DRDO Successfully Tests Indigenous Air-Droppable Container ADC-150

DRDO Successfully Tests Indigenous Air-Droppable Container ADC-150

Why in News? 

Recently, the Defence Research and Development Organisation (DRDO) and the Indian Navy successfully tested the indigenous Air-Droppable Container ADC-150, designed to deliver 150 kg of supplies from aircraft to ships at sea.

What is an Air-Droppable Container ADC-150?

• About: The Air-Droppable Container (ADC-150) is an indigenously developed logistics delivery system designed by the Defence Research and Development Organisation for the Indian Navy. 

• It enables aircraft to air-drop critical supplies to naval ships at sea, especially during emergencies or operations far from the coast. 

• Purpose: The primary objective of ADC-150 is to rapidly deliver essential stores, spare parts, and medical supplies to naval vessels deployed in distant maritime zones, ensuring operational continuity.

• • Development Agencies: Several DRDO laboratories collaborated in the project, including Naval Science and Technological Laboratory (NSTL), Aerial Delivery Research and Development Establishment (ADRDE), and Defence Research and Development Laboratory (DRDL).

• Features:

• Payload Capacity: The system can carry a maximum payload of 150 kg, transporting engineering spares, emergency equipment, or essential supplies needed by ships. 

• Platform Integration: ADC-150 is designed to be deployed from the P-8I maritime surveillance aircraft operated by the Indian Navy. The container is integrated with the aircraft’s Bomb Release Unit (BRU) to enable controlled air-drop operations. 

• Delivery Mechanism: The container uses a two-stage parachute system that slows its descent and ensures a safe landing on water, preventing damage to the supplies inside during impact.

• Indigenous Design: ADC-150 is fully designed and developed in India using advanced materials such as Glass-Fibre Reinforced Polymer (GFRP), ensuring lightweight construction while maintaining high durability.

• Specifications: The container has a length of about 2.02 m and diameter of 324 mm, with a total weight of around 130 kg. It is engineered to withstand high shock and impact forces during deployment. 

• Navigation: ADC-150 incorporates a GPS-based system and rechargeable battery, enabling location tracking and identification after landing in the sea. 

How Air-Droppable Container Systems Work in Naval Operations?

• Mission-Specific Rigging: Naval technicians pack essential materials into A-22 cargo bags or heavy-duty tri-wall containers. They secure honeycomb energy-dissipating material to the base to absorb the impact shock during the high-speed water landing.
• Flight Path Navigation: Pilots calculate the Continuously Computed Drop Point by analyzing real-time wind vectors and aircraft speed. This calculation ensures the container reaches the precise intercept coordinates of the moving naval vessel.
• Gravity-Assisted Release: The pilot maintains a nose-high pitch as the loadmaster releases the heavy-duty locking mechanisms. The heavy container slides across the cargo rollers and exits the aircraft via the open rear ramp.
• Static Line Deployment: A nylon static line triggers the deployment of the small pilot chute immediately after exit. This pilot chute pulls the G-12 main parachute from its bag to slow the descent to 28 feet per second.
• GPS-Guided Navigation: Advanced Joint Precision Airdrop Systems utilize internal GPS-guided actuators to control the parachute. These motors pull the steering risers to navigate the cargo toward the specific latitude and longitude of the ship.
• Impact Release Mechanism: The container triggers a water-activated release sensor upon striking the ocean surface. This mechanism detaches the parachute canopy instantly to prevent the wind from dragging the payload away from the recovery team.
• Hydrostatic Buoyancy Activation: Internal flotation bladders inflate automatically to provide positive buoyancy to the heavy load. The system maintains a low center of gravity to keep the waterproof seals safely above the waterline.
• Active Location Signaling: An integrated EPIRB transmitter sends an automated distress signal to the ship’s radar system. High-intensity LED strobes and fluorescent sea-marker dye help the bridge crew spot the container in low-visibility conditions.
• Maritime Recovery Procedure: The receiving ship maneuvers alongside the floating package or launches a Rigid Hull Inflatable Boat. Sailors use grapnel hooks to secure the lifting eyes before a shipboard crane hoists the cargo.

Significance of Air-Droppable Container Systems

• Strategic Power Projection: Systems like the Sahayak-NG enable navies to support warships over 2,000 km from the coast. This removes the need for ships to return to port, maintaining a constant blue-water presence in contested zones.
• Precision Targeting Accuracy: Modern units utilize GPS-aided guidance to achieve a 100% success rate in recent flight trials. Payload dispersion is restricted to a 50-metre radius, ensuring accurate delivery to moving vessels in high-wind conditions.
• Increased Logistical Volume: The transition to the ADC-150 has tripled previous capacities from 50 kg to 150 kg. This upgrade allows for the transport of heavy-duty spare parts that were previously impossible to deliver via air.
• Rapid Fleet Restoration: Aircraft deliver critical stores within hours, compared to days for surface ships. This “quick response” is vital for ships under distress, drastically reducing operational downtime during mission-critical phases.
• Disaster Relief Capability: These containers are “game-changers” for Humanitarian Assistance and Disaster Relief (HADR). They allow for the delivery of food to remote islands where damaged ports prevent traditional docking or landing.
• Technological Self-Reliance: Indigenous development by DRDO laboratories like NSTL eliminates dependence on foreign OEMs. This secures the maritime supply chain against external geopolitical pressures and ensures operational autonomy for the fleet.