Correct: B)
Explanation: Modifying an accident site is prohibited without formal authorization from the investigation authority, except for essential rescue measures.
Correct: D)
Explanation: If the pilot loses sight of the tow plane, immediately release the rope. Continuing tow flight without seeing the tow plane is extremely dangerous.
Correct: D)
Explanation: Wearing a parachute is not mandatory for gliders in Switzerland for normal flights. It is recommended but not regulatory.
Correct: B)
Explanation: With tailwind on a 400 m field: approach slightly above minimum speed and at a lower height than with headwind. Tailwind increases ground speed.
Correct: C)
Explanation: A powered motorglider coming from the right has right of way (converging routes rule). You must give way to the right to let it pass.
Correct: D)
Explanation: In a glider-specific restricted zone (LS-R), reduced distances apply: 50 m vertically and 100 m horizontally from clouds (instead of standard distances).
Correct: B)
Explanation: In case of parachute bailout: 1) Release canopy 2) Unfasten harness 3) Jump 4) Open parachute. Order is crucial for safety.
Correct: D)
Explanation: Landing on a slope: always downhill into the wind. Uphill + tailwind would dangerously extend the landing distance.
Correct: A)
Explanation: The best field for an off-field landing is a large flat field, oriented into the wind, free of obstacles on the approach axis.
Correct: B)
Explanation: A fuselage broken near the rudder after a ground loop = serious accident. Immediately notify the accident investigation bureau (via REGA if necessary).
Correct: C)
Explanation: When an off-field landing on inclined terrain is unavoidable, the correct technique is to approach with increased speed and perform a quick, firm flare to match the glider's pitch attitude to the slope angle at touchdown — this minimises the relative vertical velocity on contact. Landing down a ridge (option A) dramatically increases ground speed and roll-out distance, risking a collision with terrain ahead. Approaching parallel to the ridge (option D) ignores the slope problem. Minimum speed (option B) leaves no energy margin for the flare on sloped ground.
Correct: D)
Explanation: If the gear is not extended on final approach and there is insufficient height to safely extend it, the safest action is to complete a gear-up landing at minimum speed, accepting a belly-landing with controlled, gentle touchdown. Extending gear at the last moment (option B) risks an asymmetric or partially extended gear, which is more dangerous. Retracting flaps to buy time (option A) alters the approach profile unpredictably close to the ground. Landing without gear at higher speed (option C) worsens the damage and increases risk of injury.
Correct: B)
Explanation: During a winch launch, the maximum pitch (steep climb) attitude should not be adopted until approximately 50 m AGL, while maintaining a safe minimum launch speed. Below 50 m, a cable break would not allow a straight-ahead landing if the nose is too high; above 50 m there is sufficient height to recover. 15 m is too low and dangerous. 150 m is overly conservative and wastes the launch energy. Pitching up immediately after liftoff (option D) is extremely hazardous regardless of headwind.
Correct: C)
Explanation: Approach and landing speed must account for both aircraft weight and wind conditions (including gusts). A heavier aircraft requires a higher approach speed to maintain adequate safety margin above stall. Higher winds — especially gusts — require an additional speed increment to avoid sudden loss of airspeed and lift. Altitude alone does not directly determine approach speed. Options A, B, and D are incomplete; option C correctly names both weight and wind speed.
Correct: C)
Explanation: During an outlanding, visual cues in the environment are the most reliable and immediately available indicators of wind direction and strength: smoke drifting from chimneys, flags, and rippling crops clearly show the current local wind. A weather forecast (option D) may not reflect local conditions precisely at that moment. Radio contact with other pilots (option B) is unreliable and slow. The windsock at the departure airfield (option A) is irrelevant to conditions at the outlanding site.
Correct: B)
Explanation: On a downhill grass area, landing uphill means the aircraft is climbing toward the ground, which naturally decelerates the glider and shortens the roll-out — this is the recommended technique. Landing diagonally downhill (option C) risks ground-looping. Using wheel brakes without airbrakes (option D) may be ineffective or cause a nose-over on rough terrain. Landing with gear retracted and stalled (option A) is dangerous and unnecessary.
Correct: D)
Explanation: Before initiating any turn during flight, the pilot must first check that the airspace in the intended direction is clear of other aircraft, obstacles, and restricted areas. A coordinated turn (option A) is always desirable but is secondary to the lookout. Thermal clouds (option C) and loose objects (option B) are not safety priorities before a heading change. Collision avoidance through a proper lookout is the primary concern.
Correct: B)
Explanation: A tailwind during winch launch means the aircraft has a lower airspeed relative to the ground at any given ground speed, so more ground roll is needed before reaching flying speed — liftoff takes longer and the pilot must monitor the airspeed carefully. Tailwind does not reduce the required cable tension rating (option A). Tailwind from behind reduces effective airspeed, so the roll is longer, not shorter (option D is incorrect). Pulling back immediately after liftoff in a tailwind is hazardous (option C).
Correct: D)
Explanation: On the base-to-final turn, a maximum bank angle of 30° is recommended to keep turn coordination manageable and to avoid the risk of a low-speed stall-spin. The yaw string (slip indicator) and airspeed must be closely monitored because crosswind complicates the turn geometry. If the aircraft overshoots the final track, a gentle track correction is made after the turn — never a steep rudder input to force alignment, as this risks a skidded stall. Options A and C allow up to 60° bank, which is excessive and dangerous near the ground.
Correct: D)
Explanation: When two sailplanes are circling in the same thermal in close proximity, the most effective way to create separation is to increase speed, which increases the turn radius and moves the faster aircraft to a position opposite in the circle (180° apart), creating the maximum safe separation. Reducing speed (option C) tightens the radius and closes the gap. Reducing bank (option B) also increases radius but slowly. Increasing bank (option A) makes the glider smaller in profile but does not solve the proximity problem.
Correct: C)
Explanation: Standard traffic pattern heights for a glider are approximately 150–200 m AGL abeam the threshold (downwind leg) and 100 m AGL after the final turn. These heights give the pilot adequate time and space to plan the approach and use airbrakes effectively for a precise landing. The lower heights in options D and B leave insufficient margin for corrections; the higher values in option A are excessive for unpowered glider operations.
Correct: D)
Explanation: In strong winds, the windward (upwind) wing should be placed on the ground to prevent the wind from getting under it and flipping the aircraft. The wing is then weighted down with a sandbag or similar weight, and the control surfaces (rudder) are secured to prevent them from being damaged by aerodynamic buffeting. Pointing the nose into wind (options A and B) presents a large fuselage surface to cross-gusts and does not protect the wings. Placing the downwind wing on the ground (option C) allows the upwind wing to be lifted by the wind.
Correct: D)
Explanation: Mountain ridges produce significant turbulence on the lee side and in the rotor zone, but turbulence can also occur directly at the ridge crest. Flying slightly faster than normal provides better control authority and reduces the risk of a stall in turbulence. Reducing to minimum speed (option B) is dangerous as turbulence could cause the aircraft to stall. Overflight of national parks (option A) is a regulatory matter, not a primary safety consideration when crossing ridges. Circling birds indicate thermals (option C) but this does not address the turbulence hazard of ridge crossing.
Correct: C)
Explanation: Buffeting felt through the elevator stick is a classic aerodynamic warning of an approaching stall: separated airflow from the wings passes over the tail surface, causing the elevator to vibrate. This occurs at low airspeed when the angle of attack exceeds the critical angle. A forward CG (option A) makes the aircraft more stable and resistant to stall. A dirty airframe (option B) may affect performance but does not directly cause elevator buffeting. Turbulence at high speed (option D) would be felt as general airframe shaking, not specifically at the elevator.
Correct: C)
Explanation: A pre-flight check (walk-around and cockpit check) must be performed before the first flight of the day and after every change of pilot, because each pilot is responsible for verifying the aircraft's airworthiness before they fly it. A check after every assembly (option D) applies to aircraft that are dismantled between flights (trailer gliders) — this is a separate requirement. Monthly checks (option A) describe maintenance intervals, not pre-flight procedures. Option B ('before every flight') is too broad and would be burdensome; it is the daily first-flight and pilot-change rule that is standard practice.
Correct: D)
Explanation: ICAO Annex 1 defines flight time for aircraft as the total time from the moment an aircraft first moves under its own power for the purpose of taking off until the moment it finally comes to rest at the end of the flight. For sailplanes (non-motorised), this is interpreted as from first movement (e.g., the start of the winch run or aerotow) until the aircraft comes to rest after landing. Option B describes block time for powered aircraft. Option C is too narrow (only the take-off and landing roll). Option A describes a duty period concept, not a single flight.
Correct: D)
Explanation: With strong gusts (here: wind 15 kt, gusts 25 kt — a 10 kt spread), the pilot must add a gust allowance to the normal approach speed to ensure that a sudden drop in airspeed caused by a gust does not reduce speed below the stall speed. Firm rudder inputs are needed to correct attitude changes caused by the gusty conditions. Minimum speed (option A) provides no safety margin in gusts. Normal speed without gust correction (option C) is insufficient. Avoiding spoilers/airbrakes (option B) removes the ability to control the glide path precisely.
Correct: D)
Explanation: Buffeting felt through the elevator stick is the tactile warning that the wing has approached its critical angle of attack and airflow is beginning to separate — the pre-stall buffet. This is caused by turbulent separated airflow from the wing reaching the tail and exciting the elevator. Option C (CG too far forward) makes the aircraft pitch-stable and stall-resistant. Option A (dirty airframe) degrades performance but does not specifically cause elevator buffeting. Option B (high speed turbulence) produces general airframe vibration unrelated to stall.