One of the most practical (and increasingly urgent) use cases for autonomous systems in the water domain is cleaning water from floating waste or impurities, especially in urban and coastal environments.Why urban waters need frequent cleaning
Why urban waters need frequent cleaning
In cities and near the coast, litter and debris often end up in the water. Washed in by rain, wind, tide, or stormwater runoff. Many waterways and basins effectively become “collection points” because they are the lowest points in the surrounding environment. The result: marinas, rivers, canals, and harbor basins require regular, repetitive cleaning.
This is exactly the type of task that can be automated well. Think of the success of robot vacuum cleaners and autonomous lawn mowers: repetitive work, defined operating areas, and predictable routines. Maritime cleaning can follow a similar path.
How autonomous cleaning can work in practice
A typical setup for autonomous cleaning in a marina or canal can take different shapes:
- The cleaning drone operates in a predefined area, collecting waste on the surface.
- At fixed docking points, the system can offload collected waste and recharge.
- A control center (or a remote operator) can monitor operations for safety and regulatory compliance.
This makes autonomous cleaning especially attractive for narrow urban canals, where access for manual cleaning can be difficult and expensive. It is no rocket science but is being widely applied especially in Marinas and port areas.
More than cleaning: doing multiple jobs at once
A key advantage of autonomous platforms is that they can combine tasks with additional sensors. For example, during canal cleaning, the same system could also:
- Map sediment and document silting or erosion
- Capture evidence of washouts, changes in canal geometry, or shallow spots
- Support monitoring and inspection, especially when operations are supervised from a control center
In other words, surface cleaning can be the “primary mission,” while surveying and monitoring become valuable secondary missions. So maybe drones will rediscover bicycles and other lost treasures.
Ocean waste removal: a growing challenge (and opportunity)
Waste disposal is not only a local problem—it has become a global issue. Large-scale ocean cleanup has been gaining attention for years. For instance, Maersk and the non-profit The Ocean Cleanup have been involved in initiatives aimed at removing plastic waste from the oceans.
Today, drones are not yet widely used in these large offshore projects. However, autonomous systems could, in the long run, help reduce operating costs by enabling more persistent, scalable, and data-driven cleanup operations.
Urban reality: still mostly manual work
Despite the technology potential, most cleaning in urban waterways is still performed manually by municipal services. That said, there is already a growing ecosystem of smaller autonomous cleaning platforms—often designed for short-range operations in marinas and ports.
Given the speed of innovation in consumer robotics, it is reasonable to expect that this segment will evolve quickly as well.
Manufacturers and the current market landscape
There are already several manufacturers offering (mostly electric) autonomous or remotely operated cleaning solutions for marinas, ports, and sheltered waters. Examples include:
- Agistar
- Ekkopol
- Efinor
- RanMarine
- …and many more
Many current products focus on relatively small operating areas—well suited to marinas, inner harbors, and canals.
Different collection concepts: pumps vs. collection baskets
Not all cleaning drones work the same way. Common design approaches include:
- Pump-based systems that draw in water and filter out debris.
- Skimming/collection systems that move through the water and physically collect floating waste.
The right concept depends strongly on the use case, the expected waste type, and the local environment.
“Waste” is a broad term—and so is the payload. In maritime cleaning, “waste” can mean many different things:
- Floating plastics and packaging
- Algae and organic material
- Oil films and other hazardous substances
Accordingly, payload and configuration vary. Some systems are optimized to autonomously collect floating debris with minimal human intervention, while others are designed for oil removal or handling more complex contamination scenarios.
