Terrain Critical Routes

Question 1

(EXHIBIT 6) Identify the altitudes in box A on the New York Low Enroute chart.
(GOM, Ch 1)

Answer 1

A. MEA of 5000’ (minimum en-route altitude; lowest altitude meeting terrain, signal and ATC clearance requirements) and MOCA of 1600’ (minimum obstruction clearance altitude; lowest altitude between fixes that provides obstacle clearance and signal coverage if within 22nm of a VOR)

Question 2

(EXHIBIT 6) Identify the altitude in box B on the New York Low Enroute chart.
(GOM, Ch 1)

Answer 2

B. GRID MORA of 3100’ (grid minimum off-route altitude; 1000’ obstacle clearance where peaks are 5000’ or lower, 2000’ obstacle clearance where peaks are 5001’ or higher)

Question 3

(EXHIBIT 6) What does “MAA” stand for in box C on the New York Low Enroute chart.
(GOM, Ch 1)

Answer 3

C. Maximum Authorized Alititude (maximum authorized altitude; maximum altitude suitable for navaid signal reception)

Question 4

On a Terminal Procedure, unless otherwise noted, what is the radius of protection of the MSA in reference to the charted fix. (GOM, Ch 1)

Answer 4

• Unless otherwise depicted, 25nm from the fix depicted in the MSA ring.

Question 5

(EXHIBIT 7) While on L626 between PALPA and SUKET you experience a rapid decompression, how low are you going to descend? When can you descend further?

Answer 5

• FL160 until SUKET and then 11500

Question 6

When may the Special Engine Failure Procedure be disregarded if an engine fails after V1?
(GOM, Ch 6)

Answer 6

• The Contingency Procedure is not mandatory for use in VMC. In the event of an engine failure in VMC, the flight crew may “see and avoid” obstacles.