ENSURING COASTLINES AGAINST SARGASSUM THREATS.
SEA SWEEPER
​Sea Sweeper is a Sagus-sponsored coastal resilience infrastructure platform designed to prevent the impacts of pelagic sargassum before it reaches shore. Through offshore interception and early intervention, Sea Sweeper protects ecosystems, economies, and communities while reducing the long-term costs of reactive cleanup.
Designed for regional and sovereign deployment, Sea Sweeper operates through dedicated joint ventures under Sagus governance, enabling scalable, prevention-first protection for coastlines worldwide.
This is not a cleanup project: it’s coastal insurance at national scale…
A Sagus Holdings Project
Sister company: Ocean Blade
PROBLEM
PROBLEM ENVIRONMENTAL CATASTROPHE
Puerto Rico's Atlantic and southeastern coasts suffer severe yearly sargassum inundation, causing state of emergency:
Tourism losses:
Hotel Closures, Reduced Occupancy, Reputational Damage
Public Sector Costs:
Beach Cleanup, Equipment, Emergency Responses
Environmental Degradation
Reef Smothering, Fish Kills, Hâ‚‚S Emissions
Infrastructure Disruption:
Hotel Closures, Reduced Occupancy, Reputational Damage
Annual economic impact: $600M per year for Puerto Rico; regionally estimated at $2–5B per year.
SOLUTION
OFFSHORE SARGASSUM INTERCEPTION NETWORK
Deploy the world's first Offshore Sargassum Interception Network, combining:
Satellites
Sargassum Tracking + Route Modelling
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Crewed Offshore Vessel
Shuttles Biomass To Shore + Pre-wash
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Active Monitoring Buoys
Positioned Offshore In Convergence Zones, Interconnected With Sea Booms.
Data + Predictive Analytics
Supports real-time interception
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20m Industrial Drone Vessels
Boom Deployment + Tethered Drones For High-angle Visibility.
Process collected Sargassum
Re-use as construction materials for smart cities / bio fuels
STOPS SARGASSUM BEFORE IT REACHES THE COAST, ELIMINATING MOST DOWNSTREAM ECONOMIC LOSS. ✷
HOW IT WORKS
Sea Sweeper deploys an offshore interception network designed to identify, intercept, and manage sargassum blooms before they reach vulnerable coastlines. Intercepted biomass is contained and handled in controlled conditions, minimizing ecological damage and downstream cleanup costs.
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Downstream handling pathways vary by region and partnership structure and are selected to align with environmental safeguards and local infrastructure.
Step
01
Satellite & Modelling
Identify the Sargassum mats floating and predict likely path, combined with historic trends
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Step
04
Active Gathering
Drone vessels tow further booms connected to buoys in the network and hold station or track mats of sargassum to maximise capture.
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Step
02
Deploy Smart Buoys
A network of buoys positioned to interact with the main weed lines and drift (Nearshore 60m depth).
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Step
05
Collection
Sargassum is captured at the base of the triangular 'trap' and driven into a box trawl net, loaded onto support ship.
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Step
03
Deflection or Interception
Optionally crewed drone vessels deploy sea booms between the buoy network or the support vessel creating conical traps or barriers.
Step
06
Sargassum Transported Then Utilised
Sargassum washed and separated is transported to shore for use as construction material additive or bio fuel
TECHNOLOGY
TRIFECTA OF TECHNOLOGY
Autonomous Surface Vessels + Multi-Modal Ocean Sensors
Optionally crewed platforms with advanced payloads now enable persistent, low cost, high frequency access to the ocean without traditional diver / ship / human operational limits.
High resolution satellite imagery and Al interpretation
We can track, interpret and extrapolate trends in met ocean information to actively intercept currents and flows that bring the bulk of Sargassum ashore.
Al Informed Interception
Pre-positioned network of buoys positioned to allow Sargassum to drift into capture booms for onshore processing.
A $5B problem, a $1.5B regional wedge, and a $200M starting beachhead—beginning with Dominican Republic and Puerto Rico.
TAM
$5B
Represents the global spend associated with sargassum damage, cleanup, coastal protection, and lost tourism across the Caribbean, Gulf of Mexico, West Africa, and Brazil.
SAM
$1.5B
Represents the money already being spent (or budgeted) for sargassum clean-up, mitigation, and tourism protection.
SOM
$200M
​Based on Puerto Rico's estimated annual economic exposure from sargassum (tourism losses, clean-up costs, H2S health impacts).
Any financial projections presented are illustrative only and dependent on partner agreements, regulatory approvals, deployment scale, and capital structure. Detailed financial models are developed and shared with qualified partners during diligence.
ALTERNATIVES
WHY OTHERS FAIL
Collect on Shoreline
01
Reactive collection, leads to major cleanup operations.
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Economic impacts the unusable beaches and cleanup costs
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Destruction of beach habitats during collection
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Country wide economic impact every year and increasing
Do Nothing
03
Sargassum decomposes into H2S gas creating hazard to human health
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Reactive collection allows beaches to be unusable
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Marine protected areas become smothered
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Increasing marine life deterioration increases Sargassum
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Trawling
02
Sargassum as well as being an ecological disaster is an ecological haven, trawling:
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Captures Marine life
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Kills Megafauna
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Despurses Sargassum (into smaller matts making it worse)
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Protect Marine Protected Areas Only
04
Also included in our plan but only partly effective
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Additional fish life and crustaceans break down Sargasum faster
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Not effective enough to deal with mass influxes
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Does not fully support economic stability for the country economy
What this enables:
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3 drone vessels (sensor sets + towable boom)
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1 offshore support vessel (70m)
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Data management + satellite data + targeted buoy network deployment + command center
What is achieved:
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Target $150M/year revenue contract
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Defense for Puerto Rico’s Eastern coastline (target 1/3 reduction)
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EBIT 50–60%
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Scalable proof of concept for national/regional expansion
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Financial Targets:
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Coastline length protected (miles/km)
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Sargassum Intercepted/processed (tons)
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% reduction in beaching / beaching reductio
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Response time to deploy (hours/days)
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If site is fundraising-only/private, financial targets are acceptable—keep them and clearly separate public vs private version.
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