Company lists · Data refreshed September 2026

Top 25 Coastal survey firms worldwide

Name: Coastal survey firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 2,261 companies tracked

RevenueBase identified 2,261 coastal survey firms worldwide as of September 2026 and tracks 31,535 professional contacts across them, including 8,415 with verified work emails. The United States is the largest market and Rio De Janeiro the largest hub.

This list covers coastal survey firms 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 19, 2026. Country and city lists for coastal survey firms 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 19, 2026 86% judged on-target in blind review

2,261Companies

31,535Contacts tracked

8,415Verified emails

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The 25 largest coastal survey firms worldwide

Ranked by team size

Top 25 of 2,261 coastal survey firms worldwide, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to coastal survey firms: 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	Shearwater Geoservices	Indirect evidence	Laksevåg, NorwayHQ checked Sep 19, 2026	1,001-5,000	1,031 contacts →
	Indirect evidence “Shearwater is a global marine geoscience and technology business.” Source: RevenueBase Database · checked Sep 19, 2026
2	Pt. Anindya Wiraputra Konsult	Partial evidence	Jakarta, IndonesiaHQ checked Sep 19, 2026	1,001-5,000	623 contacts →
	Partial evidence “ANINDYA is an independent surveying company that provides quality and quantity superintending service for the coal and minerals industry, the oil and gas sector as well as marine…” Source: RevenueBase Database · checked Sep 19, 2026
3	Gardline Limited	Partial evidence	Great Yarmouth, United KingdomHQ checked Sep 19, 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 19, 2026
4	Saexploration	Indirect evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	201-500	521 contacts →
	Indirect evidence “SAExploration offers a full range of geophysical ground acquisition services from design, prospecting, drilling, recording and analysis of field quality, as well as mobilization…” Source: RevenueBase Database · checked Sep 19, 2026
5	ARGAS	Indirect evidence	4204 King Fahd Road, Saudi ArabiaHQ checked Sep 19, 2026	1,001-5,000	512 contacts →
	Indirect evidence “ARGAS, since its inception in 1966, was focused on developing Geological and Geophysical field solutions to further explore the earth’s Natural Resources.” Source: RevenueBase Database · checked Sep 19, 2026
6	UK Hydrographic Office	Indirect evidence	Taunton, United KingdomHQ checked Sep 19, 2026	501-1,000	502 contacts →
	Indirect evidence “The UK Hydrographic Office (UKHO) is a world-leading centre for hydrography, delivering data and expertise for safe, secure and thriving oceans.” Source: RevenueBase Database · checked Sep 19, 2026
7	UTEC	Indirect evidence	Aberdeen, United KingdomHQ checked Sep 19, 2026	201-500	490 contacts →
	Indirect evidence “UTEC, Acteon’s Geo-services business line, harnesses data to optimise designs, save time and maximise your project’s economic value by providing a holistic understanding of the…” Source: RevenueBase Database · checked Sep 19, 2026
8	Anchor QEA	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 19, 2026	501-1,000	479 contacts →
	Indirect evidence “Headquartered in Seattle, Washington, Anchor QEA is a nationally recognized environmental science and engineering consulting firm specializing in aquatic, shoreline, and water…” Source: RevenueBase Database · checked Sep 19, 2026
9	Reach Subsea	Indirect evidence	Haugesund, NorwayHQ checked Sep 19, 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 19, 2026
10	Geoquip Marine	Indirect evidence	9001 St. Gallen, SwitzerlandHQ checked Sep 19, 2026	201-500	422 contacts →
	Indirect evidence “Geoquip Marine is a geotechnical data acquisition company safely delivering offshore geotechnical site investigations and engineering services to clients worldwide.” Source: RevenueBase Database · checked Sep 19, 2026
11	Coastal Marine Construction & Engineering LTD	Partial evidence	Mira Bhayander, IndiaHQ checked Sep 19, 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 19, 2026
12	SHOM	Indirect evidence	Toulouse, FranceHQ checked Sep 19, 2026	501-1,000	402 contacts →
	Indirect evidence “Le Shom produit l'information géographique maritime et littorale de référence- https://data.shom.fr - https://diffusion.shom.fr Héritier du premier service hydrographique officiel…” Source: RevenueBase Database · checked Sep 19, 2026
13	Briggs Marine	Indirect evidence	Burntisland, United KingdomHQ checked Sep 19, 2026	501-1,000	387 contacts →
	Indirect 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 19, 2026
14	Horizon Geosciences	Partial evidence	Sharjah, United Arab EmiratesHQ checked Sep 19, 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 19, 2026
15	Geoxyz	Partial evidence	Zwevegem, BelgiumHQ checked Sep 19, 2026	501-1,000	374 contacts →
	Partial evidence “GEOxyz is an international maritime data company specialized in hydrographic, geophysical, geotechnical and topographical surveys, site investigations, renewable energy support…” Source: RevenueBase Database · checked Sep 19, 2026
16	Java Offshore	Indirect evidence	Jakarta, IndonesiaHQ checked Sep 19, 2026	51-200	339 contacts →
	Indirect evidence “Java Offshore, established in 2010, is a leading independent Offshore Services Contractor providing a range of Geophysical, Geotechnical and Subsea related solutions to marine…” Source: RevenueBase Database · checked Sep 19, 2026
17	PXGEO	Indirect evidence	United StatesHQ checked Sep 19, 2026	201-500	313 contacts →
	Indirect evidence “We are a subsea solutions company built on decades of experience across every major basin.” Source: RevenueBase Database · checked Sep 19, 2026
18	Global Ship Port Service	Indirect evidence	Salvador, BrazilHQ checked Sep 19, 2026	501-1,000	268 contacts →
	Indirect evidence “Somos a Global Ship, uma empresa líder em operações marítimas e portuárias.” Source: RevenueBase Database · checked Sep 19, 2026
19	Safeen Subsea	Partial evidence	Abu Dhabi, United Arab EmiratesHQ checked Sep 19, 2026	201-500	267 contacts →
	Partial evidence “SAFEEN Survey & Subsea Services is a premier provider of integrated offshore survey, diving and subsea engineering solutions across the UAE, GCC and globally.” Source: RevenueBase Database · checked Sep 19, 2026
20	Sulmara	Indirect evidence	Glasgow, United KingdomHQ checked Sep 19, 2026	201-500	241 contacts →
	Indirect evidence “Sulmara is a global seabed intelligence company, capturing and interpreting high-quality subsea data to enable smarter offshore decisions.” Source: RevenueBase Database · checked Sep 19, 2026
21	J.F. Brennan Company	Indirect evidence	La Crosse, WI, United StatesHQ checked Sep 19, 2026	501-1,000	241 contacts →
	Indirect evidence “At Brennan, our people are our top priority.” Source: RevenueBase Database · checked Sep 19, 2026
22	Geocean	Indirect evidence	Cassis, FranceHQ checked Sep 19, 2026	n/a	216 contacts →
	Indirect evidence “GEOCEAN is a marine work contractor, based near Marseille, in the south of France, with 30 years experience worldwide.” Source: RevenueBase Database · checked Sep 19, 2026
23	Topocart Topografia, Engenharia E Aerolevantamentos	Indirect evidence	Brasília, BrazilHQ checked Sep 19, 2026	201-500	215 contacts →
	Indirect evidence “A Topocart é uma empresa de consultoria especializada na área de aerolevantamento, geoprocessamento, cartografia, sistemas de informação geográfica, cadastro técnico…” Source: RevenueBase Database · checked Sep 19, 2026
24	MMT	Indirect evidence	Västra Frölunda, SwedenHQ checked Sep 19, 2026	201-500	213 contacts →
	Indirect evidence “We collect and process information to visualise the conditions of the seabed.” Source: RevenueBase Database · checked Sep 19, 2026
25	Seabird Exploration	Indirect evidence	Bergen, NorwayHQ checked Sep 19, 2026	501-1,000	194 contacts →
	Indirect evidence “SeaBird Exploration is a wholly owned subsidiary of SED Energy Holdings Plc, which is listed on Euronext Oslo Børs.” Source: RevenueBase Database · checked Sep 19, 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: coastal survey firms. 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 coastal survey firms.
Partial evidence: Its own public description names part of coastal survey firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name coastal survey firms. 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 2,261 coastal survey firms worldwide

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Coastal survey firms worldwide at a glance

As of Sep 19, 2026

26.7%Verified-email coverage

13.9Average contacts per company

1-10Median size (employees)

1.1%Largest-city concentration · Rio De Janeiro

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

1,264

11-50

701

51-200

211

201-500

501-1,000

1,001-5,000

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 coastal survey firms, 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 coastal survey firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “coastal survey firms”. 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 coastal survey firms), 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 coastal survey firms, 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, 8,415 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 19, 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.

Coastal survey firms by location

14 lists · largest first

Every Coastal survey firms 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 coastal survey firms, 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 coastal survey firms are there worldwide?

RevenueBase identified 2,261 coastal survey firms 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?

Shearwater Geoservices, headquartered in Laksevag, tops this list with the largest team on record.

Which country has the most coastal survey firms?

The United States leads with 569 companies, followed by the United Kingdom (175) and Brazil (90). Every coastal survey firms list by country and city is linked on this page.

Which city has the most coastal survey firms?

Rio De Janeiro leads with 26 headquartered companies, followed by Houston (20) and Istanbul (20).

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 8,415 verified decision-maker contacts tracked across these 2,261 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 19, 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.