Presolicitation notice from the Department of Defense, specifically the Department of the Navy, is seeking to procure inertial navigation and other replacement parts. These navigational instruments, specifically NSN 7R-6605-016815928-BL with reference number 812700-1600, are used for navigation purposes. The procurement is for a quantity of 3 each, with delivery FOB origin. For more information, contact Peter A. Kobryn at N761.17, phone (215)697-4313, or email PETER.KOBRYN@NAVY.MIL.