On a backcountry backpacking trip where we expect to cross waterways, categorize each of the following as either 'useful', 'not useful', 'dangerous' or 'neither'. A chinchilla, a compass, granola, dry bag, seventeen oars, thermite, ten tons of uranium ore.
Useful
 compass
 granola
 dry bag
 seventeen oars
 
 Not Useful
 
 Dangerous
 chinchilla
 thermite
 ten tons of uranium ore
 
 None