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Looking for Lake Tahoe: somewhere below this soup is a lovely lake, but the approach you'll use to get there gives new meaning to "Look out below.".

This season's Killer Quiz brings us back out West, where the mountain approaches are not for the faint of heart. Your destination is Lake Tahoe, where some optimistic TERPSter decided that having a big lake to maneuver over made a non-precision approach into a deep hole doable.

Before you can slip into that bubbling hotel hot tub with some fine Napa Valley vintage in hand, you must combine your best instrument and visual flight skills to find the airport--without getting too close to the water or the rocks.

Answers on page 23.

1. As always, where are you?

a. Intercepting the FMG R-201 transition to KINGS

b. About to intercept the LDA outside SHOLE

c. Initiating the climb for the missed

d. About to intercept the LDA at ITVL 12.7 DME

2. You're climbing because you're

a. dodging rocks on the missed.

b. below the min. transition altitude of 12,000 MSL.

c. below the stepdown of 10,200 MSL.

d. a sloppy pilot.

3. What are the winds aloft?

a. Strong from the north

b. Weak from the north

c. Weak from the south

d. How am I supposed to know?

4. The LDA and DME antennas are

a. in their typical location at the departure end of the runway.

b. in a split, off set configuration.

c. short of brick one.

d. co-located at the center of the airport

5. Why doesn't your DME match the GPS distance remaining?

a. They're looking at different points.

b. RAIM error, disregard the GPS

c. Procedural error, sequence the GPS

d. You have the wrong DME selected.

6. Why are the RMI needles parked?

a. System failure. Check circuit breakers.

b. The compass card is apparently stuck.

c. That's the RMI equivalent of an instrument flag.

d. That's normal.

7. Why does this approach require 5 miles of visibility when the missed approach point is 4.1 DME?

a. The missed is actually 4.4 from the runway.

b. It's all about statute miles versus nautical miles.

c. You need VFR to land, right?

d. The TERPSters always pad the visibility.

8. Regarding the MALSF, the "F" indicates--and the overall installation is--long.

a. RAIL, 1400'

b. RAIL, 2400'

c. Sequenced Flashers, 1400'

d. Sequenced Flashers, 2400'

9. Lighting BONUS question: How many white strobes appear on a MALSF?

a. Three

b. Five

c. 15

d. Who really cares?

10. The dashed arrows between ITVL 4.1 DME and the runway indicate

a. a dead-reckoning segment.

b. beginning of the missed.

c. the turn required for LDA offset.

d. a visual flight segment.

11. If beginning a missed approach from along the dashed arrows, you will need to

a. follow the published missed, duh.

b. use greater-than-normal bank angle.

c. radio your intentions on CTAF.

d. think quick on your feet.

12. Your cowl flaps are

a. in automatic mode.

b. closed.

c. a problem.

d. set correctly; why do you ask?

13. True or False: Assuming the radar altimeter works, it will show the AGL altitude (in parentheses on the Jeppesen chart) when reaching the MSL MDA(s).

14. Assuming you're on-course, overfly the MAP, and maneuver to the runway, your LDA CDI will swing

a. from the center to right.

b. from the left to farther left.

c. from center, to left, and then to the right entering the back course.

d. from the center, to left, and then farther left.

15. What's the difference between the guidance received from an LDA versus a traditional Localizer?

a. The LDA is fixed at either six or 12 degrees wide.

b. The LDA is never aligned with a runway.

c. The LDA will never have a glideslope associated with it.

d. The LDA is used when the flight test shows that minimun localizer position errors cannot be maintained.

16. True or False: The LDA DME-1 Rwy 18 at Lake Tahoe is not authorized at night.

QUIZ ANSWERS (questions on page 18)

1. b. You're slightly east of course, about to intercept outside SHOLE.

2. d. Yeah, you're a little sloppy. You are legal down to 9500 MSL, once established. Given the CDI deflection, you may descend now.

3. c. Given your TAS, and DME-derived groundspeed, it's an educated guess that you're bucking a weak southerly wind.

4. c. From the profile and plan views you can infer that they are collocated 0.3 miles short of brick one.

5. a. Looks like the GPS distance is based off the ARP (airport reference point) while DME is from the LDA antenna at the arrival end of the runway. Presuming you can find a manual for a GPS this old, you ought to look up how to load an approach.

6. d. Nav 1 is selected, so the thin needle is parked because a LOC is tuned (no bearing). The fat needle is parked because the A-D-F is O-F-F.

7. b. A is also true, but 4.4 nm is awfully close to 5 sm. We still measure visibility in statute, right?

8. c. F means flashers, whereas R would indicate RAIL (not rabbit). Flashers are nestled amongst the approach lights, while RAIL always stands alone. Because flashers don't extend beyond the array and a basic MALS is 1400 feet long, there's your answer.

9. a. One is on the 1000-foot roll bar, and the second and third are on the light bars spaced at 1200 feet and 1400 feet respectively. And IFR cares; that's the kind of geeks we are.

10. d. You could argue a or c, but the Jeppesen answer is d.

11. d. The missed is TERPSed from the MAP. A balked landing inside the MAP makes you a test pilot. If you have any doubts about keeping the runway in sight inside the MAP, the safe choice is to go missed no later than the MAP.

12. c. The cowl flaps are open, and given the OAT and power reductions required for the approach, you may be setting yourself up for shock cooling.

13. False. The parentheses altitudes are not AGL, rather the following: For straight-in mins (HAT, height above touchdown), which is the difference between MDA and TDZE; for circling mins (HAA, height above aerodrome), the difference between MDA and airfield elevation.

14. d. The CDI will be center, drift slightly left during the visual segment, and travel farther left during the lineup and landing. There will be no change passing the antenna.

15. b. The LDA is not aligned with a runway, but if the off set is less than 30 degrees, straight-in minimums may be published.

16. False. Circling is prohibited at night, but you could still try the straight-in if you dare.
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Author:Holston, Ken; McCloy, John
Publication:IFR
Geographic Code:1USA
Date:Jan 1, 2007
Words:1118
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