Notes - These charts provide a convenient means of determining the vertical fall in feet required to arm the various types of fuzes when the bomb is released in any combi-nation of dive angle and speed. The "air travel" for entering the charts is the actual dis-tance traveled by the bomb along the  trajectory. Values of air travel are given in the description of each fuze. Vertical fal required to arm is defined as the vertical distance between the point of release of the bomb and the point where the fuze becomes fully armed.

Procedure - With air travel for a given fuze enter the chart for the appropriate dive angle. Project air travel vertically to the curve corresponding to speed of aircraft and from there horizontally to intersect the vertical fall scale. This intersection gives the ver-tical fall required to arm the fuze.

Example:

Given:

From 30° chart:

In dives over 60 degrees, vertical fall may be considered as equal to air-arming travel.

These charts supersede BuOrd Sketch No. 120494.