In the development of marine resources and the maintenance of waterway security, underwater cutting operations play an indispensable role. As an advanced tool, underwater cutting equipment provides robust technical support for subsea construction work, enabling the efficient and safe completion of various cutting tasks in complex underwater environments.

Underwater cutting machines are specialized equipment capable of performing efficient cutting operations in submerged environments. They find extensive application in marine engineering, shipwreck salvage, pipeline maintenance, platform dismantling, and underwater rescue operations. During underwater operations, traditional cutting methods are often constrained by factors such as water pressure and currents. Underwater cutting machines overcome these challenges to accomplish precise and highly efficient cutting tasks.

Underwater cutting machines operate based on physical processes such as high-pressure water jets or electric arc discharge. Electric cutting systems feature low energy consumption, minimal noise, and high efficiency; high-pressure water-abrasive cutting equipment utilizes high-pressure pumps and abrasives for safe operation in complex environments; electric arc cutters achieve cutting by melting conductive materials through high-temperature arcs.

The underwater cutting machine operates in two modes: ROV and diver-assisted. Hydraulically driven, it can perform operations at depths up to 3,000 meters and is suitable for pipes or structures ranging from 4 to 102 inches in diameter. Equipped with multiple cutting technologies—including diamond wire, high-pressure, flame, blade, and rail cutting—it handles everything from small-diameter pipelines to massive subsea steel structures and reinforced concrete foundations.

During a shipwreck salvage operation, underwater cutting equipment played a crucial role. The rescue team successfully employed underwater cutters to sever the ship's hull structure, removing obstructions that hindered rescue efforts. This created conditions for rescuing trapped personnel and recovering cargo.

Underwater cutting machines enhance the efficiency of subsea operations, reduce risks associated with manual handling, and ensure operational safety and precision. In marine engineering, underwater cutting machines can be used to cut seabed rocks, pipelines, platform structures, and more, providing support for projects such as oil and gas extraction and offshore wind farm construction. Regarding water safety, they can be employed for underwater rescue and salvage operations, rapidly cutting through sunken vessel obstructions to clear rescue pathways and gain precious time for saving lives.