OVERVIEW: The P 831 Sava is a submarine operated by the Montenegrin Navy, commissioned in 1992.

DETAILS:
The P 831 Sava likely represents a locally developed or acquired diesel-electric submarine design, originating from the period of the former Yugoslavia. Given its commissioning date, it’s plausible the vessel was initially intended for service with the Yugoslav Navy before Montenegro gained independence. The design philosophy likely emphasizes coastal defense and area denial capabilities within the Adriatic Sea, reflecting the strategic realities of the region. The focus would have been on silent operation in littoral environments, maximizing ambush opportunities against potential adversaries. Given the limited data, a derivation from a Soviet or Western design cannot be ruled out; further research is required to establish its lineage.

The primary role of the Sava is likely anti-surface warfare (ASuW) and anti-submarine warfare (ASW) in coastal waters. Given its sensor suite, secondary roles could include intelligence gathering and maritime surveillance, although the data doesn't indicate specific ELINT or SIGINT capabilities. The 533mm torpedo tubes provide a significant offensive punch against surface combatants and submarines. The vessel's shallow draft suggests an emphasis on operating in the relatively shallow waters of the Adriatic, making it difficult for larger, deep-diving submarines to effectively counter it. The age of the vessel would necessitate ongoing maintenance and upgrades to retain operational relevance in a modern naval environment.

The sensor suite aboard the Sava provides a blend of active and passive detection capabilities. The presence of the Stop Light B [Nakat] radar indicates surface search and navigation functions. The CSU 3-2 and IPS CSU 3 sonars would provide active and passive underwater acoustic detection capabilities, enabling target acquisition and tracking. The Snoop Group radar likely offers improved surface surveillance and fire control data for targeting. The PRS 3-4 and AN 407 systems probably serve as additional sonar or communication systems, supplementing the primary acoustic sensors. The integration of a generic submarine periscope with optical sensors provides a vital means of visual observation and target identification, especially in shallow water operations.

SPECIFICATION: Length: 55.7 m || Beam: 7.2 m || Draft: 5.1 m || Disp: 830 t

SENSORS: Stop Light B [Nakat] || CSU 3-2 || Snoop Group || PRS 3-4 || AN 407 || IPS CSU 3 || Generic Submarine Periscope, Optical

ARMAMENT: 533mm TT