OVERVIEW: The S 44 Shishumar [Type 209-1500] is a diesel-electric attack submarine (SSK) operated by the Indian Navy. It represents a significant upgrade over earlier Type 209 variants, incorporating advanced sensors and systems tailored to India's operational requirements in the Indian Ocean region.

DETAILS:
The Type 209-1500 design, developed by Howaldtswerke-Deutsche Werft (HDW) of Germany, represents the pinnacle of the Type 209 family. The Shishumar class, which includes S 44, was built under license in India at Mazagon Dock Limited (MDL) in Mumbai. The program was initiated in the early 1980s with technology transfer agreements. S 44 was commissioned in 2000, representing the culmination of the initial construction and technology absorption phase. The design emphasizes quiet operation, endurance, and a robust sensor suite for effective underwater operations. The Type 209's modular design facilitated the incorporation of updated technology during construction and allows for future modernization programs. The overall design philosophy prioritized anti-submarine warfare (ASW) and anti-surface warfare (ASuW) capabilities in littoral environments.

The primary roles of the Shishumar class are anti-submarine warfare (ASW), anti-surface warfare (ASuW), intelligence gathering, and covert operations. Its low acoustic signature allows it to operate effectively in contested waters, posing a credible threat to enemy submarines and surface combatants. The submarine's capabilities are particularly suited for patrol and interdiction missions within the Indian Ocean. The Shishumar class represents a core component of India's submarine force and contributes significantly to maritime security.

The sensor suite aboard S 44 is comprehensive. The TSM 2233 Eledone, a composite sonar array comprised of the DSUV 2H hull-mounted passive ranging array and DUUA 2D flank array, provides long-range detection and classification of underwater targets. The AR-672 Phoenix I radar offers surface search and navigation capabilities. The TRS 3110 Calypso IV radar, utilizing the DRUA 33 antenna, supplements surface surveillance and fire control functions. The TSM 2255 and TSM 2243 integrated combat management system processes sensor data and provides tactical recommendations. The OMS 100 / SERO 400 periscope suite enhances situational awareness and target identification. These sensors, coupled with its torpedo armament, allow the Shishumar to effectively prosecute both submarine and surface targets. A signal ejector provides means for deception and communications.

SPECIFICATION: Length: 64.4 m || Beam: 6.5 m || Draft: 6.2 m || Disp: 1660 t

SENSORS: TSM 2233 Eledone [DSUV 2H + DUUA 2D] || AR-672 Phoenix I || TRS 3110 Calypso IV [DRUA 33] || TSM 2255 || TSM 2243 || OMS 100 / SERO 400 Periscope Suite

ARMAMENT: 533mm TT || Signal Ejector