IFR Altitudes

Question 1

MEA:

The altitude for an en route segment that provides adequate ________ of relevant _________ facilities and ___ communications, complies with the _______ structure and provides the required _______ _______. On the Jeppesen chart this figure is shown in _______ next to the route.

Answer 1

The altitude for an en route segment that provides adequate reception of relevant navigation facilities and ATS communications, complies with the airspace structure and provides the required obstacle clearance. On the Jeppesen chart this figure is shown in maroon next to the route.

Question 2

MOCA:

MOCA is valid for a corridor extending __nm either side of the ____ ________, including a __nm radius beyond the __ defining the route segment. MOCA is provided in hundreds of feet, the lowest indicated being 2 000ft, and is based on a tolerance of _____ft above terrain and obstructions up to ______ft and ______ft above terrain and obstructions over ______ft, rounded up to the nearest 100ft. On the jeppesen en route chart this figure is indicated in _______ by a number in thousands and hundreds of feet followed by a capital letter “_”, next to the route.

Answer 2

MOCA is valid for a corridor extending 10nm either side of the route centreline, including a 10nm radius beyond the fix defining the route segment. MOCA is provided in hundreds of feet, the lowest indicated being 2 000ft, and is based on a tolerance of 1500ft above terrain and obstructions up to 5 000ft and 2 000ft above terrain and obstructions over 5000ft, rounded up to the nearest 100ft. On the jeppesen en route chart this figure is indicated in maroon by a number in thousands and hundreds of feet followed by a capital letter “T”, next to the route. For example 6000T.

Question 3

MORA:

This is an altitude derived by Jeppesen. The MORA provides known obstruction clearance __nm either side of the route centreline including __nm radius beyond the radio fix, reporting or milage break defining the route segment. For terrain and man-made structure clearance refer to grid MORA. When indicated on the Jeppesen en route chart, the figure appears in _______ with the letter “_”.

Answer 3

This is an altitude derived by Jeppesen. The MORA provides known obstruction clearance 10nm either side of the route centreline including 10nm radius beyond the radio fix, reporting or milage break defining the route segment. For terrain and man-made structure clearance refer to grid MORA. When indicated on the Jeppesen en route chart, the figure appears in maroon with the letter “a”.

Question 4

The lowest altitude at certain fixes at which an aircraft must cross when proceeding in the direction of a higher minimum en-route altitude -

Answer 4

Minimum Crossing Altitude

Question 5

RVSM:

RVSM is a term used to describe the reduction of the standard vertical separation required between aircraft flying at levels between FL ___ and FL ___ from _____ft to _____ ft. The purpose, therefor, increases the number of aircraft that can safely fly in a particular volume of airspace. Historically, standard vertical separation was 1 000ft from the surface to FL 290, 2 000 feet from FL 290 to FL 410 and 4 000 feet above this. This was because the accuracy of the pressure altimeter decreases with height. Over time, air data computers combined with altimeters have become more accurate and autopilots more adept at maintaining a set level; therefor, it became apparent that for many modern aircraft, the 2 000ft separation was not required. it was therefor proposed by ICAO that this be reduced to 1 000 feet.

Answer 5

RVSM is a term used to describe the reduction of the standard vertical separation required between aircraft flying at levels between FL 290 and FL 410 from 2 000ft to 1000 feet. The purpose, therefor, increases the number of aircraft that can safely fly in a particular volume of airspace. Historically, standard vertical separation was 1 000ft from the surface to FL 290, 2 000 feet from FL 290 to FL 410 and 4 000 feet above this. This was because the accuracy of the pressure altimeter decreases with height. Over time, air data computers combined with altimeters have become more accurate and autopilots more adept at maintaining a set level; therefor, it became apparent that for many modern aircraft, the 2 000ft separation was not required. it was therefor proposed by ICAO that this be reduced to 1 000 feet.