This video discusses: Time & Descent Calculations (time, rate, distance), Glide Slope, Crossing Restrictions, and Rate of Descent (required during an approach, e.g. vertical speed required when established on an instrument approach). READ DETAILED DESCRIPTION BELOW:
By having two pieces of information, you can then deduce all of the other pieces of information by setting/finding the correct relationship almost instantly.
Minutes = Distance (in nautical miles) ÷ Speed Traveled (in nautical miles per minute)
Minutes = Altitude Change (in feet) ÷ Rate of Descent (in feet per minute)
Glide Slope = Rise (altitude change: in feet) ÷ Run (distance: in nautical miles)
Glide Slope = Rate of Descent (in feet per minute) ÷ Speed (in nautical miles per minute)
In “MINTES mode”, the outside bezel represents distance (either horizontal or vertical), while the inside bezel represents speed (either in nautical miles per minute, or feet per minute). Any value over the 10 placement will represent time (in minutes).
Accordingly, when set to “minutes mode”, the inside bezel can represent your speed being traveled (in the form of nautical miles per minute). In this setting, the outside bezel will then represent the distance (in nautical miles) you are away from something horizontally.
Furthermore, when set to “minutes mode”, the inside bezel can represent descent rate (in feet per minute). In this setting, the outside bezel will then represent the distance you are away from something vertically (e.g. altitude change).
When in “GLIDE SLOPE mode”, the outside bezel represents distance (vertical rise), or it can also represent rate of descent; while the inside bezel represents distance (horizontal), or it can represent rate of descent / vertical speed (in feet per minute).
Therefore, when set to “glide slope mode”, the inside bezel can represent the “run”, e.g. the distance you are away from something vertically. In this setting, the outside bezel represents the “rise”, e.g. the distance you are away from something horizontally.
Additionally, when set to “glide slope mode”, the inside bezel can represent the horizontal speed being traveled (groundspeed in nautical miles per minute). In this setting, the outside bezel then represents vertical speed (e.g. rate of descent) proportional to the glide slope that is se over the 10 placement.
Also, with the desired glide slope set up over the 10 placement, you can determine what altitude you should currently be at for any given distance, or vise versa, by simply noting the desired rise over run in comparison to your actual altitude or distance you are currently at. For example, for a 3˚ glide slope, you can find your distance (lets say 15 nautical miles away) and then quickly note the altitude you should be at (in this example, 4,500 feet).