Maritime and offshore services of the Golfo San Matías
The RIGI switched on, along the Río Negro coast, something Argentina barely had: permanent, twenty-year demand for marine and offshore services —towing tankers and LNG carriers, mooring at the monobuoys, diving and subsea inspection, spill response, provisioning—. But the big prize already has an owner: the LNG marine contract was awarded in 2026 to Adani-Meridian for ten years, and it was awarded through a global tender. That leg is closed; the crude one is not: we found no permanent operator awarded for tanker-loading support, and the project's own environmental licence states in writing that support with small craft in mooring and unmooring operations is needed. With vessels you come in there, or as a partner inside a larger shipowner's contract; without vessels, through the onshore base services.
The LNG marine core has already been awarded —Adani-Meridian, ten years— and it was awarded through a global tender, not a direct purchase.See the clocks that are running, one by one
On this page
What the market is made of
The market is not one block: it is five service lines with different owners. The largest —LNG marine— is already captive to Adani-Meridian for ten years; the rest is where a Río Negro firm comes in.
~USD 25-40 M/year estim — LNG block contracted to Adani-Meridian for 10 years + one-off foreign installation + probably VLCC towage if it's bundled. Integrated global capital; you don't compete head-on.
~USD 15-30 M/year estim — services to VMOS crude still open + integrity/ROV + OSRO + provisioning/waste/agency + onshore crew + ADERN supplier role. Requires medium capital and certification.
~USD 5-12 M/year thesis — onshore base services and niches (local OSRO, MARPOL waste, crew logistics, subcontracted diving/inspection, being the registered Río Negro partner of the LNG consortium or the national shipowner). Fleet ownership (tugs USD 10-20 M each) is out of reach for an entrant without a capital partner.
Who really pays?
The obvious name is not the client. Maritime money comes in through three different doors — knowing which one is yours is the first step of the sale:
VMOS S.A. operates the monobuoy terminal, and as of 15 September 2026 we found neither a tender nor an award for the permanent crude marine operations package. It is the most open window — and the only award of its own we found in 2026 was for camp services, not the sea.
Southern Energy awarded it to an international consortium —6 vessels, 10 years— after a global competitive tender prob. Here you get in only as a subcontractor or as local crew thesis.
Which projects move this demand
Floating LNG project to export Vaca Muerta gas. Although the plant is in Río Negro, it monetizes Neuquén gas: it is key to the evacuation/monetization thesis for associated gas…
see the project →437-kilometer, 30-inch export pipeline between Allen and Punta Colorada, with a marine terminal of six tanks and two monobuoys some seven kilometers offshore, in the San Matías Gulf…
see the project →The largest project submitted to the RIGI: USD 51,000 million over the whole life of the project…
see the project →When the window opens
This market does not bill until start-up. These are the events that open the window:
See the evidence
See the evidence
[hecho, ya ocurrió] The LNG marine contract —the largest block— belongs to Adani-Meridian for ten years, and it was awarded through a global competitive tender.
See the evidence
thesis If VMOS S.A. awards the maritime O&M of the crude to a global player or to Adani-Meridian itself, Block 2 (the most open, USD 8-22 M) closes before a local can enter.
estim An offshore tug is USD 10-20 M; a ROV campaign requires a vessel+equipment. Without a capital partner, the Río Negro entrant is relegated to onshore services.
estim Maritime O&M is perpetual (2 moored FLNGs + 170-240 calls/year for 2 decades), with no 'end of works'. It's the floor and the appeal of the niche, unlike the construction that closes in 2028.
See the remaining 2 risks
thesis Pre-FID H2-2026. If it takes FID it adds FLNG and traffic → it enlarges the maritime TAM. Do NOT count it as committed; it's an option, not a floor.
estim Billing for permanent services does not start until each asset starts up, and offshore campaigns depend on the Gulf's weather windows. ⚠️ And there is a schedule risk that is not technical.
See the evidence
The opportunity in depth
The opportunity in depth
Crude services: support for tanker loading —support towing, mooring, standby, spill response—, with no permanent operator awarded that we found as of 15 September 2026. It is the most open front, and the environmental licence has already written that support with small craft is needed in mooring and unmooring.
Integrity and diving, and the onshore base —provisioning, waste, water, crew transfers—, replicable by a small firm. The project's diving is provided today by the Norwegian contractor within its installation contract, which ends in late 2026.
Local registered partner or subcontractor inside a larger shipowner's contract. The formal route is written down: a joint venture qualifies as a Río Negro supplier if at least 51 % of its capital or of its decision-making bodies are individuals domiciled in Río Negro — which is, in mirror image, exactly what the global operator did by buying 51 % of an Argentine shipowner.
See the detail
When you get paid, and what blocks it
already in
split
Consortium awarded the LNG marine services contract: 6 vessels —4 high-specification tugs, one anchor-handling vessel and one crew boat—, some USD 70 M of investment, 10 years prob.
See the evidence
Its AHTS has 136 t bollard pull, DP2, FiFi1, and is equipped for spills. ⚠️ Two corrections that matter: its work today is trenching the pipeline and laying anchor blocks on the LNG side, that is installation work and not permanent operation; and it is not the only national shipowner in the gulf —an Argentine-flagged vessel has been working the coastal front since August 2026, and a dredger operates at Punta Colorada—.
See the evidence
Owner of the two floating plants, which it charters to Southern Energy for twenty years verif. It is not the one operating them: the consortium's site says the two vessels «will be operated by Southern Energy» prob, and the same Golar release says Southern Energy is in charge of operating them, with Golar's support verif.
See the evidence
A «substantial» contract, which the company itself defines as USD 25 to 50 M, with two vessels from its fleet, more than 250 days of work across two 2026 campaigns and a scope that includes diving services verif. That it is the Punta Colorada monobuoy contract is stated by the port press: the release does not name the client prob. It is installation work, not permanent operation, and it runs to the fourth quarter of 2026.
See the remaining player
An installation vessel is doing the welding and laying of the subsea pipeline off Punta Colorada verif; that the contractor is the Italian firm is stated by the press and we did not open it unconf. Works, not a recurring market.
The jobs it createsThe effect on employment is strong and specifically Río Negro's. (1) Permanent, skilled marine employment for twenty years: each floating plant employs 160 people on a rotation of 24 days on and 24 off, so with the two units that is ~320 people coming in and out of the area unconf.the detail on jobs and trades
calculate it
The number is our own estimate. The calculation, step by step, is below.
The full calculation, step by step
Concentration High and consolidating. Unlike the Neuquén corridor, where the satellite gap is fragmented and open, here capital and vertical integration closed the maritime core in 2026: the LNG side went to a single consortium for ten years, installation is entirely foreign and one national shipowner has a larger role in the project than the others. The Río Negro entrant arrives late to the big prize; the gap is satellite and onshore.
The rule that moves it
The federal opening agenda reinforces this niche.
See the underlying reading
The underlying policy that opens up this demand. It is the same inference declared by the rules and the program pillars pushing in this direction.
stability → long-term investmentSee the full legal grounds
See the full legal grounds
Where the number comes from
a full regime on the order of 170-240 port calls a year estim, which is what sustains the addressable blocks
See the calculation, the variables and how it was validated
The number is built from the traffic the corridor generates: how many vessels call per year. From there comes the demand for the addressable services.
The price per service —towing, mooring, diving, spill response— is an international benchmark, not a local Gulf tariff, which is not yet published; that is why the whole market apart from the LNG contract is an estimate. And the LNG block is not a formula: it is that contract, annualized.
The number rests on a few variables. The formula shows how it moves when each one changes; and each variable carries its freshness seal — how often it is worth revisiting. estim
The hard anchor of the calculation is the Adani-Meridian contract for LNG marine services —6 vessels, USD 70 M, 10 years—, published by the port press; the international press that reproduced the winner's announcement adds that it was won after a global competitive tender. And there is a figure going around that is not a market: the «USD 685 M» is what Golar collects each year for chartering out its two units, net of operating costs, so it stays out of the calculation. Then we opened the project's environmental licence —a scanned act of state, read page by page— and two things turned up that change the count: the two monobuoys do not load simultaneously, and they can moor Suezmax tankers —which carry half what a supertanker does— as well as large crude carriers; the provincial government reports that the system will be ready for VLCC vessels. ⚠️ If part of the crude leaves on Suezmax, the same volume needs more port calls, so the range of calls we publish is a full-regime figure and not a 2027 number. Prices per service remain international benchmarks: the Gulf's local tariff is not published.
Coverage: the breakdown by category of what the projects bought from Río Negro suppliers in the first quarter of 2026 and the single-point mooring installation contract, whose published scope includes diving services · Sep 15, 2026 · not reviewed: the Registro de Empresas de la Industria Naval of the Prefectura, which is the registry that would settle the question, had its server down on all four attempts, and the provincial suppliers' register does not publish a list of names
How to cite this figure: Despegue (2026). Maritime and offshore services of the Golfo San Matías · Río Negro. despegueargentina.com/en/rio-negro/servicios-maritimos-golfo-san-matias · terms of use
Neighbouring marketsOne market in the same group, from USD 13 to USD 22 M a year
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