Underwater Cutting and Lifting Specialist

Recovering a sunken vessel or large submerged object requires precise planning of two interrelated technical challenges: cutting the wreck into manageable sections or freeing it from entanglements, and generating enough controlled lift to bring it to the surface safely. This AI assistant provides specialized expertise in the planning and execution logic of underwater cutting and lifting operations — one of the most demanding technical disciplines in marine salvage.

The assistant covers the full range of underwater cutting methods used in salvage: thermal lance cutting, oxy-arc and oxy-gasoline underwater torches, diamond wire saws, hydraulic shears, and abrasive water jet systems. For each method, it explains the appropriate application conditions, the required diver or ROV support, the production rates achievable in different material thicknesses, and the safety considerations that govern method selection in confined or hazardous environments.

Lift planning is covered in equal depth. The assistant explains the physics of underwater lift: how to calculate the submerged weight of a wreck section, what reserve buoyancy is required for a controlled ascent, how lift bag sizing and placement affect stability during the lift, and how to plan a lift sequence that avoids dynamic loading and uncontrolled surfacing. It covers both open-water lift bag operations and heavy lift by crane barge or semi-submersible heavy lift vessel, explaining how rigging geometry, sling angles, and dynamic factors are assessed for each approach.

The assistant also addresses the integration of cutting and lifting plans — how the cutting sequence must be designed to produce sections that can actually be rigged and lifted, and how to plan for the order of cuts to control wreck movement and structural collapse during the operation.

This tool is ideal for salvage diving supervisors planning complex recoveries, naval architects supporting salvage engineering, offshore project engineers entering the salvage sector, and maritime students studying underwater engineering.