Surface Ship Torpedo Defense (SSTD)
Abstract
ATTDS is a system of systems, comprised of the Torpedo Warning System (TWS) and the Countermeasure Anti-Torpedo Torpedo (CAT). The CAT program developed a canisterized Anti-Torpedo Torpedo (ATT) that provides hard kill torpedo defensive capability for High Value Units (HVUs). The TWS program developed active and passive towed arrays, and electronics processing cabinets to provide Torpedo Detection, Classification, and Localization (TDCL). The SSTD program has developed and fielded five (5) ATTDS Engineering Design Models (EDMs) across five (5) CVNs. Each EDM system is one (1) TWS with a load out of a maximum of eight (8) CATs. In FY20, the ATTDS Program commenced sundown efforts to return the five (5) CVNs to their original configuration. Two (2) system removals completed in FY22, with one (1) more completed in FY23. FY22 funds also supported the demilitarization and transfer of sixteen (16) CATs, and FY23 funding supported the demilitarization and transfer of the remaining eight (8) CATs. FY24 funding will sustain the remaining TWS systems as well as begin Research, Development, Test & Evaluation (RDT&E) planning efforts to develop and incorporate TWS capabilities into the AN/SLQ-25 (Nixie) via Tech Insertions (TIs). FY25 funding is to complete removal of ATTDS and restore NIXIE on the final two CVNs with the system. The funds will also be used to begin development of TDCL capability in support of torpedo defense requirements. Minimal funds will be used to support the remaining ATTDS systems until removal is complete.
Document Details
- Document Type
- Project
- Publication Date
- Oct 01, 2025
- Source ID
- 0225_0603506N_4_1319_PB_2025
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