UDT 2024: Aselsan progresses development of mini Düfas towed active sonar system

by Kate Tringham

A scale model of the active array for the miniature version of Düfas on display at UDT 2024. (Janes/Kate Tringham)

Turkish manufacturer Aselsan is progressing development of a miniature version of its Düfas low-frequency towed active sonar system for unmanned surface vessels (USVs), which it expects to complete this year.

Speaking to Janes at the Undersea Defence Technology (UDT) 2024 conference and exhibition in London on 10 April, an Aselsan spokesperson said the company has been working on the smaller version, dubbed Düfas-M, since 2022.

The company is now progressing through tests of the individual hardware components, which it expects to complete in the coming months. Sea trials of the complete system integrated onboard a Marlin USV will start in the second half of 2024, with a view to completing development by year-end, he said.

Developed under the leadership of Türkiye's Defence Industry Agency (SSB) to meet the requirements of the Turkish Navy, Düfas is designed for long-range anti-submarine warfare and surveillance.

Aselsan officially unveiled the full-scale version of Düfas for use on surface combatants in March 2024 following the successful completion of sea trials in late 2023.


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Virginia-class submarine New Jersey delivered to US Navy

by Michael Fabey

Virginia-class submarine New Jersey was delivered to the US Navy. (Janes/Michael Fabey)

HII's Newport News Shipbuilding (NNS) unit confirmed on 25 April it had delivered Virginia-class fast-attack submarine New Jersey (SSN 796) to the US Navy (USN) in a release, noting the SSN is scheduled to be commissioned later in 2024.

The submarine delivery comes at a time when the USN shipbuilding is coming under scrutiny – with the Virginia-class programmes being one of the efforts coming under intense focus – for running far behind schedule.

Not only is the Virginia shipbuilding programme off schedule, but lawmakers are questioning the recent USN fiscal year (FY) 2025 budget request for only a single submarine, when two were expected.

However, USN officials noted they are making the best decisions possible because of workforce and supply-chain issues that continue to plague the efforts to build submarines and other naval vessels.

New Jersey is the 11th Virginia-class submarine delivered by NNS and the 23rd built as part of the teaming agreement with General Dynamics Electric Boat.


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HMS Diamond shoots down Houthi missile in Red Sea

by Kate Tringham

HMS Diamond shoots down a missile fired by Iranian-backed Houthis from Yemen over the Gulf of Aden using its Sea Viper missile system – the first time a Royal Navy warship has intercepted a missile in combat since 1991. (Royal Navy/Crown Copyright)

The UK Royal Navy's (RN's) Daring (Type 45)-class destroyer HMS Diamond (D 34) has successfully engaged an anti-ship ballistic missile (ASBM) launched by Yemen-based Ansar Allah (commonly known as Houthi) rebels targeting a merchant ship in the Gulf of Aden, the service confirmed on 25 April.

During the incident, which took place around 1151 h local time (Sanaa time) on 24 April, Diamond used its Sea Viper anti-air guided weapon system to shoot down the missile, the navy said. According to a US Central Command (CENTCOM) statement issued on 25 April, the missile was likely targeting the US-flagged, owned, and operated merchant vessel MV Yorktown, which has 18 US and four Greek crew members onboard.

No injuries or damage was sustained by the ship or its crew, CENTCOM said.

Diamond


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Vietnam issues diplomatic note to Malaysia after South China Sea collision

by Ridzwan Rahmat

A file image of KM Arau , which collided into a Vietnamese fishing vessel on 22 April. (MMEA)

Hanoi has issued a diplomatic note to Putrajaya after a Malaysia Maritime Enforcement Agency (MMEA) vessel collided into a Vietnamese fishing boat in disputed waters of the South China Sea, multiple sources close to the matter confirmed to Janes .

Vessels involved in the collision are the MMEA's sole Arau (Nojima)-class offshore patrol vessel (OPV) KM Arau and an unnamed fishing boat with pennant number 90729.

The collision took place on 22 April at about 15 n miles southeast of Investigator Shoal, which lies within the Spratly Islands cluster. The feature is occupied by Malaysia, but also claimed by China, Vietnam, and Taiwan as part of their respective maritime territories.

As a result of the collision, 22 fishermen from 90729 fell overboard and a search-and-rescue operation (SAR) was established by both the Vietnamese and Malaysian authorities.


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Turkish manufacturer Aselsan is progressing development of a miniature version of its Düfas low-freq...

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