The wall looks high enough to deter any interlopers, but we'd better have a couple of men on perimeter patrol, just to make sure.

"This is my report on perimeter patrol, as of oh six hundred hours."

He bet that the entire group had remained within a few kays of the mines-a perimeter patrol.

He finished his check with the perimeter patrols.

There were four of them now, flying a slow perimeter patrol.

"I'll bet she got perimeter patrols in the Helconya system."

Another plus is they'll be stopping earlier to set up camp so they can put out perimeter patrols.

Colm: maintain the perimeter patrols on this deck, double strength.

With one man missing, that left four to dig the trench, monitor the equipment, and set up a perimeter patrol.

Such things happened every day on perimeter patrol.