"First RNP CAT H helicopter approach operationalised in India"
RNP CAT H
A helicopter-specific Required Navigation Performance satellite-based approach procedure.
Required Navigation Performance
A PBN specification defining navigation accuracy, integrity, and availability.
Helicopter operations depend on precision navigation to manage challenging terrain, urban obstacles, and short-runway or helipad approaches. Modern civil and military aviation increasingly use satellite-enabled procedures collectively called Performance-Based Navigation (PBN). Within PBN, Required Navigation Performance (RNP) is a specification that mandates accuracy, integrity, and availability so aircraft can fly predictable, optimised paths even in constrained airspace. Aviation authorities worldwide have adopted RNP-based approaches to improve safety, reduce missed approaches, and enable all-weather access to complex sites.
In India, the two institutional actors that govern these procedures are the Airports Authority of India (AAI), which develops instrument-procedure designs for airports, and the Directorate General of Civil Aviation (DGCA), which approves and certifies those procedures for civilian operations. Aerospace manufacturers and test organisations validate new approaches through flight trials and safety assessments before regulators grant operational approval. These institutional roles align with ICAO standards on PBN, which India follows as a contracting state.
A helicopter-specific RNP approach variant addresses rotary-wing performance and operational needs distinct from fixed-wing procedures. RNP CAT H is a satellite-guided, precision navigation procedure designed specifically for helicopters. It prescribes required lateral and vertical navigation accuracy and allows helicopters to fly highly accurate, optimised paths tailored to rotorcraft flight envelopes. Compared with conventional visual or non-precision instrument approaches, RNP CAT H techniques shorten flown paths, reduce pilot workload in instrument conditions, and lower missed-approach rates.
Technically, these procedures rely on a certified combination of onboard navigation systems, satellite positioning (GNSS), and procedure design that accounts for obstacles and terrain. …
Match the following institutions with their roles in the HAL RNP CAT H operationalisation:
A.AAI
B.DGCA
C.HAL —
1.Validated procedure through flight trials
2.Developed procedure
3.Approved procedure for operational use
Which of the following statements about RNP CAT H helicopter approach are correct? 1. It is a satellite-guided precision navigation procedure for helicopters. 2. It allows highly accurate optimised paths to navigate terrain and urban obstacles. 3. Procedure development and operational approval are normally handled by AAI and DGCA respectively.
Which of the following are immediate operational benefits of an RNP CAT H helicopter approach? 1. All-weather access 2. Reduced approach time 3. Increased terminal airspace capacity 4. Reduced noise footprint over cities
After commercial operations ceased, HAL Airport primarily handles which of the following activities?
Assertion (A): RNP CAT H approaches reduce the noise footprint over cities. Reason (R): RNP CAT H allows tighter, repeatable flight tracks concentrating operations over narrower corridors.
Want the full note, Prelims Facts & MCQ answers?
Create a free account — takes less than a minute.
Create free account