

                  Waterlinked DVL A125 
                
DVL A50 – The world’s smallest DVL
The Water Linked A50 is the world’s smallest Doppler Velocity Log (DVL). By utilising the latest technology Water Linked have been able to reduce the size and cost of the DVL, while delivering a level of performance previously not possible in a product so small.
Key features
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5cm – 50m altitude range 300m or 600m depth rated
 
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Ethernet and Serial interface
 
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Imbedded computer for standalone operation
 
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AHRS for increased accuracy
 
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Extremely small size enabling easy mounting and integration 
 - Web GUI with comprehensive diagnostic features
 
More Information
Ground-breaking performance-to-size ratio
Capable of maintaining bottom lock at speeds of up to 9 meters per second, and with a maximum altitude of 125m, the A125 is the perfect DVL for ROVs, USVs and AUVs. The ability to also operate at an altitude as low as 5cm means the DVL will work at extremely short range as well as long range.
Doppler Velocity Log (DVL)
Designed and developed to make high specification DVL performance available at an affordable price, while ensuring it’s simple for anyone to use. Enabled by proprietary transducer design, developing advanced algorithms and removing every millimetre of space that’s not absolutely needed.
While the size and weight of the A125 allows this DVL to be used on the smallest of vehicles, having a depth rating of 3000m means this high performance DVL can also be used on vehicles that operate at these extreme depths.
Although a DVL is typically integrated fully to the vehicle for enhanced control, the integrated Attitude and Heading Reference System (AHRS) within the A125 allows the DVL to be used for dead reckoning positioning. This feature allows the A125 to generate an accurate track plot of the vehicles movements without the need to fully integrate with the vehicle control system.
Key features
- 
5 cm – 125 m altitude range
 
- 
600 m or 3000 m depth rated
 
- 
Ethernet and Serial interface
 
- 
Imbedded computer for standalone operation
 
- 
AHRS for increased accuracy
 
- 
Extremely small size enabling easy mounting and integration
 
- Web GUI with comprehensive diagnostic features
 
When size matters
Thanks to the size and weight of the A50, the smallest ROVs and AUVs can now benefit from increased navigation and control. This allows these small vehicles operating in water depths down to 600m to perform tasks that would have previously required a larger and more expensive vehicle.
Although a clear benefit for small vehicles, larger vehicles requiring high accuracy navigation features also benefit from the size, weight, and cost benefits of fitting this high accuracy DVL.
While typically integrated fully to the ROV or AUV for enhanced control, the integrated Attitude and Heading Reference System (AHRS) within the A50 allows the DVL to be used for dead reckoning positioning. This feature allows the A50 to generate an accurate track plot of the vehicles movements without the need to fully integrate with the vehicle control system.
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Product details 
Delivery Details
Free UK Delivery is available on all orders over £100.
Orders under £100 have a fixed delivery price of £8.
Delivery takes around 4-5 weeks to most UK addresses, except for in stock items, as below.
In-Stock Items Only - Delivery will be made in 2-3 working days. Next Day Delivery is also available to UK mainland addresses for £30 per order, order By 12pm, Mon to Fri to receive next day.
Conditions - Some locations outside mainland UK may incur additional charges, which are representative of the extra cost that we get charged by the courier. Delivery is available to Europe and some Worldwide locations. Contact us directly on sales@alphageouk.com if you need any help or have questions, before you order.
If you have any questions, please ask them using our live chat for immediate answers or you are always welcome to use our Contact Us form. We'll get back to you as soon as possible.
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Shipping Information
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Customer Support
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FAQ’s
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Contact Us
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FAQs 
Please read our FAQs page to find out more.
What does each product package include?
Each listing clearly states what’s included in the box (e.g. main unit, batteries, charger, cables, software license, spare parts, accessories). If you’re unsure, check the “Package Comparison” section of the product page or contact us for confirmation before purchase.
How long does delivery take, and when will my order ship?
- UK deliveries: 2–5 business days under normal stock conditions.
 - Pre-order / backorder items: Typically around 4 weeks (or as otherwise specified).
 - Orders placed before 2 pm (weekdays) are dispatched the same day when in stock.
 - Free UK delivery is available for orders over £100.
 
What warranty and support do you offer?
- Every product comes with a 12-month warranty covering manufacturing defects under normal use.
 - During the warranty, we provide repairs or replacement of faulty parts, as well as technical support.
 - After the warranty period, we continue to offer repair, servicing, and parts support.
 - Our UK repair centre handles original parts and full testing.
 
Can I get a demonstration, training or customized solution?
Yes - we offer product demonstrations (in person or virtually), webinars, and one-on-one training to help you get up to speed. We also custom-configure or adapt solutions (e.g. integrating sensors, payloads, alternate configurations) to suit your specific project needs.

