From c7fe4faf1aab7bd121763380c10be86d95a80333 Mon Sep 17 00:00:00 2001
From: Matthias Nott <mnott@mnsoft.org>
Date: Sun, 22 Mar 2026 17:21:58 +0100
Subject: [PATCH] fix: Q71 answer correction, Q39 wording, remove bogus Oswald terms

---
 SPL Exam Questions EN/60 - Navigation.md |   68 +++++++++++++++++-----------------
 1 files changed, 34 insertions(+), 34 deletions(-)

diff --git a/SPL Exam Questions EN/60 - Navigation.md b/SPL Exam Questions EN/60 - Navigation.md
index cfe1761..5f84443 100644
--- a/SPL Exam Questions EN/60 - Navigation.md
+++ b/SPL Exam Questions EN/60 - Navigation.md
@@ -130,9 +130,7 @@
 
 #### Key Terms
 
-- **S** — Wing Area — total planform area of the wings
 S — Wing Area — total planform area of the wings
-
 ### Q8: At what positions are the two polar circles located? ^t60q8
 
 [DE](../SPL%20Exam%20Questions%20DE/60%20-%20Navigation.md#^t60q8) · [FR](../SPL%20Exam%20Questions%20FR/60%20-%20Navigation.md#^t60q8)
@@ -189,7 +187,8 @@
 
 #### Key Terms
 
-NM = Nautical Mile(s)
+- **e** — Oswald Efficiency Factor — wing efficiency factor (1.0 for ideal elliptical lift distribution)
+- **NM** = Nautical Mile(s)
 ### Q11: Point A lies at exactly 47°50'27''N latitude. Which point is precisely 240 NM north of A? ^t60q11
 
 [DE](../SPL%20Exam%20Questions%20DE/60%20-%20Navigation.md#^t60q11) · [FR](../SPL%20Exam%20Questions%20FR/60%20-%20Navigation.md#^t60q11)
@@ -271,7 +270,8 @@
 
 #### Key Terms
 
-NM = Nautical Mile(s)
+- **e** — Oswald Efficiency Factor — wing efficiency factor (1.0 for ideal elliptical lift distribution)
+- **NM** = Nautical Mile(s)
 ### Q15: How much time elapses as the sun traverses 20° of longitude? ^t60q15
 
 [DE](../SPL%20Exam%20Questions%20DE/60%20-%20Navigation.md#^t60q15) · [FR](../SPL%20Exam%20Questions%20FR/60%20-%20Navigation.md#^t60q15)
@@ -311,9 +311,7 @@
 
 #### Key Terms
 
-- **D** — Drag
 D — Drag
-
 ### Q17: The sun traverses 10° of longitude. What is the corresponding time difference? ^t60q17
 
 [DE](../SPL%20Exam%20Questions%20DE/60%20-%20Navigation.md#^t60q17) · [FR](../SPL%20Exam%20Questions%20FR/60%20-%20Navigation.md#^t60q17)
@@ -628,6 +626,7 @@
 
 #### Key Terms
 
+- **W** — Weight — force due to gravity acting on the aircraft (W = m × g)
 - **CH** = Compass Heading
 - **DEV** = Compass Deviation
 - **MH** = Magnetic Heading
@@ -887,10 +886,10 @@
 
 #### Key Terms
 
+- **m** — mass of the aircraft
 - **ICAO** = International Civil Aviation Organization
 - **NM** = Nautical Mile(s)
 - **SPL** = Sailplane Pilot Licence
-- **m** — mass of the aircraft
 ### Q46: What is the distance from VOR Bruenkendorf (BKD) (53°02'N, 011°33'E) to Pritzwalk (EDBU) (53°11'N, 12°11'E)? ^t60q46
 
 [DE](../SPL%20Exam%20Questions%20DE/60%20-%20Navigation.md#^t60q46) · [FR](../SPL%20Exam%20Questions%20FR/60%20-%20Navigation.md#^t60q46)
@@ -953,6 +952,7 @@
 
 #### Key Terms
 
+- **W** — Weight — force due to gravity acting on the aircraft (W = m × g)
 - **MC** = Magnetic Course
 - **TC** = True Course
 - **VAR** = Magnetic Variation
@@ -975,11 +975,11 @@
 
 #### Key Terms
 
+- **TAS** = True Airspeed
+- **GS** = Ground Speed
 - **ETA** = Estimated Time of Arrival
 - **ETD** = Estimated Time of Departure
-- **GS** = Ground Speed
 - **NM** = Nautical Mile(s)
-- **TAS** = True Airspeed
 ### Q50: Given: True course from A to B: 283°. Ground distance: 75 NM. TAS: 105 kt. Headwind component: 12 kt. ETD: 1242 UTC. What is the ETA? ^t60q50
 
 [DE](../SPL%20Exam%20Questions%20DE/60%20-%20Navigation.md#^t60q50) · [FR](../SPL%20Exam%20Questions%20FR/60%20-%20Navigation.md#^t60q50)
@@ -1004,14 +1004,12 @@
 
 #### Key Terms
 
+- **TAS** = True Airspeed
+- **GS** = Ground Speed
 - **ETA** = Estimated Time of Arrival
 - **ETD** = Estimated Time of Departure
-- **GS** = Ground Speed
 - **ICAO** = International Civil Aviation Organization
 - **NM** = Nautical Mile(s)
-- **TAS** = True Airspeed
-
-**Permitted aids at the exam:** ICAO 1:500'000 Switzerland chart, Swiss gliding chart, protractor, ruler, mechanical DR calculator, compass, non-programmable scientific calculator (TI-30 ECO RS recommended). No alphanumeric or electronic navigation computers allowed.
 ### Q51: What is the latest time we must land? ^t60q51
 
 [DE](../SPL%20Exam%20Questions%20DE/60%20-%20Navigation.md#^t60q51) · [FR](../SPL%20Exam%20Questions%20FR/60%20-%20Navigation.md#^t60q51)
@@ -1297,7 +1295,8 @@
 
 #### Key Terms
 
-NM = Nautical Mile(s)
+- **e** — Oswald Efficiency Factor — wing efficiency factor (1.0 for ideal elliptical lift distribution)
+- **NM** = Nautical Mile(s)
 ### Q70: Flight time from Laax 14:52 to Oberalp 15:09? ^t60q70
 
 [DE](../SPL%20Exam%20Questions%20DE/60%20-%20Navigation.md#^t60q70) · [FR](../SPL%20Exam%20Questions%20FR/60%20-%20Navigation.md#^t60q70)
@@ -1363,6 +1362,7 @@
 
 #### Key Terms
 
+- **m** — mass of the aircraft
 - **ATC** = Air Traffic Control
 - **CTR** = Control Zone
 - **ICAO** = International Civil Aviation Organization
@@ -1370,7 +1370,6 @@
 - **MSL** = Mean Sea Level
 - **TMA** = Terminal Manoeuvring Area
 - **VFR** = Visual Flight Rules
-- **m** — mass of the aircraft
 ### Q75: TC from Jungfrau to Bellechasse? ^t60q75
 
 [DE](../SPL%20Exam%20Questions%20DE/60%20-%20Navigation.md#^t60q75) · [FR](../SPL%20Exam%20Questions%20FR/60%20-%20Navigation.md#^t60q75)
@@ -1416,8 +1415,8 @@
 
 #### Key Terms
 
-- **GS** = Ground Speed
 - **TAS** = True Airspeed
+- **GS** = Ground Speed
 - **TC** = True Course
 - **TH** = True Heading
 - **WCA** = Wind Correction Angle
@@ -1452,6 +1451,7 @@
 
 #### Key Terms
 
+- **W** — Weight — force due to gravity acting on the aircraft (W = m × g)
 - **MH** = Magnetic Heading
 - **TH** = True Heading
 - **VAR** = Magnetic Variation
@@ -1512,8 +1512,8 @@
 #### Key Terms
 
 - **AMSL** = Above Mean Sea Level
-- **FL** = Flight Level
 - **QNH** = Pressure adjusted to mean sea level
+- **FL** = Flight Level
 ### Q83: A friend departs from France on 6 June (summer time) at 1000 UTC for a cross-country flight toward the Jura. You want to take off from Les Eplatures at the same time. What does your watch show? ^t60q83
 
 [DE](../SPL%20Exam%20Questions%20DE/60%20-%20Navigation.md#^t60q83) · [FR](../SPL%20Exam%20Questions%20FR/60%20-%20Navigation.md#^t60q83)
@@ -1998,8 +1998,8 @@
 
 #### Key Terms
 
-- **VHF** = Very High Frequency
 - **D** — Drag
+- **VHF** = Very High Frequency
 ### Q105: What does the term "agonic line" mean? ^t60q105
 
 [DE](../SPL%20Exam%20Questions%20DE/60%20-%20Navigation.md#^t60q105) · [FR](../SPL%20Exam%20Questions%20FR/60%20-%20Navigation.md#^t60q105)
@@ -2503,8 +2503,8 @@
 
 #### Key Terms
 
-- **AGL** = Above Ground Level
 - **AMSL** = Above Mean Sea Level
+- **AGL** = Above Ground Level
 ### Q128: On a map, 4 cm correspond to 10 km. What is the scale? ^t60q128
 
 [DE](../SPL%20Exam%20Questions%20DE/60%20-%20Navigation.md#^t60q128) · [FR](../SPL%20Exam%20Questions%20FR/60%20-%20Navigation.md#^t60q128)
@@ -2550,10 +2550,10 @@
 
 #### Key Terms
 
-- **AGL** = Above Ground Level
 - **AMSL** = Above Mean Sea Level
-- **CTR** = Control Zone
+- **AGL** = Above Ground Level
 - **FL** = Flight Level
+- **CTR** = Control Zone
 ### Q130: You are above Fraubrunnen (north of Bern-Belp airport), N47°05'/E007°32', at 4500 ft AMSL. Your height above the ground is approximately 3000 ft. In which airspace are you? ^t60q130
 
 [DE](../SPL%20Exam%20Questions%20DE/60%20-%20Navigation.md#^t60q130) · [FR](../SPL%20Exam%20Questions%20FR/60%20-%20Navigation.md#^t60q130)
@@ -2647,8 +2647,8 @@
 
 #### Key Terms
 
-- **NM** = Nautical Mile(s)
 - **D** — Drag
+- **NM** = Nautical Mile(s)
 ### Q134: Which statement about GPS is correct? ^t60q134
 
 [DE](../SPL%20Exam%20Questions%20DE/60%20-%20Navigation.md#^t60q134) · [FR](../SPL%20Exam%20Questions%20FR/60%20-%20Navigation.md#^t60q134)
@@ -2783,8 +2783,8 @@
 
 #### Key Terms
 
-- **AGL** = Above Ground Level
 - **AMSL** = Above Mean Sea Level
+- **AGL** = Above Ground Level
 - **TMA** = Terminal Manoeuvring Area
 ### Q140: What is the name of the location at coordinates 46°29' N / 007°15' E? ^t60q140
 
@@ -2874,9 +2874,9 @@
 
 #### Key Terms
 
-- **FL** = Flight Level
-- **ISA** = International Standard Atmosphere
 - **QNH** = Pressure adjusted to mean sea level
+- **ISA** = International Standard Atmosphere
+- **FL** = Flight Level
 ### Q144: An aircraft flies at a pressure altitude of 7000 ft with OAT +11°C. The QNH altitude is 6500 ft. The true altitude equals ^t60q144
 
 [DE](../SPL%20Exam%20Questions%20DE/60%20-%20Navigation.md#^t60q144) · [FR](../SPL%20Exam%20Questions%20FR/60%20-%20Navigation.md#^t60q144)
@@ -2899,8 +2899,8 @@
 
 #### Key Terms
 
-- **ISA** = International Standard Atmosphere
 - **QNH** = Pressure adjusted to mean sea level
+- **ISA** = International Standard Atmosphere
 - **OAT** — Outside Air Temperature
 - **D** — Drag
 ### Q145: An aircraft flies at a pressure altitude of 7000 ft with OAT +21°C. The QNH altitude is 6500 ft. The true altitude equals ^t60q145
@@ -2924,8 +2924,8 @@
 
 #### Key Terms
 
-- **ISA** = International Standard Atmosphere
 - **QNH** = Pressure adjusted to mean sea level
+- **ISA** = International Standard Atmosphere
 ### Q146: Given: True course: 255°. TAS: 100 kt. Wind: 200°/10 kt. The true heading equals ^t60q146
 
 [DE](../SPL%20Exam%20Questions%20DE/60%20-%20Navigation.md#^t60q146) · [FR](../SPL%20Exam%20Questions%20FR/60%20-%20Navigation.md#^t60q146)
@@ -2999,8 +2999,8 @@
 
 #### Key Terms
 
-- **GS** = Ground Speed
 - **TAS** = True Airspeed
+- **GS** = Ground Speed
 - **TC** = True Course
 ### Q149: Given: True course: 120°. TAS: 120 kt. Wind: 150°/12 kt. The WCA equals ^t60q149
 
@@ -3194,9 +3194,9 @@
 
 #### Key Terms
 
+- **TAS** = True Airspeed
 - **GS** = Ground Speed
 - **NM** = Nautical Mile(s)
-- **TAS** = True Airspeed
 ### Q157: Given: GS 160 kt, TC 177°, wind vector 140°/20 kt. The true heading (TH) equals ^t60q157
 
 [DE](../SPL%20Exam%20Questions%20DE/60%20-%20Navigation.md#^t60q157) · [FR](../SPL%20Exam%20Questions%20FR/60%20-%20Navigation.md#^t60q157)
@@ -3272,9 +3272,9 @@
 
 #### Key Terms
 
+- **TAS** = True Airspeed
 - **GS** = Ground Speed
 - **NM** = Nautical Mile(s)
-- **TAS** = True Airspeed
 - **TC** = True Course
 ### Q160: When using GPS for tracking to the next waypoint, a deviation bar with dots is displayed. Which interpretation is correct? ^t60q160
 
@@ -3348,10 +3348,10 @@
 
 #### Key Terms
 
-- **GS** = Ground Speed
-- **NM** = Nautical Mile(s)
 - **TAS** = True Airspeed
+- **GS** = Ground Speed
 - **D** — Drag
+- **NM** = Nautical Mile(s)
 ### Q163: Given: True course: 270°. TAS: 100 kt. Wind: 090°/25 kt. Distance: 100 NM. The flight time equals ^t60q163
 
 [DE](../SPL%20Exam%20Questions%20DE/60%20-%20Navigation.md#^t60q163) · [FR](../SPL%20Exam%20Questions%20FR/60%20-%20Navigation.md#^t60q163)
@@ -3376,8 +3376,8 @@
 #### Key Terms
 
 - **GS** = Ground Speed
-- **NM** = Nautical Mile(s)
 - **TAS** = True Airspeed
+- **NM** = Nautical Mile(s)
 - **TC** = True Course
 ### Q164: Which answer completes the flight plan (marked cells)? (3,00 P.) ^t60q164
 
@@ -3576,8 +3576,8 @@
 
 #### Key Terms
 
-- **NM** = Nautical Mile(s)
 - **D** — Drag
+- **NM** = Nautical Mile(s)
 ### Q172: What does the term terrestrial navigation mean? ^t60q172
 
 [DE](../SPL%20Exam%20Questions%20DE/60%20-%20Navigation.md#^t60q172) · [FR](../SPL%20Exam%20Questions%20FR/60%20-%20Navigation.md#^t60q172)

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