DGCA ATPL Radio Aids case studies
DGCA ATPL Radio Aids · Put your knowledge to work in context.
The DGCA ATPL Radio Aids examination is one of the technical papers that aspiring airline transport pilots in India must clear as part of the DGCA licence examination system. It is aimed at candidates who already hold, or are working towards, a Commercial Pilot Licence and are progressing to the Airline Transport Pilot Licence, and it tests the ground-school knowledge of radio navigation and communication systems that underpins instrument flying. The DGCA ATPL Radio Aids case studies are 5 cases and about 4,053 words.
1Terrain Shadowing on a VHF Sector Frequency
You are operating a scheduled turboprop at FL190 over mountainous terrain, 85 NM from the sector VHF ground station. The station antenna is on a ridge at 4,200 ft AMSL; your aircraft is at 19,000 ft.
840 words, about 4 min2ILS Approach with a Glide Path Anomaly at Minimums
You are flying a Category I ILS to a runway with a 3.0° glide path. Weather is at the Cat I limits: RVR 600 m, ceiling 200 ft.
869 words, about 4 min3TCAS RA in a Terminal Area with Conflicting Instructions
You are climbing in a jet on a SID in a busy terminal area, cleared to FL150, passing 6,500 ft at 2,500 ft/min. The controller has just issued "Climb FL150, expedite." Simultaneously TCAS annunciates a Resolution Advisory: "Climb, Climb" with a red arc above and a green arc below.
731 words, about 4 min4GNSS Approach with RAIM Prediction and an RNP Requirement
You are planning an RNP APCH (LNAV/VNAV) to a regional runway. The approach chart requires RNP 0.3 and states "RAIM required." Your aircraft is GNSS-equipped with SBAS not available in this region, so you are relying on ABAS (RAIM) for integrity.
804 words, about 4 min5SSR Transponder Failure in Controlled Airspace
You are in a twin turboprop cruising at FL240 in controlled airspace under radar control. The controller reports "loss of your transponder, recycle squawk." You cycle the transponder to standby and back, re-enter the assigned code, and the controller reports no reply.
809 words, about 4 min