Final answer:
Stacking off-loaded canisters on top of one another is considered a CAUTION in the Drill manual. Follow the guidelines provided in the manual to ensure safety and prevent potential hazards.
Step-by-step explanation:
Stacking off-loaded canisters on top of one another is considered a CAUTION in the Drill manual. This means that it is not recommended to do so. It is important to follow the guidelines provided in the manual to ensure safety and prevent any potential hazards.
In relation to the given excerpt, it states that lumps of fissile material should never be stacked together on a shelf, as there may be a danger or surprise that could occur.
By following the instructions and cautions provided in the Drill manual, we can maintain safety and reduce the risk of accidents or dangerous situations.