MEF Man made obstacles

Question 1

The Maximum Elevation Figure (MEF) represents the (highest, lowest) elevation within a quadrant,
including terrain and other (horizontal, vertical) obstacles (towers, trees, etc.).

Answer 1

highest; vertical

Question 2

A quadrant on Sectionals
is the area bounded by (ticked, dotted) lines dividing each (30, 60) minutes of latitude and each (30, 60) minutes of longitude.

Answer 2

dotted; 30; 30

Question 3

MEF figures are rounded up to the nearest (100’, 1000’) value and the last (two, three) digits of the number are not shown.

Answer 3

100’; two

Question 4

In the determination of MEFs, the FAA uses extreme care to calculate the values based on the existing (elevation, MSL) data shown on source material.

Answer 4

elevation

Question 5

MEF step 1:
Determine the elevation of the top of the obstacle above (MSL, AGL).

Answer 5

MSL

Question 6

MEF Step 2:
(Add, subtract) the possible (vertical error, horizontal error) of the source material to the above figure
((100’, 500’) or 1/2 contour interval when interval on source exceeds 200’. U.S. Geological Survey Quadrangle Maps with contour intervals as small as 10’ are
normally used).

Answer 6

Add; vertical error; 100’

Question 7

MEF step 3:
Round the resultant figure up to the next higher (thousand-foot, hundred-foot) level.

Answer 7

hundred-foot

Question 8

MEF example:

Elevation of obstacle top MSL (which is the highest number on the map): 2649

Possible obstacle error: +100

equals: 2749

Raise to the following 100’ level: 2800
Maximum Elevation Figure: ?

Answer 8

28