Some Tomcats were specially configured as a test airframe for new avionica, weapons, databases, wiring and so on. In the Naval designation system, test airframes receive the letter N in front of the basic type. The NF-14Ds were based at NAS point Mugu (CA) and assigned to the Naval Weapons Test Squadron Point Mugu (NWTSPM). This unit was redesignated to Naval Air Warfare Center Weapons Division (NAWCWD). This Tomcat shows the NAWCWD title on the leading edge, as well as the old Weapons Test Squadron on the tail.