The MK46 Mod 1 Optical Sight System is a two-axis, gyro-stabilized sensor platform containing a high-performance color daylight imaging sensor, thermal imaging sensor and eye-safe laser rangefinder. The MK46 OSS is highly integrated into the MK34 gun weapon system, allowing the ship's primary gun system to use either radar or electro-optical target tracking and imaging data.
Kollmorgen Electro-Optical, with facilities in Massachusetts and Vermont, has been the sole supplier of MK46 OSS systems since 1990. Kollmorgen has also been the primary designer of all submarine periscopes used in the Navy since 1916.