Objects moving through water or other high-density fluids may require controlled deceleration, stabilization, drift reduction or recovery.
APCO Aviation Defense develops deployable defense textile solutions that create hydrodynamic drag to control the movement of marine platforms, underwater vehicles, payloads and other critical assets.
Parachutes, drogues and flexible drag devices can also operate in fluids other than air.
In water and other liquids, the surrounding medium creates greater resistance and changes how the system opens, transfers loads and behaves after deployment.
These solutions may be used as soft anchors for boats, underwater brakes for torpedoes or test vehicles, or deceleration and stabilization systems for AUVs, UUVs, ROVs, subsea payloads, sensors, buoys and marine equipment.
Depending on the application, the solution may function as an underwater parachute, marine drogue, sea anchor or soft braking device.
Once deployed, the textile structure opens in the surrounding fluid and creates hydrodynamic drag.
This drag can reduce speed, limit drift, stabilize heading, control underwater descent, reduce impact with the seabed or support recovery.
The structure’s area, geometry, porosity and tether arrangement determine the drag force, opening load and stability it creates.
The system does not work exactly like an aerial parachute. It must be engineered around the density, viscosity and movement of the operating fluid.
Material selection depends on the operating fluid, pressure, deployment loads, exposure duration and reuse requirements.
Possible constructions may use:
The selected construction must balance structural strength, abrasion resistance, corrosion protection, flexibility, packed volume, system weight and hydrodynamic performance.
Waterproof fabric is not always required. In some systems, controlled porosity is necessary to manage drag, opening loads and stability.
Your team brings the platform, mission and underwater operating requirements. APCO Aviation Defense brings parachute engineering, flexible drag-device design and defense textile expertise.
Together, both teams define the attachment interface, available packing space, deployment method, tether arrangement and required system behavior.
Canopy geometry, porosity, bridles, reefing, deployment containers, release mechanisms, flotation, ballast and retrieval elements can then be developed around the platform as one integrated solution.
We work with your team through every stage of the project to deliver reliable, mission-ready solutions.
Align on mission needs, operational constraints, and success criteria.
Engineer lightweight, low-bulk solutions built around performance.
Prototype and test to verify reliability and safety.
Manufacture with quality control and timely delivery.
Provide documentation, training, and ongoing support.
APCO Aviation Defense works within the standards, certifications, and regulatory frameworks that support defense and aerospace programs.
APCO Aviation Defense combines more than 50 years of aviation manufacturing experience with parachute engineering, flexible drag structures and defense textile expertise. This allows underwater deceleration, hydrodynamic loads, deployment and platform integration to be considered as connected parts of the same solution.
Solutions are shaped around what must be recovered, captured or protected.
Compact textile solutions help reduce integration burden and support prototypes, small production runs and larger project needs without requiring large batches.
Net materials, deployment logic and structural behavior are evaluated for the application.
Selection and development are guided by the operating conditions and the validation required.
Explore ready product options developed for lightweight recovery, precision airdrop and mission-ready integration.
Controlled descent solutions for speed reduction and safer recovery.
Steerable canopy solutions for guided descent and improved landing control.
High-performance gliding parachutes for precision recovery and delivery.
Lightweight cruciform and cross parachutes for recovery applications.
Practical guidance on UAV recovery, parachute systems and protective textiles from APCO’s engineering team.
An underwater deceleration system is a deployable textile structure designed to create hydrodynamic drag in water or another high-density fluid. It can be used to reduce speed, stabilize movement, limit drift or support controlled recovery.
Once deployed, the textile structure opens in the surrounding fluid and creates drag. Its area, geometry, porosity and tether arrangement influence the resulting deceleration, opening loads and stability.
Water and other liquids are much denser than air, so the system experiences different loads and opening behavior. The design therefore needs to account for the density, viscosity and movement of the operating fluid.
Applications can include AUVs, UUVs, ROVs, torpedoes, test vehicles, subsea payloads, sensors, buoys, boats and other marine equipment requiring controlled movement or recovery.
Depending on the application, materials may include high-tenacity polyester, nylon, UHMWPE fibres, aramid fibres, coated textiles, mesh or ribbon constructions, together with marine-grade hardware.
Not necessarily. In some systems, controlled porosity is important for managing drag, opening loads and stability, so waterproof construction may not be required.
Integration can include attachment points, available packing space, deployment method, tether arrangement and required system behavior. Elements such as bridles, reefing, release mechanisms, flotation, ballast and retrieval components may also form part of the overall solution.
