General 7 Altimetry Flashcards

1
Q

What are the notified units of measurements of pressure for the UK?

A

Hectopascals

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2
Q

When set to QNH, what is the altimeter showing?

A

Altitude

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3
Q

When set to QFE, what is the altimeter showing?

A

Height above airfield elevation (or the reference datum)

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4
Q

Describe the RPS

A

Regional Pressure Setting

The lowest forecast QNH value within an Altimeter Setting Region

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5
Q

Define Transition Altitude

A

The altitude at or below which the vertical position of an aircraft is controlled by reference to altitude.

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6
Q

Define Transition Level

A

The lowest Flight Level available for use above the transition altitude, separated from the TA by at least 1000ft.

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7
Q

Define Transition Layer

A

The airspace between the Transition Altitude and the Transition Level

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8
Q

Unless otherwise notified, what is the UK Transition Altitude?

A

3000ft

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9
Q

How is the transition level determined inside and outside of controlled airspace?

A

Inside CAS - By the controlling authority based on a major aerodrome QNH
Outside CAS - By the aerodrome operator based on local QNH

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10
Q

When is the ATCO required to state the units (hPa) of the pressure setting?

A

When the pressure is lower than 1000hPa

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11
Q

What is aerodrome elevation based on and when is a separate elevation given?

A

The highest point of the landing area

A separate elevation is given for the threshold of Precision Approach RWYs or if the threshold is 7ft or more below AD elevation

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12
Q

How close to the CAS boundary can an ATCO descend an aircraft?

A

500ft

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