The AN/SLQ-25 Nixie and its variants are towed torpedo decoys used on US and allied warships. It consists of a towed decoy device (TB-14A) and a shipboard signal generator. The Nixie is capable of defeating wake-homing, acousting-homing, and wire-guided torpedoes. The decoy emits signals to draw a torpedo away from its intended target.
SLQ-25 Nixie aboard USS IowaTB-14A towed decoy, from the AN/SLQ-25A/C "Nixie" system
The Nixie attempts to defeat a torpedo's passive sonar by emitting simulated ship noise—such as propeller and engine noise—or defeat a torpedo's active sonar by amplifying and returning its pings.[1] Typically, larger ships may have two Nixie systems mounted at the stern of the ship to allow operation singularly or in pairs while smaller ships may have only one system.
The AN/SLQ-25A was introduced in 1987.[2] It is a clean-sheet design when compared to the original AN/SLQ-25 Nixie. Apart from a few minor mechanical components, they share no common parts. The AN/SLQ-25A utilises a fiber optic tow cable (FOTC) and a 10-horsepower (7.5 kW) RL-272C double drum winch. Several engineering changes resulted in commercial off-the-shelf (COTS) equipment being utilised extensively in the system. A diagnostic program can be initiated locally or from the remote control station, and tests all electronic functions. The AN/SLQ-25A provides improved deceptive countermeasures capability over the original Nixie.[3][4]
The AN/SLQ-25B variant includes equipment of the AN/SLQ-25A and introduced a towed array sensor to detect submarines and incoming torpedoes. It also includes a fiber optic display LAN. Previous versions could only simulate ship noise and were effective against passive homing torpedoes but ineffective against active homing torpedoes; the AN/SLQ-25B added the ability to defeat active homing torpedoes by intercepting, amplifying, and returning the sonar pings from the incoming torpedo.[5][3][4]
The AN/SLQ-25C was first procured in 2007 and is a general electronics upgrade of the AN/SLQ-25A. The AN/SLQ-25C has additional countermeasure modes, more reliable power amplification, a new COTS signal generator, and a longer, more functional littoral fiber optic tow cable (LFOTC) for operation in shallow water.[6][4][7]
The AN/SLQ-25D was a planned upgrade with a contract awarded in 2009.[8] It was to feature an open architecture, allowing it to serve as a host to other systems and support their information gathering and threat detection.[7] In 2012, the AN/SLQ-25D program became a part of the Surface Ship Torpedo Defense (SSTD) program, a US Navy effort to field a system that could detect and destroy incoming torpedoes. The AN/SLQ-25D was redesignated as the AN/SLQ-25X, and it was intended to be the tow point for the torpedo detection sensors.[9] However, the Navy canceled the SSTD program and with it the AN/SLQ-25X in 2018.[10]
In place of the canceled AN/SLQ-25X, AN/SLQ-25E procurement began in 2022. The AN/SLQ-25E addresses obsolescence issues with previous AN/SLQ-25 variants by updating the hardware and software to a COTS-based, modular, and open architecture. The AN/SLQ-25E has improved capability against wake-homing, acoustic-homing, and wire-guided torpedoes. All existing AN/SLQ-25 units are being upgraded to the AN/SLQ-25E baseline.[11]
An improved torpedo countermeasure system called the AN/SLQ-61 Lightweight Tow (LWT) Torpedo Defense Mission Module (TDMM) is lighter than the AN/SLQ-25 and has a different tow profile, making it more suited for small combatant warships operating in littoral environments. The LWT is a modular, digitally controlled soft kill countermeasure decoy that can defend ships against wake-homing, acoustic-homing, and wire-guided torpedoes.[12]
Referencesedit
^"AN/SLQ-25 NIXIE". FAS Military Analysis Network. Retrieved 2022-05-18.
^"Sensytech Receives Two Contracts For Torpedo Defense System". Defense aerospace. 2002-12-18. Retrieved 2023-06-17.
^ abArchus, Dorian (2020-12-26). "US Navy selects Ultra for NIXIE electro-acoustic towed torpedo countermeasure system - Naval Post- Naval News and Information". Retrieved 2023-06-17.
^U.S. Navy Completes Lightweight Torpedo Defense Mission Module Testing. Navy Recognition. 5 May 2018.
External linksedit
Inside Battleship New Jersey’s Nixie Room on YouTube
January 01, 1970
nixie, this, article, includes, list, references, related, reading, external, links, sources, remain, unclear, because, lacks, inline, citations, please, help, improve, this, article, introducing, more, precise, citations, january, 2013, learn, when, remove, t. This article includes a list of references related reading or external links but its sources remain unclear because it lacks inline citations Please help improve this article by introducing more precise citations January 2013 Learn how and when to remove this template message The AN SLQ 25 Nixie and its variants are towed torpedo decoys used on US and allied warships It consists of a towed decoy device TB 14A and a shipboard signal generator The Nixie is capable of defeating wake homing acousting homing and wire guided torpedoes The decoy emits signals to draw a torpedo away from its intended target SLQ 25 Nixie aboard USS Iowa TB 14A towed decoy from the AN SLQ 25A C Nixie system The Nixie attempts to defeat a torpedo s passive sonar by emitting simulated ship noise such as propeller and engine noise or defeat a torpedo s active sonar by amplifying and returning its pings 1 Typically larger ships may have two Nixie systems mounted at the stern of the ship to allow operation singularly or in pairs while smaller ships may have only one system Contents 1 Variants 2 Further development 3 References 4 External linksVariants editThe AN SLQ 25A was introduced in 1987 2 It is a clean sheet design when compared to the original AN SLQ 25 Nixie Apart from a few minor mechanical components they share no common parts The AN SLQ 25A utilises a fiber optic tow cable FOTC and a 10 horsepower 7 5 kW RL 272C double drum winch Several engineering changes resulted in commercial off the shelf COTS equipment being utilised extensively in the system A diagnostic program can be initiated locally or from the remote control station and tests all electronic functions The AN SLQ 25A provides improved deceptive countermeasures capability over the original Nixie 3 4 The AN SLQ 25B variant includes equipment of the AN SLQ 25A and introduced a towed array sensor to detect submarines and incoming torpedoes It also includes a fiber optic display LAN Previous versions could only simulate ship noise and were effective against passive homing torpedoes but ineffective against active homing torpedoes the AN SLQ 25B added the ability to defeat active homing torpedoes by intercepting amplifying and returning the sonar pings from the incoming torpedo 5 3 4 The AN SLQ 25C was first procured in 2007 and is a general electronics upgrade of the AN SLQ 25A The AN SLQ 25C has additional countermeasure modes more reliable power amplification a new COTS signal generator and a longer more functional littoral fiber optic tow cable LFOTC for operation in shallow water 6 4 7 The AN SLQ 25D was a planned upgrade with a contract awarded in 2009 8 It was to feature an open architecture allowing it to serve as a host to other systems and support their information gathering and threat detection 7 In 2012 the AN SLQ 25D program became a part of the Surface Ship Torpedo Defense SSTD program a US Navy effort to field a system that could detect and destroy incoming torpedoes The AN SLQ 25D was redesignated as the AN SLQ 25X and it was intended to be the tow point for the torpedo detection sensors 9 However the Navy canceled the SSTD program and with it the AN SLQ 25X in 2018 10 In place of the canceled AN SLQ 25X AN SLQ 25E procurement began in 2022 The AN SLQ 25E addresses obsolescence issues with previous AN SLQ 25 variants by updating the hardware and software to a COTS based modular and open architecture The AN SLQ 25E has improved capability against wake homing acoustic homing and wire guided torpedoes All existing AN SLQ 25 units are being upgraded to the AN SLQ 25E baseline 11 Further development editUnder a joint UK US memorandum of understanding the UK MoD and the US DoD are furthering torpedo survivability systems The US is currently working on an Active Source program called the DCL Technology Demonstrator programme and the UK has developed and entered into service the S2170 Surface Ship Torpedo Defence system An improved torpedo countermeasure system called the AN SLQ 61 Lightweight Tow LWT Torpedo Defense Mission Module TDMM is lighter than the AN SLQ 25 and has a different tow profile making it more suited for small combatant warships operating in littoral environments The LWT is a modular digitally controlled soft kill countermeasure decoy that can defend ships against wake homing acoustic homing and wire guided torpedoes 12 References edit AN SLQ 25 NIXIE FAS Military Analysis Network Retrieved 2022 05 18 Sensytech Receives Two Contracts For Torpedo Defense System Defense aerospace 2002 12 18 Retrieved 2023 06 17 a b Archus Dorian 2020 12 26 US Navy selects Ultra for NIXIE electro acoustic towed torpedo countermeasure system Naval Post Naval News and Information Retrieved 2023 06 17 a b c AN SLQ 25 NIXIE man fas org Retrieved 2023 06 17 20 5M for 3 More NIXIE Torpedo Decoy Systems Defense Industry Daily 2005 06 30 Retrieved 2023 06 17 Department of Defense Fiscal Year FY 2024 Budget Estimates PDF United States Department of Defense March 2023 Retrieved 2023 06 17 a b 48 5M to Alion for Torpedo Detection System RD and Testing Defense Industry Daily 2009 08 26 Retrieved 2023 06 17 U S Navy Awards Argon ST 6 2 Million to Upgrade Its Surface Ship Torpedo Defense Program ArgonST 2009 06 01 Retrieved 2023 06 17 Rockwell David 2018 08 01 Submarine Sonar Systems Teal Group Retrieved 2023 06 17 Surface Ship Torpedo Defense SSTD System Torpedo Warning System TWS and Countermeasure Anti Torpedo CAT PDF The Office of the Director Operational Test and Evaluation Retrieved 2023 06 17 Justification Book PDF Department of the Navy pp 1 2 Retrieved 2023 06 17 U S Navy Completes Lightweight Torpedo Defense Mission Module Testing Navy Recognition 5 May 2018 External links editInside Battleship New Jersey s Nixie Room on YouTube Retrieved from https en wikipedia org w index php title AN SLQ 25 Nixie amp oldid 1214760416, wikipedia, wiki, book, books, library,
