Company lists · Data refreshed November 2026

Top 25 Underwater maintenance services based in the United Kingdom

RevenueBase identified 200 company matches for underwater maintenance services associated with the United Kingdom as of November 2026 and tracks 2,736 professional contacts across them, including 805 with verified work emails. Aberdeen is the largest hub.

This list covers company matches for underwater maintenance services associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 6, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Nov 6, 2026 How this list was built
200Companies
2,736Contacts tracked
805Verified emails
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The 25 largest underwater maintenance services based in the United Kingdom

Ranked by team size
Top 25 of 200 company matches for underwater maintenance services based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchBurntisland, United KingdomHQ recorded Nov 6, 2026501-1,000427 contacts →

Exact match

“Briggs Marine is a leading provider of marine and environmental services, specialising in port and marine operations, subsea and environmental support and vessel charter.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchKintore, United KingdomHQ recorded Nov 6, 202611-50138 contacts →

Exact match

“RELIABLE | RESOURCEFUL | READY We continually raise the bar by challenging ourselves and our clients to enable safe and efficient performance.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchBirkenhead, United KingdomHQ recorded Nov 6, 202651-200105 contacts →

Exact match

“Star International specialises in keeping vessels safe and compliant.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchChesterfield, United KingdomHQ recorded Nov 6, 202651-20097 contacts →

Exact match

“Cathelco safeguards your fleet by managing biofouling, ensuring corrosion protection, and generating freshwater Our offering: Ultrasonic Antifouling - Cathelco's DragGone™…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchSandbank, United KingdomHQ recorded Nov 6, 202651-20093 contacts →

Exact match

“Founded in 1992, Shearwater Marine Services have since grown to become a highly respected topside and sub-surface marine engineering service provider.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchSouthampton, United KingdomHQ recorded Nov 6, 202651-20087 contacts →

Exact match

“Southampton Marine Services Ltd was established in 2004 and specialises in ship / work boat building, vessel repair and marine engineering; we trade in four markets - Commercial…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchHolyhead, United KingdomHQ recorded Nov 6, 202651-20083 contacts →

Exact match

“Holyhead Towing Company (Est.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchOldmeldrum, United KingdomHQ recorded Nov 6, 202651-20081 contacts →

Exact match

“James Fisher Offshore (JFO) is an international supplier of marine back deck, specialist subsea equipment and engineering services supporting the global subsea contractors across…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchTyne & Wear, United KingdomHQ recorded Nov 6, 2026201-50077 contacts →

Exact match

“UK Docks offers dry docks, afloat repair berths and specialist boat repair facilities throughout the UK and employs specialist service engineers for vessel repair, construction…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchEllon, United KingdomHQ recorded Nov 6, 202651-20071 contacts →

Exact match

“Film-Ocean provides innovative subsea solutions to the global offshore energy industry.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchPontypridd, United KingdomHQ recorded Nov 6, 202651-20056 contacts →

Exact match

“EDWARDS DIVING SERVICES LIMITED (EDS) is a specialist Marine & Civil Engineering company located in South Wales, United Kingdom.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchFarlington, United KingdomHQ recorded Nov 6, 202651-20049 contacts →

Exact match

“Marlin Environmental Services is a leader in specialist environmental cleaning, waste management, engineering and confined space services for the maritime sector; including…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchRochester, United KingdomHQ recorded Nov 6, 202651-20049 contacts →

Exact match

“Marine Contractors specialising in: Marine Civil Engineering and Construction.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchAberdeen, United KingdomHQ recorded Nov 6, 202611-5047 contacts →

Exact match

“KD Marine are a commercial diving contractor providing underwater intervention services to the offshore oil and gas industry.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchKintore, United KingdomHQ recorded Nov 6, 202611-5040 contacts →

Exact match

“Marine Technical Limits was established in order to provide support to FPSOs worldwide.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchKirkwall, United KingdomHQ recorded Nov 6, 202611-5038 contacts →

Exact match

“Leask Marine provide an unprecedented range of uniquely developed processes and equipment to support the mobilisation, deployment, installation, commissioning, service and…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchNorthfleet, United KingdomHQ recorded Nov 6, 202611-5037 contacts →

Exact match

“A dynamic, award winning and multi-disciplined specialist contractor, providing civil engineering solutions for marine orientated projects, private and public sector projects.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchTamworth, United KingdomHQ recorded Nov 6, 202651-20031 contacts →

Exact match

“The UK’s leader in pipeline, vessel & structural repair solutions for global offshore/onshore oil and gas operations.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchPlymouth, United KingdomHQ recorded Nov 6, 202651-20026 contacts →

Exact match

“AQM Marine specialises in delivering premium marine services tailored to meet the needs of boat owners, captains, and industry professionals.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchInsch, United KingdomHQ recorded Nov 6, 202611-5021 contacts →

Exact match

“RockSalt Subsea Ltd are Commercial Diving & Remotely Operated Vehicle (ROV) specialists, delivering engineering support and Technical Authority services to the offshore energy and…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchLinton, United KingdomHQ recorded Nov 6, 202611-5021 contacts →

Exact match

“Diving, Survey and Marine Contracting (DSMC).”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchHull, United KingdomHQ recorded Nov 6, 202611-5020 contacts →

Exact match

“Established in 1963, Northern Divers are the oldest established commercial divers in the UK.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchWakefield, United KingdomHQ recorded Nov 6, 202651-20020 contacts →

Exact match

“Hey Service Group: Excellence in Cleaning, Sealing, and Maintenance Hey Service Group is a dynamic, industry-leading organisation dedicated to providing comprehensive solutions…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchPotters Bar, United KingdomHQ recorded Nov 6, 202611-5019 contacts →

Exact match

“Blue Phoenix Deepwater Limited is a 100% Nigerian-owned company with offices in the United Kingdom and Nigeria.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchBarrow-in-furness, United KingdomHQ recorded Nov 6, 202611-5018 contacts →

Exact match

“Diving & Marine civil engineering contractor”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 25 of 200 underwater maintenance services based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 805 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Underwater maintenance services based in the United Kingdom at a glance

As of Nov 6, 2026
29.4%Verified-email coverage
13.7Average contacts per company
1-10Median size (employees)
6.0%Largest-city concentration · Aberdeen
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
104
11-50
60
51-200
23
201-500
2
501-1,000
2

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 200 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with the United Kingdom whose business descriptions match “underwater maintenance services” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking
Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification
Every displayed company carries at least one verified work email. RevenueBase tracks 805 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh
This page's figures were pulled from the company graph on November 6, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “underwater maintenance services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many underwater maintenance services are there based in the United Kingdom?

RevenueBase identified 200 company matches for underwater maintenance services associated with the United Kingdom as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Briggs Marine tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most underwater maintenance services?

Aberdeen leads with 12 company records, followed by London (12) and Southampton (9).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 805 professional contacts with verified work emails tracked across these 200 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 6, 2026.

Ready to reach these companies? Verified emails and direct dials for all 200 underwater maintenance services based in the United Kingdom. Start with a free account, no credit card.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.