TM 1-1520-238-10 4-40 Change 3 Table 4-12. ORT and Hand Controls/Display Functions – continued Control/ Display Function Position Right Hand Grip (cont) FLIR PLRT Allows switching of FLIR polarities: black or white hot. VID RCD Starts or stops the video recorder when the VRS is in REC or PLAY mode. HDD Turns off heads out display and turns on heads down display. LRF/D trigger Two-position guarded trigger. The first detent will fire a ranging burst and stop. If continuous range or designation is desired, press trigger to second detent. Boresight Enable Up Enables the IAT during TADS internal boresighting or enables the AZ and EL pots during TADS outfront boresight. Center Disables all functions. Down Enables DVO boresight adjust switch. DVO adjust Three position, center maintain switch. Used to slew the DVO boresight adjustment in a helical motion. 4.24 TARGET ACQUISITION DESIGNATION SIGHT (TADS) AN/ASQ-170. WARNING If the pilot commands TADS away from the CPG, the CPGs sight defaults to IHADSS. The gun can still be fired with- out re–actioning, once the sight has changed. The TADS provides the CPG with day and night target ac- quisition by means of a direct view optical (DVO) tele- scope, a day television (DTV), and a forward looking in- frared (FLIR) sensor system. The sensors may be used singly, or in combination, depending on the tactical, weather, and visibility conditions. Target tracking may be accomplished manually; automatically, using the image auto-tracker (IAT); or by using the laser spot tracker (LT). The laser spot tracker facilitates target handoff from another laser designator. Linear motion compensation (LMC) aids in the tracking of moving targets either manu- ally or automatically. The image auto-tracker has the ca- pability to offset track one target, while automatically tracking another target. The TADS receives 115 vac pow- er from the No. 1 essential ac bus and 28 vdc power from the No. 1 essential dc bus and is protected by the TADS AC and TADS DC circuit breakers located on the CPG cir- cuit breaker panel. The TADS is continuously monitored by FD/LS; on-command test (test 14-TADS) will fault iso- late to the LRU. The Optically Improved (OI) configuration TADS contains special optical filters which provide laser threat protection in the FLIR and Direct View Optics (DVO) modes of operation. 4.24.1 OI Configuration. The OI configuration Night Sensor Assembly (NSA) contains selectable filters which will block different laser wavelength bands. These filters prevent lasers which operate in these bands from jam- ming the FLIR video (causing it to ‘‘bloom’’) should the la- sers be directed at the TADS. The OI configuration ORT FLTR SEL switch is used to select one of four possible fil- ter types: (a) the CLEAR filter is used for normal operation and provides no laser threat protection; (b) the S (for short) filter provides protection against lasers operating in the short wavelength band; (c) the L (for long) filter pro- vides protection against lasers operating in the long wave- length band; and (d) the MAX filter provides protection against lasers operating in both the S (short) and L (long) wavelength band. a. OI Special Filter Coatings. Special filter coat- ings are applicable to Direct View Optics lenses contained in the OI configuration Day Sensor Assembly. These filter coatings provide the CPG with eye protection against cer- tain laser threats should the CPG happen to view those laser threats through the DVO. Because the filters are coatings applied to fixed optics, they are always in place and require no action on the part of the CPG to activate.