Frequently asked questions

Please, take a minute to see if your question is answered in the FAQ of the device you are having trouble with. If not, you can contact us on support@sentinelmarine.net to help with technical support, or use our online contact form for sales related inquires.

Can I switch the subscription plans?

Yes, you can upgrade your subscription plan using our online subscription management page.

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Is it possible to share my routes on social media?

Sure, you can easily share your past or current routes with your friends and family via e-mail or on your social media.

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What does the subscription cover?

The entire service, you have zero additional costs. What about the next year? You will easily renew the subscription in the online shop.

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How do I buy a Sentinel product?

If your boat does not already come equipped with Sentinel Telematics (see our Partners page), you can purchase Sentinel products via our Delears network. For more information please contact us at info@sentinelmarine.net

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How do I start using my Boat Monitor?

On your phone or tablet, install the application "Sentinel - your boat, online" which you may download from the App or Play Store (for Android or iOS respectively). Use the app to create an account (or login). Scan the QR code on the front side of the device. Follow the on-screen instructions to complete the activation process and enter information about your boat.

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Is the subscription mandatory to start using my Boat Monitor?

Yes. A subscription is required to use your Boat Monitor.

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Where do I download the Sentinel app?

If you have an Apple device, click here. If you have and Android device, click here. We also have a web app at web.sentinelmarine.net.

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How can I connect the app with the device?

Use the smartphone or tablet to scan the QR code on the Boat Monitor, and follow the instruction on screen. The process should only take you a moment.

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Which countries are covered by the subscription?

European coverage:

  • Austria
  • Belarus
  • Belgium
  • Bulgaria
  • Croatia
  • Cyprus
  • Czech Republic
  • Denmark
  • Estonia
  • Finland
  • France
  • Germany
  • Greece
  • Hungary
  • Ireland
  • Italy
  • Latvia
  • Liechtenstein
  • Lithuania
  • Luxembourg
  • Macedonia
  • Malta
  • Netherlands
  • Norway
  • Poland
  • Portugal
  • Romania
  • Serbia
  • Slovakia
  • Slovenia
  • Spain
  • Sweden
  • Switzerland
  • United Kingdom

Worldwide coverage:

  • Albania
  • Australia
  • Azerbaijan
  • Canada
  • China
  • Congo (Dem. Rep.)
  • Egypt
  • France Caraibe
  • Gibraltar
  • Hong Kong
  • Iceland
  • India
  • Indonesia
  • Israel
  • Japan
  • Korea Rep.
  • Kosovo
  • Malaysia
  • Moldova
  • Montenegro
  • New Zealand
  • Nigeria
  • Qatar
  • Reunion
  • Russia
  • Singapore
  • South Africa
  • Sri Lanka
  • Taiwan
  • Thailand
  • Turkey
  • Ukraine
  • United Arab Emirates
  • United States
  • Vietnam
  • and all the countries from the European coverage


Please be aware that coverage may change without notice due to factors outside Sentinel's control.

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How much current does Boat Monitor actually use?

Boat Monitor consumes 1 Ah during a day of sailing and only 24 mAh while your boat is moored. The impact of Boat Monitor on your boat batteries should not be noticeable.

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Will Sentinel Boat Monitor use the power from my battery?

Yes, but very little. With a 100 Ah battery the Boat Monitor will work more than 6 months (this is without charging it).

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How will I be alerted in case something happens to my boat?

You will receive a mobile push notification. You should be logged-in to the Sentinel app and have access to WiFi or 3G/4G.

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How precise is the GPS tracking?

GPS Tracking frequency is dynamic - it depends on whether the boat is turning, going straight or not moving at all. The resulting tracks are very detailed as can be seen in this image:

For performance reasons the points may be slightly sparser when displaying the routes on your computer, phone or tablet. You can download the full track using the "Download GPX" button on any route in the web app.

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As boat owner, how do I accept a "GUEST REQUEST"

When a guests scans the QR code and creates an account, you will be sent a guest request, which will allow the guest to see the routes and other information about the boat. You may confirm or reject the guest request by clicking on "Accept" or "Reject" buttons in the Guests section of the web application or within the application on your mobile device.

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As a "guest user", how do I start using the application?

On your phone or tablet, install the application "Sentinel - your boat, online" which you may download from the App or Play Store (for Android or iOS respectively). Use the app to create an account. Scan the QR code on the front side of the device or provided by the "owner" of the boat.

Upon completion, the wizard will send a "guest request" to the boat owner for confirmation. After the request is accepted you will be able to start using the application.

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Where can I find the registration and serial number of the device?

The registration code is embedded within the QR code. The serial number (SN) can be found on the front face of the device.

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Where/How should I position the device to ensure high quality GPS positioning?

The correct device orientation can be found in your device's installation manual. Do not place the device under metal enclosures.

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I can't login to the application

Please verify that:

  • You are properly connected to internet (WiFi, 3G or 4G)
  • You are using correct credentials (username and password)

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I am receiving notifications that the boat has moved. Why?

You may have activated the "anchor alarm" functionality, and the Sentinel service is warning you that your boat has moved from its initial position.

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What happens when the device has low internet reception (low 3G or 4G signal)?

The device will store the captured data (routes, battery status, alarms, etc) on the device until internet connection is secured. Then, the data will be uploaded and you will be able to see it in the Sentinel apps.

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My application is not showing fresh boat's data

You may be in an area without mobile Internet coverage (3G or 4G - LTE). The information will appear on your device when strong mobile signal is available.


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After completing the activation process (registering the device and creating an account) there is still no data visible in the mobile app.

One of the following may be happening:

  • The device has not yet started sending data to the server. In some cases, it may take up to 15 minutes after the device is activated and turned on for the first data point to appear.
  • The device may not be connected to an Internet network.
  • The SIM card is not yet activated. Please contact Sentinel support.

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The route has been drawn over land.

Due to the sampling frequency it may occur that the route is occasionally (but rarely) drawn over land. If this occurs frequently, please inform the Sentinel technical support using the Report Issue button in the app.

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Is there customer support available in case I’ll have any add additional questions?

Of course. To access support it is best that you use the "Report Issue" button in the app. Alternatively, you can write as on suport@sentinelmarine.net.

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The web application is not rendered correctly in Internet Explorer

You may have an outdated browser. Try upgrading your browser to the latest version.

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How will I be informed that my subscription needs to be renewed?

3 weeks before your subscription expires you will receive an email with instructions on how to renew your subscription. At the same time, both the mobile and web application will show an informative banner.

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How do I renew my subscription?

Upon receiving the email that your subscription is about to expire, you will also be able to renew your subscription. In the web application, click on the Account dropdown menu and select "My Subscriptions". From there you will be able to manage the subscription plans for all your devices. After completing the renewal process for a device, future renewals are automated. You will receive an email notice before your card is billed every year.

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Can I modify my subscription plan?

You can customize your subscription plan to fit your needs at any time. You can choose from different coverage areas (Europe, Worldwide), upgrade the number of allowed sensors and switches, and choose between additional features such as CZone Switching and Alerts and Sentinel Plus.

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Can I downgrade my subscription plan?

Yes. The feature you have chosen to downgrade will continue working until the end of the active subscription term, but will not be extended with successive automatic renewals.

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What happens if I allow my subscription to expire?

After a brief grace period monitoring functionality will be suspended. Renewal of an expired subscription incurs and additional re-activation fee.

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I can't find the option to renew my subscription, please help!

You will be able to renew your subscription 21 days before your subscription expires. At that time, you will also receive an email with instructions on how to proceed. If you did not receive the email, and the option is still not present, please contact Sentinel support.

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What if I don't use the activation PIN to activate my subscription?

If you do not activate the service within 1 year of purchase, your activation PIN will expire. You will have to buy a new subscription online.

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Can I disable automatic renewals?

Yes, you can do so at any time. Any existing subscription will continue working until expiry.
To disable automatic renewal, in the web application click on the Account dropdown and select "My Subscriptions". Then, use the option "Manage automatic renewal" corresponding to your device.

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Can I terminate my subscription?

You can cancel automatic renewal of your subscription plan at any time. Your device will continue working until the end of your subscription. If you wish to completely stop using the Sentinel services, and stop monitoring at once, delete the boat from the Sentinel application and unplug the monitoring device from power.

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What payment options are supported?

We currently support Mastercard, Visa and PayPal.

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Will taxes be included in my invoice?

Sentinel is required by law to apply tax charges, which are based on the location of your residence you provide in the billing details.

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How do I add a VAT ID number to my account?

We currently do not support adding VAT ID when using our online subscription renewal process. If you are a VAT-exempt business and need to renew a subscription please contact Sentinel support.

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What is the difference between CZone Lite and CZone Unlimited?

The CZone addon allows you to remotely switch selected CZone circuits and receive alerts from the CZone system. Two flavours of the addon are available: Unlimited and Lite

The CZone Unlimited addon allows you to:

  • Receive all alerts generated by the CZone system.
  • Select and switch an unlimited number of CZone circuits. These are excluded from the subscription plan size limit.

The CZone Lite addon allows you to:

  • Receive all alerts generated by the CZone system. Some restrictions apply, see below *.
  • Select and switch** a limited number of CZone circuits. Each selected switch takes one slot in your subscription plan size limit.

* The behaviour of CZone alerts is different between Lite and Unlimited addons. With Unlimited, alerts that are cleared in the CZone system but triggered again will fire a push notification to the Sentinel app automatically. With Lite, alerts need to be cleared manually in the Sentinel app in order to receive new alerts from the CZone system (from same source).

** When using CZone Lite, toggling a circuit in the CZone system will sync to the Sentinel app no later than every 20 minutes. Toggling a switch in the Sentinel app is reflected immediately in the CZone system. With Unlimited, the sync is always immediate.

The CZone addon is not needed if you are only interested in monitoring CZone circuits (without switching and CZone alerts).

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