Company lists · Data refreshed September 2026

Top 25 Marine surveillance companies worldwide

Name: Marine surveillance companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 3,894 companies tracked

RevenueBase identified 3,894 marine surveillance companies worldwide as of September 2026 and tracks 76,666 professional contacts across them, including 16,044 with verified work emails. The United States is the largest market and Singapore the largest hub.

This list covers marine surveillance companies worldwide, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 20, 2026. Country and city lists for marine surveillance companies follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 20, 2026 86% judged on-target in blind review

3,894Companies

76,666Contacts tracked

16,044Verified emails

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The 25 largest marine surveillance companies worldwide

Ranked by team size

Top 25 of 3,894 marine surveillance companies worldwide, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to marine surveillance companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Free Lancer	Indirect evidence	BrazilHQ checked Sep 20, 2026	n/a	2,224 contacts →
	Indirect evidence “Rov company.” Source: RevenueBase Database · checked Sep 20, 2026
2	Grupo CBO	Indirect evidence	Niterói, BrazilHQ checked Sep 20, 2026	1,001-5,000	1,847 contacts →
	Indirect evidence “O Grupo CBO é uma das maiores empresas de apoio marítimo do Brasil.” Source: RevenueBase Database · checked Sep 20, 2026
3	Maersk Supply Service	Indirect evidence	Rio De Janeiro, BrazilHQ checked Sep 20, 2026	201-500	1,407 contacts →
	Indirect evidence “With more than 50 years of legacy, Maersk Supply Service celebrates a new important milestone: from November 1st, our headquarters are officially located in Brazil.” Source: RevenueBase Database · checked Sep 20, 2026
4	Shearwater Geoservices	Partial evidence	Laksevåg, NorwayHQ checked Sep 20, 2026	1,001-5,000	1,031 contacts →
	Partial evidence “Shearwater is a global marine geoscience and technology business.” Source: RevenueBase Database · checked Sep 20, 2026
5	Wintermar Offshore Marine TBK	Partial evidence	Kebayoran Lama, IndonesiaHQ checked Sep 20, 2026	501-1,000	972 contacts →
	Partial evidence “As a one-stop offshore marine services company, Wintermar Offshore Marine Group strives to support all types of offshore operations, offering innovative vessel and logistical…” Source: RevenueBase Database · checked Sep 20, 2026
6	Topaz Energy And Marine	Partial evidence	Dubai, United Arab EmiratesHQ checked Sep 20, 2026	5,001-10,000	943 contacts →
	Partial evidence “P&O Maritime Logistics is a leading provider of marine solutions with focus on offshore energy, port services and logistics.” Source: RevenueBase Database · checked Sep 20, 2026
7	Micoperi SRL	Partial evidence	Ravenna, ItalyHQ checked Sep 20, 2026	201-500	841 contacts →
	Partial evidence “MICOPERI has been active in the marine sector since 1946 when the company was incorporated as a salvage company to free the shipping routes from vessels sunk during the Second…” Source: RevenueBase Database · checked Sep 20, 2026
8	Swire Pacific Offshore	Partial evidence	SingaporeHQ checked Sep 20, 2026	1,001-5,000	805 contacts →
	Partial evidence “Established since 1975, Swire Pacific Offshore (SPO) was a trusted marine services provider that pride itself on delivering safe, high quality, reliable and sustainable Marine…” Source: RevenueBase Database · checked Sep 20, 2026
9	Allianz Middle East Ship Management LLC	Partial evidence	Abu Dhabi, United Arab EmiratesHQ checked Sep 20, 2026	1,001-5,000	793 contacts →
	Partial evidence “With offices in Abu Dhabi, Dubai, Qatar and Singapore, Allianz Middle East Ship Management LLC(Allianz-ME) is a well-established marine contractors providing modern Offshore…” Source: RevenueBase Database · checked Sep 20, 2026
10	Stanford Marine	Indirect evidence	Dubai, United Arab EmiratesHQ checked Sep 20, 2026	n/a	715 contacts →
	Indirect evidence “Established in 1997, we operate an extensive fleet of Offshore Supply Vessels that service the Oil and Gas industry in the Middle East, South East Asia, Africa, India and the Gulf…” Source: RevenueBase Database · checked Sep 20, 2026
11	CLS Group Collecte Localisation Satellites	Partial evidence	Ramonville Saint Agne, ItalyHQ checked Sep 20, 2026	1,001-5,000	575 contacts →
	Partial evidence “CLS is a global company and pioneer provider of monitoring and surveillance solutions for the Earth, created in 1986.” Source: RevenueBase Database · checked Sep 20, 2026
12	Gardline Limited	Partial evidence	Great Yarmouth, United KingdomHQ checked Sep 20, 2026	501-1,000	545 contacts →
	Partial evidence “Gardline is a best-in-class provider of geophysical, geotechnical and environmental marine surveys.” Source: RevenueBase Database · checked Sep 20, 2026
13	Baru Offshore	Indirect evidence	Rio De Janeiro, BrazilHQ checked Sep 20, 2026	501-1,000	514 contacts →
	Indirect evidence “Empresa Brasileira de Navegação.” Source: RevenueBase Database · checked Sep 20, 2026
14	Island Offshore	Indirect evidence	Ulsteinvik, NorwayHQ checked Sep 20, 2026	501-1,000	501 contacts →
	Indirect evidence “Island Offshore - The Island Offshore Group is a leading provider of services to the offshore industry ranging from Platform Supply, Walk-to-work and Anchor Handling to Advanced…” Source: RevenueBase Database · checked Sep 20, 2026
15	asso.subsea	Partial evidence	Elefsina, GreeceHQ checked Sep 20, 2026	501-1,000	478 contacts →
	Partial evidence “ASSO group is a technology driven company specialized to provide services and sub-sea equipment for underwater works in the marine and offshore field.” Source: RevenueBase Database · checked Sep 20, 2026
16	Global Maritime	Partial evidence	Stavanger, NorwayHQ checked Sep 20, 2026	201-500	472 contacts →
	Partial evidence “Global Maritime delivers integrated marine solutions for a changing offshore world.” Source: RevenueBase Database · checked Sep 20, 2026
17	Reach Subsea	Indirect evidence	Haugesund, NorwayHQ checked Sep 20, 2026	201-500	454 contacts →
	Indirect evidence “Reach Subsea ASA (“Reach Subsea”, “Reach” or “the Group”) is a prominent offshore contractor that offer high quality solutions and technology to clients in need of ocean data and…” Source: RevenueBase Database · checked Sep 20, 2026
18	Ambrey	Partial evidence	Hereford, United KingdomHQ checked Sep 20, 2026	51-200	435 contacts →
	Partial evidence “Always On"- We are at the heart of a diverse and interdependent global maritime eco-system.” Source: RevenueBase Database · checked Sep 20, 2026
19	Hydrodive Group	Partial evidence	Lagos, NigeriaHQ checked Sep 20, 2026	201-500	409 contacts →
	Partial evidence “HydroDive provides a broad range of Marine Vessels, Air, Mixed Gas and Saturation Diving, ROV, AUV and Survey Services primarily to the offshore & inshore Petroleum Industry of…” Source: RevenueBase Database · checked Sep 20, 2026
20	Master Systems	Partial evidence	Dubai, United Arab EmiratesHQ checked Sep 20, 2026	201-500	408 contacts →
	Partial evidence “A maritime enterprise with expertise in a variety of services and a dedication to delivering forward-thinking solutions for the industry.” Source: RevenueBase Database · checked Sep 20, 2026
21	Mermaid Subsea Services CO LTD Saudi Arabia	Indirect evidence	Dammam, Saudi ArabiaHQ checked Sep 20, 2026	501-1,000	404 contacts →
	Indirect evidence “This page is dedicated to Mermaid Subsea Saudi Arabia.” Source: RevenueBase Database · checked Sep 20, 2026
22	James Fisher And Sons PLC	Indirect evidence	Barrow-in-furness, United KingdomHQ checked Sep 20, 2026	1,001-5,000	403 contacts →
	Indirect evidence “Above, below and beyond the world’s oceans.” Source: RevenueBase Database · checked Sep 20, 2026
23	Coastal Marine Construction & Engineering LTD	Partial evidence	Mira Bhayander, IndiaHQ checked Sep 20, 2026	201-500	403 contacts →
	Partial evidence “COMACOE - Coastal Marine Construction & Engineering Ltd is an experienced marine services contractor with operations in multiple geographies offering a range of service over the…” Source: RevenueBase Database · checked Sep 20, 2026
24	Briggs Marine	Partial evidence	Burntisland, United KingdomHQ checked Sep 20, 2026	501-1,000	387 contacts →
	Partial evidence “Briggs Marine is a leading provider of marine and environmental services, specialising in port and marine operations, subsea and environmental support and vessel charter.” Source: RevenueBase Database · checked Sep 20, 2026
25	Horizon Geosciences	Partial evidence	Sharjah, United Arab EmiratesHQ checked Sep 20, 2026	201-500	381 contacts →
	Partial evidence “Headquartered in the UAE, Horizon Geosciences provide marine survey and geotechnical services to an array of clients around the world.” Source: RevenueBase Database · checked Sep 20, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: marine surveillance companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names marine surveillance companies.
Partial evidence: Its own public description names part of marine surveillance companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name marine surveillance companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 3,894 marine surveillance companies worldwide

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Marine surveillance companies worldwide at a glance

As of Sep 20, 2026

20.9%Verified-email coverage

19.7Average contacts per company

11-50Median size (employees)

2.1%Largest-city concentration · Singapore

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

1,826

11-50

1,334

51-200

491

201-500

130

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among marine surveillance companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
Coverage: Every country. Country and city lists for marine surveillance companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “marine surveillance companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names marine surveillance companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among marine surveillance companies, and records with no verified work email.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 16,044 across the full list. 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 September 20, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Marine surveillance companies by location

25 lists · largest first

Every Marine surveillance companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names marine surveillance companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many marine surveillance companies are there worldwide?

RevenueBase identified 3,894 marine surveillance companies worldwide as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Free Lancer, headquartered in Worldwide, tops this list with the largest team on record.

Which country has the most marine surveillance companies?

The United States leads with 531 companies, followed by the United Kingdom (353) and India (171). Every marine surveillance companies list by country and city is linked on this page.

Which city has the most marine surveillance companies?

Singapore leads with 82 headquartered companies, followed by Dubai (48) and London (44).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 16,044 verified decision-maker contacts tracked across these 3,894 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 20, 2026.

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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 Smart Search, 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.