Artillery designed to shoot upward at airplanes.
1 This ack - ack was small beer by comparison, little more than a thin splatter.
2 Ng laughs sharply, like distant ack - ack , and the van almost swerves off the road.
3 Beyond the ack - ack , they heard artillery fire, their own, some way further to the west.
4 Janie with her clever hand on the ack - ack prototype.
5 Engine noise, like barrages from ack - ack guns, rattled back to us from the concrete walls.
6 And there's ack - ack fire from a plane overhead.
7 Is this an ack - ack station or is it a museum?)
8 It's the answering service!" And then Wyeth and his ack - ack windup cry-"Forgetit!" It comes out disgusted, like a slap.
9 Plasma shots rose up like ack - ack fire and turned four of them in a row into screaming torches while oily smoke billowed.
10 Pale puff-balls of bursting ack - ack fire mottled the sky to the northeast, heralding the arrival of a vast and heavily escorted formation of 88s.
11 His arms and his fists were like those old ack - ack guns, rat-a-tat-tat, slamming back and forth, blood flying everywheres, and he just kept charging.
12 Lots of ack - ack crews used boys as young as 12 for spotters, andall the kids developed uncannily keen ears for the sound of different motors.
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