What is the Climb Gradient, why is it so important and how do you find the information about the minimum Climb Gradient required?

By definition, the Climb Gradient is the ratio between the distance traveled over the ground and the altitude gained expressed in percentage.

Every SID (Standard Instrument Departure) and every Missed Approach have a minimum climb gradient.

You have a minimum Climb Gradient on your departure procedure because you need to be separated by the obstacles and, in order to get this separation, you need to maintain a minimum rate of climb that varies from departure to departure depending on the terrain.

The same applies to the missed approach since you will execute the go-around at your minima which is, normally, closed to the ground.

So, once you know the minimum climb gradient of the procedure and, your aircraft climb gradient you will be able to figure it out if you can fly that particular procedure.

For example, if your Departure minimum climb gradient is 10% and your aircraft gradient is 5% this means that you are not capable to fly this Standard Instrument Departure.

A gradient of climb of 100% means that for every 100m of a horizontal distance you climb 100m, a 50% gradient means that for every 100m you climb 50m, and so on.

At the bottom of the graphic section of the SID chart, you find the Minimum Climb Gradient requirements expressed in percentage and in feet per Nautical Miles.

Next to it, you will be able to find out, depending on your climb Ground Speed, which rate of climb you have to maintain in order to comply with the minimum gradient.

On the approach chart, you will find the minimum missed approach climb gradient on the Decision Altitude table.

You then need to check on your aircraft tables if, depending on the weather and aircraft conditions, you can comply with the minimum climb gradient.

If you want to know more about Standard Instrument Departure watch the following video:
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If you want to see the video about the Approach chart watch the following:
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If don't know what the DME is, watch the following:
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Disclaimer:
THIS VIDEO IS FOR ENTERTAINMENT PURPOSES ONLY.
NOT FOR REAL-LIFE OPERATIONS.
PLEASE REFER TO THE OFFICIAL MANUAL AND DOCUMENTATION.
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