the missile as a portable thermal sight. Infantry personnel are no longer required to stay in constant contact with armored personnel carriers and tanks with thermal sights. This makes them more flexible and able to perceive threats they would not otherwise be able to detect. In 2006, a contract was awarded to Toyon Research Corporation to begin development of an upgrade to the CLU enabling the transmission of target image and GPS location data to other units. Day field of view The first view is a 4× magnification day view. It is mainly used to scan areas in visible light during daylight operation. It is also used to scan immediately before sunrise and after sunset, when it is difficult to focus the thermal image due to the natural rapid heating or cooling of the environment. Wide field of view The second view is the 4× magnification night view, a wide field of view (WFOV) which shows the gunner a thermal representation of the area viewed. This is also the primary view used due to its ability to detect infrared radiation and find both troops and vehicles otherwise too well hidden to detect. The screen shows a "green scale" view which can be adjusted in both contrast and brightness. The inside of the CLU is cooled by a small refrigeration unit attached to the sight. This greatly increases the sensitivity of the thermal imaging capability since the temperature inside the sight is much lower than that of the objects it detects. Due to the sensitivity this causes, the gunner is able to "focus" the CLU to show a detailed image of the area being viewed by showing temperature differences of only a few degrees. The gunner operates this view with the use of two hand stations similar to the control stick found in modern cockpits. It is from this view that the gunner focuses the image and determines the area that gives the best heat signature on which to lock the missile. Narrow field of view The third field of view is a 12× thermal sight used to better identify the target vehicle. Once the CLU has been focused in WFOV, the gunner may switch to a narrow field of view (NFOV) for target recognition before activating the seeker FOV. Once the best target area is chosen, the gunner presses one of the two triggers and is automatically switched to the