Great list IR
- estimating the height of an object: a 4-inch stick (or multitool ruler) held at arms length creates an angle of roughly 10 degrees. At 25 feet, a 10° angle translates to 4 feet; at 50 feet, it becomes 8 feet; at 100 feet it's 16 feet, etc.
- measuring lengths of fuses to determine burn time
The real problem, then, is using the 8 or so inches of the multitool to measure out the 25, 50, or 100 feet reliably
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