OVERVIEW: The S 34 *Tikuna* [Type 209-1400 Mod] is a diesel-electric submarine in service with the Brazilian Navy, representing a modernised variant of the proven Type 209 design.

DETAILS:
The *Tikuna* represents a significant upgrade to Brazil's submarine capabilities, reflecting a commitment to maintaining a credible presence in the South Atlantic. Built domestically with technology transfer agreements, its construction highlights Brazil's ambition to develop an indigenous submarine industry. The Type 209-1400 Mod design incorporates improvements over earlier Type 209 variants, including enhanced acoustic signature reduction measures, upgraded sensor packages, and improved automation, allowing for a smaller crew size. The acquisition of the *Tikuna* addresses the need for a modern and capable submarine force able to patrol Brazil's extensive coastline and protect its maritime interests, including offshore oil and gas reserves. The program also served as a crucial stepping stone for Brazil's more ambitious nuclear-powered submarine program.

The primary roles of the *Tikuna* are anti-submarine warfare (ASW), anti-surface warfare (ASuW), intelligence gathering, and maritime surveillance. The submarine's modern sensor suite provides robust capabilities for detecting and tracking both surface and subsurface targets. In ASW operations, the advanced sonar systems enable the *Tikuna* to effectively locate and engage hostile submarines, protecting vital shipping lanes and naval assets. The ASuW role is facilitated by its torpedo armament, allowing it to engage enemy surface combatants. Its extended patrol endurance and advanced communications suite make it well-suited for long-range surveillance missions, providing critical intelligence to naval commanders. The relatively quiet running of the diesel-electric design enhances its stealth capabilities for these missions.

Technologically, the *Tikuna* is equipped with the TRS 3100 Calypso III radar (designated DRUA 33C when configured as a radar warning receiver), providing surface search and navigation capabilities. The DR 4000U electronic support measures (ESM) suite allows for the detection and identification of radar emissions from surface ships and aircraft, enhancing situational awareness. The CSU 83/1 and IPS CSU 83 integrated sonar suite includes active and passive sonar capabilities for target detection, classification, and tracking. The MAS 83 mine avoidance sonar assists in navigating through mined waters and avoiding underwater obstacles. The generic submarine periscopes, both optical and LLTV (Low Light Television) equipped, provide visual observation capabilities, particularly useful in coastal environments. The standard 533mm torpedo tubes provide a versatile offensive capability against surface and subsurface targets.

SPECIFICATION: Length: 61.2 m || Beam: 6.3 m || Draft: 5.5 m || Disp: 1454 t

SENSORS: TRS 3100 Calypso III [DRUA 33C] || DR 4000U || CSU 83/1 || IPS CSU 83 || MAS 83 || Generic Submarine Periscope, Optical || Generic Submarine Periscope, LLTV

ARMAMENT: 533mm TT