Sentry

A Sentry is a floating robot which patrols the area of the CloudRunner Fortress. It appears throughout the entire fortress and will send a beam of electricity towards Fox if he gets spotted by one. The only effective way to really avoid it is to use the SharpClaw Disguise, which leads to it thinking of Fox as a fellow SharpClaw and thereof leave Fox alone. Even though Fox can't defeat the sentries, he can temporarily disable them by using the Fire Blaster.