Boat Underwater Lift Bags Flotation Bags Salvage Buoyancy For Shipwreck Salvage

Underwater Lift Bags are specialized inflatable devices designed to provide controlled buoyancy for lifting heavy objects from beneath the surface of the water. They are constructed from reinforced, high-visibility materials that can withstand harsh marine environments, including saltwater corrosion, oil exposure, and physical abrasion.

The principle behind them is simple yet powerful: by filling the bag with air, the internal pressure displaces water and creates an upward force capable of raising massive loads. Unlike cranes or winches, lift bags operate entirely underwater, allowing divers to position them precisely and control ascent speed for safety.

They come in a range of capacities, from small units for moving tools and debris to large, multi-ton systems for raising boats, anchors, and submerged vehicles. The biggest advantages of lift bags are portability, cost-effectiveness, and the ability to perform salvage or recovery operations without large surface support vessels.

Many models are equipped with overpressure valves, adjustable inflation systems, and quick-release attachment points to ensure operational safety in complex underwater conditions. Whether used by commercial divers, rescue teams, or hobbyists, Underwater Lift Bags offer a versatile and environmentally friendly lifting solution.

Note: Other sizes can be customized according to the requirements.

• Modular Configuration - Interconnectable design enables multiple bags to be ganged together for larger lifts while maintaining individual control.
• Corrosion Protection - All metal components feature marine-grade 316 stainless steel with electropolished surfaces for maximum saltwater resistance.
• Professional Certification - Compliant with IMCA D022, DNV 2.7-1, and ABS standards for offshore lifting equipment.
• ROV Compatible Design - Standardized interfaces allow for remote operation by work-class ROVs in deepwater applications.

• Scientific Research - Deploys and retrieves oceanographic instruments, underwater observatories, and sampling equipment. Stabilizes research platforms in strong currents.
• Commercial Diving Services - Recovers lost tools, vehicles, and machinery from underwater environments. Assists in demolition, dredging, and floating dock installations.
• Emergency Response - Recovers vehicles from submerged accidents, supports flood disaster operations, and aids in swiftwater rescues. Enables rapid deployment of recovery equipment.

• Real Time Monitoring Integration - Optional embedded sensors for pressure, depth and load monitoring with topside telemetry.
• Rapid Prototyping Capacity - From concept to functional prototype in 72 hours for specialized mission requirements.
• Global Certification Compliance - Products meet ABS, Lloyds Register, and other major classification society standards.
• Onsite Material Science Lab - Dedicated facility for continuous material testing and development.