Photonics mast

Unlike a periscope, it needs not be located directly above its user, and it requires only a small pressure hull penetration for cabling.

A photonics mast operates by rising above the water in a manner similar to a telescoping antenna and provides information through an array of sensors, such as high-definition low-light and thermographic cameras.

Astute-class nuclear attack submarines are equipped with two Thales CM010 optronics mast similar in capabilities to the Sagem model in French use.

[4] The Elektropribor Central Research Institute has also developed the Parus-98 photonics mast for the conventional Lada-class submarines and the export market (Parus-98E).

In Virginia-class boats, traditional periscopes have been supplanted by two Photonics Masts that house color, high-resolution black and white, and infrared digital cameras atop telescoping arms.