Spanwells

Spanwells are a type of submersible vehicle designed for underwater construction and inspection. They are essentially small, often unmanned, robotic devices that can be deployed from a surface vessel or directly from shore. Their primary function is to access areas beneath the water's surface that are difficult or impossible to reach with traditional diving methods.

These vehicles are typically equipped with a range of sensors and tools. These can include high-definition cameras for visual inspection, sonar systems for mapping and detecting objects, and manipulators or robotic arms for performing tasks such as the placement of cables, the repair of underwater structures, or the collection of samples. The design of spanwells can vary significantly depending on their intended application, ranging from simple camera-equipped units to more complex, multi-functional platforms.

Spanwells are particularly useful in bridge construction and maintenance, where they can inspect pilings and foundations. They are also employed in the oil and gas industry for inspecting pipelines and subsea equipment, and in scientific research for exploring marine environments and deploying instruments. Their ability to operate in challenging conditions, such as strong currents or murky water, makes them an invaluable tool in many underwater operations.