Jets could deploy off-base completely, or to sites on the periphery, taking off from taxiways and roads.
Most of the solutions people have offered have been wildly off-base.
Many of the solutions they proposed were wildly off-base.
The student's main point about the language of the speech was true, but the comment about the election was completely off-base.
Much explanation has come to light to show that such a conclusion of malfeasance is off-base.
Your claim that the left lacks moral principles is absolutely off-base.
The whole fat-exec-who-doesn't-deserve-to-be-there characterization is way off-base.
The base groundwater contamination does not pose a public health hazard to off-base residents.
The source of the contamination was an off-base dry cleaners.
The contamination was caused by both on- and off-base sources.
Word Origin and History for off-base
"unawares," 1936, American English, from off (adv.) + base (n.); a figurative extension from baseball sense of "not in the right position" (1898), from notion of a baserunner being picked off while taking a lead.