold, and is subject to these Terms. The device receives automatic over-the-air (OTA) software updates. By using the device, you consent to receiving these updates, and you accept that an update may change how the device behaves and may briefly interrupt its operation, including any monitoring or alarm function running at the time.
The GOAT device is not certified, approved or type-approved marine equipment. It is not designed, built or tested to any marine safety or navigational equipment standard, and it does not satisfy any legal requirement to carry equipment on board. It must not be installed as a replacement for, or connected in any way that could disable, degrade or interfere with, your vessel's navigation, communication or safety systems. We recommend installation by a qualified marine electrician.
You are responsible for the physical installation of the GOAT device on your vessel. We are not liable for any damage caused by improper installation, electrical issues, or incompatibility with your vessel's systems. Sections 10 to 14 apply to the GOAT device in the same way as to the rest of the Service.
All intellectual property rights in the Service, including the software, design, branding, and documentation, are owned by MDONZELLI LTD. Your use of the Service does not grant you any ownership rights. Your vessel data remains your property; we claim no ownership over your telemetry data, voyage logs, or other content you generate through the Service.
SV.GOAT is an informational tool. It collects data from sensors and services, and presents that data to you. That is all it does. Understanding this Section is a condition of using the Service.
What the Service is not:
The Service must never be used as your only means of anything. In particular, and without limiting that general rule: it must not be your only anchor watch; it must not be your only alarm; and it must never be treated as a replacement for, or a reason to reduce, a proper lookout and human watchkeeping by sight and hearing at all times, including night watches. Maintaining a proper lookout is a legal duty under Rule 5 of the International Regulations for Preventing Collisions at Sea (COLREGs), and nothing in the Service reduces, satisfies or discharges that duty. If you would have set a watch without SV.GOAT, set the same watch with it.
You remain solely responsible for your vessel. The master or skipper of a vessel is at all times solely responsible for the vessel, everyone on board, its navigation, its anchoring and mooring, its safety equipment, and its compliance with the COLREGs and all other applicable laws and regulations, including those of its flag state and of any port or coastal state. Nothing in the Service, and nothing we say about it anywhere, transfers, shares, reduces or discharges any part of that responsibility. Every decision you make remains your decision.
SV.GOAT is pre-release, prototype software, and the GOAT device is pre-release, prototype hardware. The Service is under active and continuous development, it is made available to you for testing and evaluation, and it is not a finished, commercially mature or field-proven product. In substance you are a tester. By using the Service you accept it in that condition, and you accept the standard of reliability that comes with it.
What that means in practice:
You accept prototype-level failure as the agreed standard of performance for the Service. A failure of the kind described above is not a defect in what you were promised, is not a breach of these Terms, and is not a basis for any claim — it is the expected behaviour of a prototype, and it is the basis on which the Service is made available to you at all. If you are not willing to use the Service on that basis, you must not use it.
Everything said in this Section applies to every part of the Service. The descriptions below say, feature by feature, where the information actually comes from and what it must not be mistaken for. They are illustrative, not exhaustive — a feature we have not named here is not warranted, promised or made reliable by being left out, and nothing in this list adds a warranty to anything.
Weather forecasts and storm prediction. The forecast is supplied by a third-party public weather service over the internet, and the storm indication is a calculation your own phone makes from your vessel's barometric pressure and wind readings, together with that forecast when it can be reached. It is not a meteorological service, and it is not an official marine forecast, a Navtex message, a gale or storm warning, or a coastguard broadcast of any kind. It must never replace official marine forecasts and warnings: obtain those from the proper source for your area, before you sail and while you are at sea.
AIS radar. It displays only vessels that your own vessel's AIS receiver picks up and passes to the app — there is no shared, global or terrestrial vessel feed behind it, and it shows nothing at all when the app cannot reach your boat. A vessel with no AIS, with AIS switched off, out of range, or not received for any other reason simply is not there, and the closest-approach and time-to-closest-approach figures are estimates calculated from the data received. It is not an AIS transceiver, it is not radar, and it is not a collision-avoidance system: never read the absence of a target as the absence of a vessel, and never let it replace a proper lookout, your own radar and AIS, or the COLREGs.
Navigation instruments — depth, wind, speed, heading and position. These are values relayed from your own vessel's sensors over your own boat's network, and shown to you unchanged. They are not navigational equipment and must not be used for navigation; a displayed depth is not an indication that there is safe water under you. A sensor that has failed or frozen keeps reporting its last value, which on screen looks exactly like a live one — navigate on your own instruments, your charts and your own eyes.
Dashboard cards and other readouts. Cards are tiles you configure yourself against whichever data path you choose on your boat, and they display whatever that path reports. A card can be stale, uncalibrated, pointed at the wrong device, wrongly scaled, or show nothing at all, and none of that is necessarily visible from the card. A number on the screen is not a measurement you may rely on — check anything that matters against the instrument or the gauge itself.
Anchor watch, alarms and alerts. These are on-device alarms driven by the same sensor and position data described above, and they are available on every account (see Section 4). Being available is not the same as being reliable. How they can fail, and why silence never means safety, is set out in Section 11; what you must still do yourself is set out in Section 13.
Performance polars and the sailing coach. The polar is a theoretical model calculated from the specifications you entered, adjusted by estimates learned from your own sailing and, if you opt in, by anonymous data from broadly similar boats. Targets, percentages and coaching lines are estimates about that model, not measurements of your boat, and they say nothing about what is safe in the conditions you are in. They are not advice, and they must not drive a routing, passage-planning or safety decision. Any route the app suggests is a speed calculation over a coarse bundled network of sea passages — it is not a passage plan, it does not use charts, and it knows nothing about depth, your draught, hazards, traffic separation or restricted areas.
Position map, tracks and voyages. This is a historical record kept for your own interest, assembled from position fixes that may be missing, delayed or wrong; where there is a gap the map may draw an estimated line between two points, and that line is not where your vessel actually went. Tracks and voyages can also be edited and deleted by you. It is not a navigational record, it is not evidence of where your vessel safely was, and a track must never be treated as a route that is safe to follow again.
Anchorages. The anchorage pins are a catalogue compiled in advance from public datasets and short written descriptions prepared offline; the depths, holding and shelter shown are indications from that data, which may be old, incomplete or wrong for the spot you are actually in. It is not a chart, a pilot book or a survey, and it is not local knowledge. Choose your anchorage on your own charts, your own pilot and your own assessment of the holding, depth, shelter, tide and forecast.
Tanks, batteries and electrical. Levels, voltages, currents and state of charge are what the sensors and monitors fitted to your own boat report, scaled by the capacities and specifications you entered yourself. They are estimates that depend entirely on a working, correctly calibrated and correctly configured installation. Never plan fuel or fresh water on them, and never make a battery, charging or electrical safety decision on them — check the tank, the gauge and the installation yourself.
Marine intelligence and energy planning. Solar and consumption forecasts, battery projections, water runway, and suggested windows for running appliances are calculations your phone makes from your boat configuration, its sensor readings and the weather forecast. They are predictions about the future built on figures you entered: a wrong specification, an absent sensor or an old forecast produces a confident-looking number that is simply wrong. They are suggestions to consider, not advice, and never a basis for relying on your fuel, water or power endurance.
AI First Mate. This is a conversational assistant built on a third-party large language model, with access to some of your boat data. It generates text automatically, it can be incomplete or wrong, and it can state something false with complete confidence. It is not professional advice of any kind — not engineering, electrical, mechanical, meteorological, medical or seamanship advice — and it is never a substitute for inspecting your own systems or asking a qualified person.
Remote monitoring and the web dashboard. When you are away from your vessel you are looking at a snapshot that was uploaded the last time the boat had a working internet connection — typically no fresher than about an hour, often much older, and in offshore mode the boat stops uploading altogether. The absence of data is not the absence of a problem. A screen that shows nothing wrong may simply mean nothing is being received, and seeing nothing wrong is never evidence that nothing is wrong.
Marine radio frequencies. This is a static reference list included for convenience. It is not an official publication, it is not maintained as one, and it may be out of date or wrong for the area you are in. Use the official publication for your area for distress, calling and safety procedures.
Community, sharing, crew and nearby friends. Feeds, shared vessels, follower access, crew lists, visited-country flags and nearby-friend notices show information contributed by you and by other users; we do not produce, check or verify any of it, and any position shown to another user is deliberately approximated. Never rely on it to locate a vessel or a person, and never treat it as a check that someone is safe or has arrived. If you are concerned for someone, contact them or the appropriate authority.
THE SERVICE IS PROVIDED "AS IS" AND "AS AVAILABLE", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED. TO THE FULLEST EXTENT PERMITTED BY LAW WE EXCLUDE ALL IMPLIED WARRANTIES, CONDITIONS AND TERMS, INCLUDING MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A PARTICULAR PURPOSE, ACCURACY, AND NON-INFRINGEMENT.
We do not warrant, promise or guarantee that any information the Service shows you is accurate, precise, complete, current, or available at all. Data may be wrong, stale, missing, delayed, duplicated or misleading, and it may look normal when it is not. We do not warrant that the Service will be uninterrupted, timely, secure or error-free, that it will work on your device, or that any defect will be corrected.
Alarms may fail to fire. Alarms may fire late. Alarms may fire when nothing is wrong. You must never assume that silence means safety.
There are many reasons the Service, and any alarm within it, can fail. They include, without limitation:
The Service is under continuous development and is provided on an evolving basis. It changes. Features may be added, changed, withdrawn, or stop working, and that can happen without notice. An update to the apps or to the GOAT device may change how something behaves, including behaviour you have come to rely on. Something that worked yesterday may not work today. Do not assume continuity: before you rely on any part of the Service, check for yourself that it is still working the way you expect.
We do not monitor your vessel. No person at MDONZELLI LTD watches your data, and we have no obligation to notice, investigate, act on, or tell you about anything the Service shows or fails to show — including an alarm, a fault, an outage, or a period during which your vessel sent no data at all.
Weather forecasts, storm indications, environmental data, charts and map imagery, information about other vessels, and content contributed by other users are supplied by third parties or by other users. We do not produce, verify or endorse them. AI-assisted insights are generated automatically, may be wrong or incomplete, and must be treated as suggestions to consider — never as advice to follow, and never as a statement of fact about your vessel.
By using the Service you confirm that you have read and understood Sections 10 and 11, and you agree that:
Nothing in this Section excludes or limits our liability for fraud or fraudulent misrepresentation, and nothing in it affects any right you have as a consumer that cannot be excluded or limited by law.
The Service does not take on any part of your job. It adds to what you already do; it never replaces it. Keeping your vessel safe is your work, and it stays your work while you use the Service. This Section sets out what you must do. These are obligations you take on by using the Service, not suggestions.
You agree that you will:
These duties apply whether you are aboard or ashore, and whether or not the Service appears to be working normally. Failing to do any of these things is use of the Service contrary to these Terms, and Section 14 (Limitation of Liability) applies to any loss or damage that results.
First, what we never exclude. Nothing in these Terms excludes or limits our liability for: (a) death or personal injury caused by our negligence; (b) fraud or fraudulent misrepresentation; or (c) any other liability that cannot lawfully be excluded or limited. If you are a consumer, you have legal rights that these Terms do not affect, and nothing here takes them away or requires you to give them up.
Subject always to the paragraph above, and to the maximum extent permitted by law, we are not liable to you for:
We provide access to the Service free of charge and take no payment from you for it. We therefore do not set a monetary cap on our liability in these Terms: the exclusions set out above define the limits of what we are responsible for, and our liability for anything that is not excluded is determined by law.
If you use the Service for a business purpose — including commercial charter, yacht delivery, training, hire, or any other commercial operation — you do so entirely at your own risk, and we are not liable to you for loss of profit, loss of business, business interruption, or loss of business opportunity. The consumer protections referred to in this Section apply only if you are acting as a consumer.
Each part of this Section operates separately. If any part of it, or of Sections 10 to 13, is held by a court to be unlawful or unenforceable, that part is to be treated as removed and the remaining parts continue to apply.
You agree to indemnify and hold harmless MDONZELLI LTD, its officers, directors, employees, contractors and agents against any claim, demand, proceeding, loss, liability, cost or expense (including reasonable legal fees) brought by a third party and arising out of or in connection with:
This does not apply to the extent the claim arises from our own negligence, our breach of these Terms, or our wilful default. If you are a consumer, this Section does not require you to indemnify us for anything that is our fault, and it does not affect your statutory rights.
You may terminate your account at any time by deleting it through the app settings or by contacting us. We may suspend or terminate your access to the Service at any time for violation of these Terms, with or without notice.
Upon termination, your right to use the Service ceases immediately. We will delete your data in accordance with our Privacy Policy. Sections 10 to 15, and any other provision intended to survive, continue to apply after termination.
These Terms shall be governed by and construed in accordance with the laws of England and Wales, without regard to its conflict of law provisions. Any disputes arising under these Terms shall be subject to the exclusive jurisdiction of the courts of England and Wales. If you are a consumer resident outside England and Wales, this does not deprive you of the protection of the mandatory consumer law of the country where you live, or of any right you have to bring proceedings in the courts of that country.
We reserve the right to modify these Terms at any time. We will notify you of material changes by posting the updated Terms on this page and updating the "Last updated" date. For significant changes, we may also notify you via email. Your continued use of the Service after any changes constitutes acceptance of the updated Terms.
Your use of the Service is also governed by our Privacy Policy, which is incorporated into these Terms by reference. Please review it to understand how we collect, use, and protect your data.
If you have any questions about these Terms, please contact us:
See also: Privacy Policy