Hovering anywhere from five to seven feet above the ground with the force of their gravity re-directors, hover-sentries quietly patrol night and day in almost complete silence.
Hover-sentries were extremely common prior to the Fall of mankind, employed widely as cheap but effective patrol units, security guards, and watchdogs for military, industrial, and even civilian facilities. Bases, factories, power plants, and even shopping malls often had small forces of hover-sentries to provide security when needed. No bigger than a small television set, entire troupes of these robots could remain in an unseen robot-bay or secret security center until needed.
When activated, they rise into the air with a hum, screens (revealing any built-in weaponry) slide open, and they move out to perform their duties. Like most robots, however, hover-sentries are relatively simple constructs, with only the most basic of programming; scan for intruders or unlawful trespassers, scan for ID cards (in military or industrial facilities), and generally keeping an eye out for the presence of weapons or known criminals in public places.
The typical hover-sentry robot will have a single ranged weapon system built into it; typical examples include a maser pistol, laser pistol Mk1, stun gun, or even a gauss SMG (with enough internal ammo to supply for 2-3 full reloads). Some are known to possess more than one weapon system (especially in military security areas).
Due to its auto-loading system, loading ammunition in any built-in weapon system is a free action for a hover-sentry.
Hover-sentries can only engage by using their built-in ranged weapons. Capable of hovering flight, they will generally rise out of the range of melee or hand-to-hand combat.
Programs typical of hover-sentries include alarm, detection, sentry, slave unit, task, and verbal response.