Altimeter Setting Procedures

Question 1

How is height expressed/reported when flying in the Standard Pressure Region?

Answer 1

Use the term Flight Level (FL)
Example: FL250 represents an altimiter indication of 25 000ft ASL
FL050 represents an altimeter indication of 5000ft ASL

Question 2

When flying in the Altimeter Setting Region, what is the departure procedures? How accurate does an altimeter need to be for an IFR flight?

Answer 2

Prior to takeoff, set the altimeter to either the current setting of that aerodrome or, if one isnt available, to the elevation of that aerodrome.

An altimeter needs to be accurate to within +/- 50 feet for an IFR flight

Question 3

When flying in the Altimeter Setting Region, what is the en route procedure?

Answer 3

• The altimeter shall be set to the current altimeter setting of the nearest station along the route of flight

OR

• If such stations are more than 150NM apart, then the nearest station/airport to the ROUTE of flight

Question 4

In the Altimeter Setting Region, what is the arrival procedure?

Answer 4

When approaching the aerodrome of intended landing, the altimeter shall be set to the current setting for that aerodrome, if availible.

Question 5

For how long is an altimeter setting reading/publication valid/current?

Answer 5

It is considered current for up to 90 minutes

Question 6

An altimeter setting is valid for 90 minutes but in what two scenarios should care be exercised?

Answer 6

When the altimere setting is older than 60 minutes or when pressure has been reported as falling rapidly

Question 7

An altimeter setting that is too high is going to read ___ _____
An altimeter setting that is too low is going to read ___ ___

Answer 7

Too high
Too low

Question 8

In a situation where the altimeter setting is within the 90 min validity periode, but the pressure has been reported to be falling rapidly…IF you have an idea of how much it has been dropping hour by hour, what rule of thumb can you use to make a rough calculation of the current altimeter reading?

Answer 8

Take your Decision Hight (DH) / Minimum Descent Altitude (MDA) and add 10ft for every 0.01 inches of mercury the pressure has dropped

** Remember to factore in where you are and how long it will take to get to your dest/arrival time

Question 9

When an authorized remote altimeter setting is used on an approach plate, how do you calculate the altitude correction?

Answer 9

There will be a specific correction to use on the approach plate

Question 10

Where is the Standard Pressure Region and what altimeter setting should you use?

Answer 10

The SPA is found at or above 18 000ft ASL (FL180) over SDA and in all of NDA.

Your altimeter will be set to 29.92 inches of mercury (1013.2 mb)

Question 11

Flight Levels (FL) are expressed in feet above…

Answer 11

Sea level

Question 12

What is 29.92 inches of mercury expressed in millibars?

Answer 12

1013.2 mb

Question 13

In the Standard Pressure Region, prior to takeoff, what shall the PIC set the altimeter to?

Answer 13

The current altimeter setting of the aerodrome or, if that isnt availible, to the elevation of the aerodrome

Question 14

1) After taking off in the Standard Pressure Region, when do you set the altimeter to 29.92?

2) If the flight is to be conducted above FL180, when should you set the altimeter to 29.92?

Answer 14

1) Imediately prior to reaching the flight level at which the flight is to be conducted

2) Reset the altimete to 29.92 AT FL180

Question 15

Just before descending to land in the Standard Pressure Region, the altimeter shall be set to…

Answer 15

…the current altimeter setting of the aerodrome, if available.

Question 16

In the Standard Pressure Region, before you descend to land and you suspect or know a hold is coming, when do you set your altimeter to the aerodrome setting?

Answer 16

Set it immediately prior to descent below the lowest flight level at which the hold is at.

Question 17

Provided no holds are coming, aircraft descending from cruising flight above FL180 in the Standard Pressure Region should reset their altimeters to the current aerodrome setting when…

Answer 17

…approaching FL180 ( always reset altimeters on the SPA side or, if you’re in NDA, all of which is SPA, always reset on the FL180 side)

Question 18

Unless otherwise authorized by ATC, when should aircraft going from one altimeter setting region to another reset their altimeters?

Answer 18

Always make the change on the Standard Pressure Region side

Question 19

Just before descending into the ASR, where does the pilot usually get the apropriate altimeter setting?

Answer 19

Normally the appropriate altimeter setting will be part of the ATC clearance prior to descent.

If it is not incorporated into the clearance, the pilot should request it