Kollmorgen type 76 periscope
Jolly Roger

Source: World Naval Weapons Systems.

Kollmorgen's (a U.S. company) 7.5in model 76 export periscope, which is installed on the Dutch Walrus class,  is made in both search and attack versions.

Walrus (2)'s control room. At the left-back the helmsman, in the middle the search scope  and at the right the sonar consoles (Photo:   CAVDKM/Keesnan Dogger).
Walrus (2)'s control room. At the left-back the helmsman, in the middle the search scope  and at the right the sonar consoles (Photo: CAVDKM/Keesnan Dogger).

Both versions both have binocular eyepieces with split LOS-stabilized optics. Magnification: 1.5x and 6x (FOVs 32 and 8 deg); elevation limits are +74/-10 deg in the attack version and +60/-10 deg in the search version. Both versions carry stadimeters, transmitting range electronically to the PCS. The attack version carries a broad-band RWR with a display on the control unit of the periscope. The search version can carry a sextant, LF communications antennas, a satellite navigation antenna, and an ESM early-warning antenna. Optional features include a 12 X telescope, power rotation, and a television camera feeding a remote unit (carrying a 9in CRT).

Kollmorgen's intensifier is mounted in the mast, rotating 90 deg toKollmorgen type 76 enter the main optical path of the periscope. The company's 8-12-micron SPRITE (12/4-deg FOV, 0.2-mrad beam-width) can be mounted between the optical head and the ESM antennas. Kollmorgen offers a television stadimeter (with automatic range computation if target masthead height is dialled in). The alternative radar ranger uses a slotted-waveguide antenna below the optical window. The laser ranger is mounted in the base of the periscope, opposite the viewing optics, with a swinging mirror (as in a single-lens reflex camera) to bring its beam into the main optical path. A sextant uses the periscope synchro to read off its line of elevation from the deck plane, the target-bearing transmitter to measure the target's direction relative to the submarine, and a built-in vertical reference to determine tilt and cross-tilt angles so that the sextant can measure star altitudes relative to the true horizon. The corrected altitude angle, bearing angle, and time are displayed and printed.

India (Type 1500 Shishumar class), Israel (three Dolphins), Italy (two Salvatore Pelosi class [Model 322, with radar ranger], two Primo Longobardo class [Model 323, with laser ranger], second pair of Nazario Sauro class [Model 324]), Netherlands (four Walrus class), Sweden (three Nacken class), and Turkey (six Type 209/1200, four Type 209/1400 [Model 374]).


Minister De Grave takes a peak through the search periscope, Apr 6 2000. (Photo:  Defensie -  Hennie Keeris).
Ltz 2nd class Nico Booij , who has his birthday today and is on board for his commanders trainingat, at the attack periscope, Apr 5 2000.  (Photo:  Defensie -  Hennie Keeris).
Walrus (2)-class control room layout. Dolfijn(4)'s navigation/search (top) and attack (btm) periscope
Apr 2000 (Photo: Defensie - Hennie Keeris).


Source: World Naval Weapons Systems.







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