What size SCBA bottles are primarily used by Navy investigators?

The 30-minute SCBA bottles are primarily used by Navy investigators due to their balance of size, weight, and duration of air supply. This size allows for adequate air supply while remaining manageable for the user during investigations or emergency situations.

This selection is particularly effective for scenarios common in naval operations, where the need for mobility is essential, and a longer duration of air supply beyond what the 30-minute bottle offers is typically unnecessary for the tasks performed. The 30-minute SCBA is lightweight enough to ensure the investigator can move comfortably, yet it provides sufficient breathing time for various investigative activities, making it a practical choice for the Navy.