SeawaysMPSS · offshore hosts, leased

Applications

What you can put on it

MPSS is a general-purpose low-motion offshore foundation with a 30,000 tonne deck payload envelope. The lessee brings the topsides. This is a running, numbered list of what that deck can carry — and it is deliberately unfinished.

Anchor case

Governs the design, or has a credible first lessee route today.

Near-term

Market pressure exists now; needs a defined topsides partner.

Open

Technically plausible on this hull. Not yet worked up commercially.

A · Energy production and carbon

01

Deepwater production host

Steel catenary risers hung off the ring pontoon, well-bay structures and process modules on deck. The governing motion case for the whole design.

Anchor case
02

Marginal and satellite field redevelopment

Short-life fields that cannot justify a bespoke hull. Lease for the field life, then move the hull. Turns uneconomic reserves into developable ones.

Near-term
03

Gas processing and conditioning platform

Dehydration, sweetening and compression close to the wellhead, exporting conditioned gas to shore or to an LNG facility.

Near-term
04

Floating LNG support and pre-treatment hull

Feed gas pre-treatment and utilities alongside a liquefaction train, decoupling the marine asset from the process contractor.

Open
05

CO₂ injection and carbon storage platform

Compression, injection wellheads and monitoring over depleted reservoirs or saline aquifers. Typically a joint venture with no in-house hull expertise — leasing simplifies the structure.

Near-term
06

Offshore hydrogen and ammonia production

Electrolysis powered by co-located wind or gas, with synthesis and export handling on deck. Keeps the hazard envelope offshore and away from populated coastline.

Open

B · Power and grid

07

Floating HVDC converter station

Converter halls, transformers and switchgear for offshore wind beyond practical AC cable distance. Topsides on current units already reach 18,000–20,000 tonnes — inside the MPSS payload envelope.

Anchor case
08

Offshore AC substation and collector hub

Array collection, transformation and export for a wind farm cluster, delivered as a moored hull rather than a bespoke jacket build.

Near-term
09

Floating wind hub

A turbine mounted on a corner column, with dispatchable generation and storage on the same deck. One platform that produces and firms its own output.

Near-term
10

Grid-scale battery storage island

Containerised storage offshore, close to the generation and clear of land constraints and fire-separation planning objections.

Open
11

Powership under long-term PPA

Gas turbines and conditioning supplying a coastal grid where onshore generation cannot be permitted or built in time.

Open
12

Interconnector mid-point relay platform

Repeater and converter capacity at the midpoint of a long submarine interconnector, where no seabed structure is practical.

Open

C · Digital infrastructure and compute

13

Offshore AI training data centre

Direct seawater cooling as an effectively unlimited free heat sink, zero freshwater consumption, self-contained microgrid, no grid connection queue, no land permitting. AI training is not latency-sensitive.

Anchor case
14

Edge inference platform

Sited off a coastal metro with fibre to shore where inference latency requires proximity but land and power do not exist.

Near-term
15

Subsea cable landing and switching hub

Branching units, powering and switching offshore, avoiding congested and politically sensitive shore landing points.

Open
16

Sovereign data haven

Data residency under a chosen flag, physically isolated, relocatable if the regulatory or security position changes.

Open
17

Stranded-energy compute

Compute co-located with otherwise flared or curtailed energy, monetising power that has no route to a grid.

Open
18

Satellite teleport and ground station

A stable, low-motion deck for large antennas in an equatorial or high-latitude position with no available land.

Open

D · Water, food and coastal resilience

19

Seawater reverse osmosis desalination platform

SWRO trains plus self-generated power, piping freshwater to shore under a long-term government offtake. A sovereign infrastructure contract, financeable against the lease.

Anchor case
20

Brine management and mineral recovery

Offshore brine dispersal to open water plus lithium, magnesium and salt recovery — turning the desalination waste stream into a second product.

Open
21

Aquaculture service and processing hub

A stable working platform for offshore pen systems: feed storage, husbandry, harvest handling and crew accommodation.

Open
22

Floating cold storage and processing

Freezing, cold chain and export handling positioned on the fishing ground rather than at a congested port.

Open
23

Emergency water and power for coastal cities

A relocatable unit that supplies water and electricity to a city following drought, storm damage or grid failure.

Open

E · Defence and sovereign capability

24

Military sea base and forward logistics platform

Persistent presence without a host-nation land agreement. Fuel, stores, workshops, aviation and boat handling on a stable deck.

Near-term
25

Secure isolated compute and communications

Sovereign offshore compute with physical isolation from land networks, relocatable in a crisis. Not dependent on any land-based grid or territory.

Near-term
26

Maritime domain awareness platform

Long-endurance radar, passive sensing and unmanned vehicle operations covering an exclusive economic zone.

Open
27

Disaster relief and field hospital platform

Self-powered medical, water and accommodation capacity that arrives when the port and the road network no longer work.

Open
28

Border and EEZ enforcement base

Forward basing for patrol craft and aircraft in waters with no usable island or port.

Open

F · Marine industry and logistics

29

Module integration and heavy-lift base

Offshore assembly and commissioning of large modules, relieving quayside congestion at the yard.

Open
30

Floating dry dock and repair yard

Ballastable hull with deck workshops, positioned where repair demand exists but yard capacity does not.

Open
31

Decommissioning and module receiving platform

Receiving, cutting and sorting removed topsides offshore, reducing heavy-lift vessel days and onshore handling.

Open
32

Transhipment and container relay hub

Ship-to-ship transfer offshore where the port is draft-limited, congested or politically constrained.

Open
33

Alternative-fuel bunkering hub

Methanol and ammonia bunkering on a stable platform, keeping high-hazard storage away from port populations.

Open
34

Wind farm operations and accommodation base

Permanent O&M base inside a large offshore wind array, replacing daily crew transfer from shore.

Near-term

G · Science and frontier

35

Ocean research station

A stable, instrument-grade deck for long-duration oceanographic, atmospheric and climate measurement.

Open
36

Deep-sea minerals handling platform

Riser handling, dewatering and transhipment for seabed minerals recovery, with the sensitive process kept offshore.

Open
37

Launch and recovery platform

Low motion, large flat deck, no population beneath the flight path, and the ability to move to the optimum latitude.

Open
38

Wave, tidal and floating solar test bed

A qualified low-motion host for marine energy prototypes that currently have nowhere stable to be tested at scale.

Open
39

Offshore hospitality and expedition base

Remote-location accommodation with a genuinely stable deck — a different proposition from a vessel at anchor.

Open
40

Heat recovery and industrial symbiosis

Waste heat from offshore compute or generation reused for desalination, aquaculture or process heat on the same deck.

Open

Numbering is a stable reference for discussion. Items are technical and commercial candidates, not committed products, and none of them implies an existing customer or contract.

Open call

Number 41 has not been written yet

If you can see a use for a 30,000 tonne, low-motion, relocatable offshore deck that is not on this list, send it. Good ideas get added to the numbered list and credited if you want the credit.

Be specific. The useful part is the customer and the pain, not the concept.

Every submission is held for approval and reviewed by Seaways before anything appears on this page. Do not send confidential or commercially sensitive material through this form — use the contact page and we will put an NDA in place first.

One hull. Forty markets. One anchor lessee needed.

The commercial task is not finding applications. It is converting one of them into a signed take-or-pay lease.