WASHINGTON, March 7 (Reuters) - The U.S. State

Department has approved the potential sale to South Korea of

subsonic sea-skimming aerial targets and target drones for Aegis

class destroyers for an estimated cost of $170.6 million, the

Pentagon said on Thursday.

The principal contractor for the aerial targets will be

Kratos Defense and the principal contractor for the

target drones will be Northrop Grumman ( NOC ), the Pentagon

said.