What is "sortieing"

Usage examples of "sortieing".

Hounded by a flotilla of Krivak II frigates sortieing from Arkhangelsk and by flights of Ka-27 Helix-A ASW helicopters from air stations ashore, it was forced to the surface after a three-hour chase that pinned it against the coast in shallow water, then sunk by torpedoes fired from the Kynda-class cruiser Groznyy.

Others were swinging right and left, lugging machine guns and portable gatlings, setting up blocking positions to prevent the intact bunkers from sortieing and closing the quarter-arc wedge the Helots had driven into the north face of the mine's defenses.

The Soviets were sortieing their ballistic missile submarines at intervals of one sub every four hours.