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 high-tenacity polyester, nylon, UHMWPE fibres, aramid fibres, coated textiles, mesh structures, ribbon constructions and marine-grade hardware.
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.
The development process begins by understanding what is moving, how quickly it is moving and what must happen after deployment.
Platform mass, dimensions, deployment velocity, required final speed, stopping distance, operating depth and maximum allowable loads all influence the design.
Buoyancy, ballast, stability, available packing volume and retrieval requirements must also be considered so the system can control movement without creating unacceptable opening loads, oscillation or structural stress.
APCO Aviation Defense supports the complete development process, from the first technical discussion through testing, documentation and production.
APCO Aviation Defense applies its experience in parachute engineering, flexible drag structures and defense textile solutions to systems operating in water and other high-density fluids.
This expertise allows APCO to develop underwater parachutes, marine drogues, soft anchors and hydrodynamic deceleration systems designed around the required movement, drag, opening loads and platform integration.
This capability is supported by:
The result is a customized defense textile solution developed to control movement, manage hydrodynamic loads and preserve critical assets in water and other high-density fluid environments.
Tell us what is moving, which fluid it operates in, how quickly it must slow and what loads the platform can withstand.
Together, we can define a deployable defense textile solution built around the required drag, stability, deployment and recovery conditions.
