Abstract: A search and surveillance system is describes in which two separate devices, typically a searchlight and an infrared and/or video camera, can be directly linked electronically through one device's comparator, without inclusion of an intermediate coordinating device, so that a user's movement and positioning of one of the devices directly determines the movement and positioning of the other device. Either of the devices may be the master unit, although in most cases the searchlight will be the master unit. The invention allows the user to concentrate on monitoring the operation of the master unit with the slave unit automatically responding in unison. The system is primarily used on aircraft, especially helicopters. Preferred methods of use of the system are also disclosed. The system uniquely utilizes comparator circuitry already found in conventional gimbal/unit positioning devices.