How we deliver on service commitments.
An Aquatic Prosperity program is a zone with an agreed edge, indicators written for the water inside it, the hulls that ground will take, a treatment stage, and instruments read by an institution that does not work for us. We keep improving all five, so a commitment made at signature still holds years later. Everything sits on our side of the line. Turnkey.
The parts
Five things get assembled, and the boat is one of them.
The vessel is the visible part. Whether the water holds depends on the four things around it.
- A boundary An area of water with an edge, agreed in writing. Inside it we answer for the condition against the agreed indicators; outside it we do not. A hull's reach has nothing to do with where the line was drawn. Deep Strikes still run outside it, on water heading your way and on bloom features far enough out to be adjacent to nothing.
- Ongoing subscription Service runs continuously, delivered by a licensed service operator. Effort shifts with the water (bloom season on one coast, the stratified months on another, the fortnight either side of a marine heatwave on a reef), and those windows steer the tasking without bounding the engagement. A minimum subscription period sits underneath: the contracted outcomes are demonstrated through the calibration phase, then held by the service that follows. The work stays preventive, the cheaper end of this business.
- A fleet to suit Three specified tiers, Nimble, Standard and Mega, none of them in the water yet, and physics rather than budget settles which can work a given stretch. Draft over the thinnest ground decides it most often: a reef flat or a sill at a lagoon mouth ends the case for a larger vessel on its own. Distance from a berth decides how much of a day is treating and how much steaming. A zone holding both shallow reef and a dredged port basin wants more than one hull, and the service deploys whatever vessel systems the job needs. More on SeaBreather vessels.
- A treatment stage An intake, a closed reactor and an outlet. Water is taken in, treated on its way through, and returned oxygen-enriched to the layer that lost it, at concentrations your consent fixes and the outlet is sampled against. The oxidation duty runs under independent scientific oversight that reads the outlet data as it lands. It is one duty among several: other treatment capabilities sit behind it, deployed as the water requires under the same oversight. More on the chemistry and discharge controls.
- Instruments, and a second party reading them Telemetry, profiles and imagery, with standing access to all of it for the institution that already answers for that water. Controls and data.
The technical detail
The naval architect, the chemist and the data team.
Three desks that ask different questions and rarely accept each other's answers.
SeaBreather vessels
The hull, the three tiers, what is bolted to the deck, and the constraints that settle which vessel can work which ground.
The treatment stage
Gas preparation, the contained reactor, the mass-transfer band a gas budget is sized from, and the discharge standard the effluent has to meet at the outlet.
Controls and data
How a dose gets decided on the day, what stops a pass, how hulls are routed, and what leaves the program as a record.
The boundary
Bathymetry draws the zone before the budget does.
Shallow ground dictates which hull can work a zone; distance from a berth dictates how much of the day goes on steaming; the prevailing wind dictates where tomorrow's problem arrives from.
Each zone is baselined against its own oceanography before it is written into anything (what the water does through the year, what already lives in it, which months carry the exposure) and its indicators come out of that record, so two adjacent zones can end up on different limits. One example: a cool-temperate inverse estuary in South Australia, where no hull works yet, characterized because its physics contradicts the Gulf's at nearly every point. That tests whether a method travels or merely describes one warm sea.
What pulls a boundary in
Ground too thin for the tier available. A far corner a single hull reaches late, until the zone earns more capacity. Water somebody else already has an obligation over. A stretch whose tidal exchange would take more hulls to hold than the benefit is worth.
What pushes it out
An intake approach just outside the obvious perimeter. A nursery ground that feeds the fishery inside it. The next bay upwind, where the bloom you will be treating in a fortnight is forming now.
The calendar
The window is where the damage shows. It is not where it was decided.
Coastal damage arrives in a window, and everybody plans around the window. That is the mistake.
In 2025 the Chesapeake ran 60 sustained days of hypoxia, against a long-term span of 78 to 116 days. Its daily maximum hypoxic volume reached 10.1 cubic kilometers, close to the median of 10.7. The season is bounded; the loading that fills it is not. Nutrients arrive on every month's rainfall, warmth builds through the spring, and the organic debt one summer leaves is where the next one opens.
So the subscription runs the whole way round. A quiet February is the month in which July is settled, and it is cheap to work compared with anything done under an advisory. What the hulls do that week follows the water.
The people
A program is a crew list before it is a technology.
Five roles, and the fifth one does not work for us.
On the hull: a master and deck crew qualified for that flag and that water. A treatment operator who runs the gas plant and the reactor and answers for the effluent meeting its standard at the outlet. A water-quality technician who reads the column at depth before and after the pass, because a surface reading either side of a treatment proves very little.
Ashore: an analyst who decides where hulls go tomorrow from telemetry, imagery and forecast risk, a day ahead of the water.
Outside: the local scientific institution engaged for the duration, holding the same live feeds the duty crew reads and free to bring instruments of its own. That role is written into the program, with its own name against the record it keeps.
Consumables
Gas is inside the subscription because gas logistics is where these programs fail.
Neither gas is exotic. Oxygen is an ordinary industrial commodity, and the ozone is made from it aboard as the pass calls for it. The hard problem is getting industrial volumes of oxygen to the hull, week after week for years, on a coastline where the nearest plant may be several hundred kilometers away. That decides whether the fleet works or waits.
At asset scale a vessel replenishes from shore. At national scale that runs out, so supply is engineered in at the design stage, with an industrial gas partner holding regional capacity as part of how the program is built. Past that threshold the fleet is composed against the zone in the site read, tier by tier.
Either way it sits on our side of the boundary. You are not running a gas contract.
A program that size can sit in more than one commercial structure: Alarivean delivering the service directly, a joint venture, or a license from Sophia Delta with or without one alongside, depending on the jurisdiction and what the client already holds.
Scope
Where the boundary of the contract sits.
Four items that stay outside it, written into the scope at signature.
- It does not rewrite land use. Cutting what leaves a catchment is policy work, and it should be under way. A firewall set at the runoff hotspots holds the loading dynamic in check while that gets legislated and funded.
- It does not transfer your permitting relationship. The consent under which work happens in your water is yours, and we are the contractor named inside it.
- It does not sell you equipment. The systems are operated, never sold, leased or transferred, and the license they run under stays with Sophia Delta.
- It does not cool a whole sea, and nothing in a fleet turns a regional thermal signal around. Breaking a stratified cap is a local instrument and is sold as one: where heat arrives as a regional signal, working a single basin buys nothing, and the site read says so before the contract does. Shade is the second instrument, a dense cloud of bubbles between the sun and the water below, each sending a little of the day's load back. It is relief from the exposure, never an end to the event, and its extent depends on how many hulls the zone can carry and what the relief is worth.
Across the group
Asked before the technical questions start
Three about the shape of the thing
Can we buy a SeaBreather instead of a program?
No. The systems are licensed from our parent company, Sophia Delta, and stay with us, along with the crew, the permits and the liability. They are not for sale or hire.
What is purchasable is a subscription: the condition of a defined area of water, agreed before deployment and held there by a licensed service operator. If your board needs an asset on the balance sheet, this is the wrong instrument, and the site read will say so before a proposal is drafted.
Who is actually on the boat?
A master and deck crew, a treatment operator and a water-quality technician. Ashore, an analyst tasks tomorrow's hulls; the oversight scientists answer to their own institution and see the readings when the duty crew does.
Does a program have to run all year?
Yes. Year-round work is how the result is produced.
Rain delivers nutrients in the quiet months, spring warming does the stratifying, and whatever was left rotting last autumn is where this year's oxygen budget starts. A subscription worked through all of that meets a smaller problem in July than one switched on in June. The alternative is emergency treatment, sought when your position is weakest.
Where the line would go
Tell us the water and we will tell you the shape.
The zone, the months it has to be hardest in, the tier and what sits outside the boundary all come back in the site read. To start, describe what goes wrong and when.