crest clearance

Medium shells sounding like express trains, passed over us with plenty of crest clearance.

Where appropriate, shore bombardment in direct, beacon and dead reckoning modes, including crest clearance, is available.

The battalion’s supporting artillery had to cease firing when the leading rifle platoons began to incur casualties from supporting rounds falling short, because of crest clearance difficulties.

Dug-in to the east, 16 RNZA had been forced to fire with minimum crest clearance over the Australian lines in order to bring effective fire to bear on the assaulting Chinese from their 25-pounders.

In 1882, Russian Lieutenant Colonel KG Guk published Indirect Fire for Field Artillery, which provided a practical method of using aiming points for indirect fire by describing, "all the essentials of aiming points, crest clearance, and corrections to fire by an observer".