Company Active LTD

Company profile

Sonardyne International Limited

Sonardyne | Underwater technology and engineering services

Sonardyne have been engineering the future of underwater technology for over 50 years. Track, monitor, image, survey, navigate.

CRN
01299452
Founded
1977
Age
49

Overview

Legal name
SONARDYNE INTERNATIONAL LIMITED
Region
South East England
Registered address
OCEAN HOUSE BLACKBUSHE BUSINESS PARK
SAXONY WAY
YATELEY
HAMPSHIRE
GU46 6GD
Insolvency history
No

Corporate ownership

Updated 06 Jun 2026 16:52

2 levels 1 ultimate controller Controls 2
1
Company Active LTD
Sonardyne International Limited
CRN 01299452
2
Direct controller Active LTD
Covelya Group Limited
CRN 12493148
3
Ultimate controller Active LTD

Company events

Reference milestones and recent Companies House filing stream events.

8 events
30 Sep
2027

Accounts due

Accounts Due

Next accounts due date

07 Oct
2026

Confirmation statement due

Confirmation Due

Next confirmation statement due date

02 Apr
2026

Accounts With Accounts Type Full

Accounts PDF pending

AA | Transaction MzUxMjcxNzg1N2FkaXF6a2N4 | Paper/PDF filed

Published 03 Apr 2026 22:58

31 Dec
2025

Accounts filed

Accounts

Last accounts made up date

23 Sep
2025

Confirmation statement filed

Confirmation

Last confirmation statement made up date

27 Sep
2024

Accounts With Accounts Type Full

Accounts Awaiting analysis

AA | Transaction MzQzNzU0MjQxOGFkaXF6a2N4

Published 27 Sep 2024 02:50

04 Apr
1977

Legacy

Address

287 | Transaction MzUyOTY2NzU2MmFkaXF6a2N4 | Paper/PDF filed

Published 01 Jul 2026 04:32

21 Feb
1977

Incorporated

Inception

Company registered at Companies House

Public funding

11 awards
First funded
2015
Funded years
2015, 2017, 2021, 2022, 2024
Age at first award
38 years

Projects

2024 Collaborative R&D Lead participant

LOTIS - Lidar fOr deTailed Inspection of underwater Structures

1 Feb 2024 to 30 Apr 2026

Awarded
£164,726
Total cost £329,451

High resolution 3D maps are required for an increasing number of key subsea applications from installation and operation of offshore wind energy, asset decommissioning, environmental monitoring, and defence. Quantum photonic detection technologies can offer a step change in the resolution, accuracy, coverage, and speed of generation of these maps compared...

2022 Collaborative R&D Lead participant

Underwater Single Photon Imaging System

1 Jul 2022 to 31 Mar 2025

Awarded
£361,324
Total cost £722,649

High resolution 3D maps are required for an increasing number of key subsea applications from installation and operation of offshore wind energy, asset decommissioning, environmental monitoring, and defence. Quantum photonic detection technologies can offer a step change in the resolution, accuracy, coverage, and speed of generation of these maps compared...

2021 Collaborative R&D

Squads of Adaptive Robots (SoAR)

1 Oct 2021 to 30 Sep 2023

Awarded
£206,594
Total cost £413,189

SoAR is focused on delivering a fundamental shift in the use of marine robotics through the networking of heterogeneous fleets of Autonomous Underwater Vehicles (AUV) and uncrewed surface vehicles overseen by a fleet level autonomy engine capable of adaptive mission planning. The existing paradigm of a single high-power vehicle with expensive support vess...

2021 Collaborative R&D

Subsea Enhanced Autonomous Mapping (SEAMless)

1 Oct 2021 to 30 Sep 2023

Awarded
£70,335
Total cost £140,670

Subsea inspection and surveys require highly accurate mapping to support activities such as site assessment, detailed inspection, and asset maintenance. Data collected can be leveraged through the advancements and application of underwater robotics and autonomous systems to support future industry grow. By improving data accuracy and utility, operational ...

2021 Collaborative R&D

(HeRO) Hybrid-enabled Remote Operations

1 Sep 2021 to 31 Mar 2022

Awarded
£11,268
Total cost £22,535

HydroSurv - an impact-driven innovator in Uncrewed Surface Vehicles (USVs) and marine geospatial cloud applications, is collaborating with Sonardyne International Ltd, Dynautics Ltd and Fischer Panda UK Ltd to develop an optimised hybridisation solution for remotely operated, uncrewed vessels. Combining innovations in human-assisted autonomous control of ...

2021 Collaborative R&D

HydroSurv - REAV-40 Offshore Wind Utility Extension

1 Apr 2021 to 31 Mar 2022

Awarded
£58,574
Total cost £117,149

HydroSurv Unmanned Survey (UK) Ltd, (_HydroSurv_) is building upon the successes of its '_Robotics for a Safer World_' Demonstrator project by developing and showcasing a transformative environmental monitoring solution for the offshore renewable energy sector in collaboration with Sonardyne International Ltd - a world-leading underwater acoustic position...

2017 Collaborative R&D Lead participant

Precise Positioning for Persistent AUVs

1 Dec 2017 to 29 Feb 2020

Awarded
£501,706
Total cost £1,003,342

"This project will improve the navigational accuracy of autonomous underwater vehicles (AUVs) helping to further reduce the dependency on offshore infrastructure for wide area surveys of challenging marine environments. This will be achieved by a combination of three novel techniques: 1. Using enhanced autonomy to increase the accuracy of Long BaseLine (L...

2017 Feasibility Studies Lead participant

AutoMINDER – Autonomous MarIne Navigation in Denied EnviRonments

1 Dec 2017 to 30 Nov 2018

Awarded
£86,031
Total cost £172,062

Fault tolerant, high availability navigation systems used in the oil and gas industry today can already be considered automated. However, there are always at least two people on watch on typical mobile offshore drilling unit (MODU) as the Dynamic Positioning systems still rely on human intervention to take action when automatic fault detection and decisio...

2017 Collaborative R&D Lead participant

Sound speed sensor accuracy and stability

1 Aug 2017 to 31 Mar 2018

Awarded
£14,667
Total cost £24,445

An analysis of the performance of the transducer used in our sound speed sensor, particularly under conditions when deployed subsea and investigation into any physical changes that may occur.

2017 Feasibility Studies

Autonomous pipeline survey system

1 Feb 2017 to 31 Jan 2018

Awarded
£7,830
Total cost £15,660

ASV, NOC and Sonardyne are working together to deliver an innovative and game changing offshore pipeline survey system. Utilising the benefits of autonomous vehicles on the surface and underwater to make a step change in operational cost and safety. ASV's autonomous surface vehicle C-Enduro will provide navigational updates and mission planning to NOC's A...

2015 Collaborative R&D

Autonomous Surface / Sub-surface Survey System

1 Jul 2015 to 30 Jun 2018

Awarded
£224,060
Total cost £448,120

This programme combines unmanned surface vessels (USVs), unmanned underwater vehicles (UUVs) and novel communications technology into an integrated system to provide a means of conducting low cost shore based full water column marine surveys. Success will accelerate the wider adoption of unmanned systems and will enable long term, low-cost survey and moni...

Product types

Collaborative R&D Feasibility Studies