OVERVIEW: The S 320 Narhvalen [Modified Type 205] is a diesel-electric submarine operated by the Royal Danish Navy. Commissioned in 1985, the *Narhvalen* represents a locally enhanced variant of the German Type 205 design, adapted to meet specific Danish operational requirements within the Baltic and North Sea environments.

DETAILS: The Type 205 submarine was originally developed in West Germany during the Cold War to provide a compact and highly maneuverable platform for operations in shallow, confined waters. The Danish *Narhvalen* incorporates several modifications from the baseline Type 205, reflecting advances in submarine technology and Danish naval doctrine in the 1980s. These modifications likely included improvements to the boat's sonar suite, internal arrangements, and potentially the integration of more advanced fire control systems. The design emphasis remained on quiet operation and a small acoustic signature to enhance survivability in littoral environments, a critical factor given the Soviet submarine threat in the Baltic. The *Narhvalen*'s relatively small size also contributed to its agility and made it challenging to detect in the complex acoustic environment of the Baltic Sea.

The primary roles of the *Narhvalen* were anti-submarine warfare (ASW) and anti-surface warfare (ASuW), with a secondary capability for intelligence gathering and surveillance. The submarine's 533mm torpedo tubes provided a potent offensive capability against both surface combatants and enemy submarines. The installation of the THD 1030 Calypso II surface search radar allows for the detection and tracking of surface contacts, even in adverse weather conditions. The DUUG 1A passive sonar system allows the *Narhvalen* to detect and classify underwater targets at extended ranges, while the DR 2000U radar intercept receiver provides the capability to detect and analyze enemy radar emissions, enhancing situational awareness and providing early warning of potential threats. The AN 407 minehunting sonar would have contributed to the platforms ASW capabilities when deployed to the confined Baltic sea during the cold war.

The *Narhvalen*'s sensor suite represents a blend of active and passive detection systems, optimized for the demanding operational environment of the Baltic Sea. The integration of both optical and low-light television (LLTV) submarine periscopes further enhances the submarine's ability to conduct visual surveillance and target identification, particularly in shallow waters where sonar performance can be degraded. The M1H sonar provides an additional layer of acoustic detection capability. The combined effect of these sensors and weapons provided the Royal Danish Navy with a significant underwater warfare capability during its service life.

SPECIFICATION: Length: 44.0 m || Beam: 4.55 m || Draft: 3.98 m || Disp: 435 t

SENSORS: M1H || THD 1030 Calypso II || DUUG 1A || DR 2000U || AN 407 || Generic Submarine Periscope, Optical || Generic Submarine Periscope, LLTV

ARMAMENT: 533mm TT