Direct proof of use
The Frankenthal-class Yemen record rests on UAE service of former German Type 332 mine-countermeasure vessels and a July 2017 incident near Mocha. Maritime Security & Defence reported that the UAE Navy's two Al Murjan, former German Frankenthal-class, mine-countermeasure vessels were acquired in 2006, upgraded in 2011, and that one was seriously damaged in 2017 during operations against Yemen's rebel forces.
A 2024 Revista General de Marina article placed the Emirati Frankenthal-class MHC Al-Qasnah at Mocha, Yemen, on 29 July 2017 and described the coalition's mine-neutralization effort in the Red Sea before stating that the Al-Qasnah was sunk in July 2017 by a drone attack. The same incident was reported at the time by Al Jazeera, which said Houthi officials claimed an attack on a UAE military ship arriving at al-Makha while a Saudi Press Agency-cited coalition statement described an explosives-laden boat hitting a pier near ships at the port.
Sources: Maritime Security and Defence 2/2021, Revista General de Marina Naval Mines, Al Jazeera Mocha UAE Ship Attack
Timeline
The UAE acquired two former German Frankenthal-class mine-countermeasure vessels in 2006 and upgraded them in 2011, according to Maritime Security & Defence. That acquisition context identifies the class in UAE service before the Yemen intervention.
On 29 July 2017, Houthi officials claimed an attack on a UAE military ship near Mocha, and Al Jazeera reported the coalition's statement that an explosives-laden boat struck a pier close to a group of ships. Later naval and maritime-security sources connected the damaged or sunk mine-countermeasure vessel to the former German Frankenthal/Al Murjan class and identified Al-Qasnah at Mocha on the same date.
Sources: Maritime Security and Defence 2/2021, Al Jazeera Mocha UAE Ship Attack, Revista General de Marina Naval Mines
Narrative
In the Yemen Civil War, the documented Frankenthal-class role was maritime mine countermeasures and force protection for the Saudi-led coalition's Red Sea operations. The vessel was not a Houthi weapon; it was a UAE-operated coalition mine-countermeasure vessel exposed to Houthi maritime threats around Mocha and the Red Sea approaches.
The source record separates mine-countermeasure employment from the attack mechanism. Revista General de Marina describes a wider coalition effort that had neutralized more than 160 naval mines in the area and says that effort cost the Emirati Al-Qasnah in July 2017. Al Jazeera's day-of reporting instead emphasized competing claims about the attack and recorded the coalition's statement that there were no casualties or substantial damage.
The available public sources therefore support fielding and combat exposure of a UAE-operated former Frankenthal-class mine-countermeasure vessel in the Yemen Civil War, with later specialist sources reporting serious damage or sinking. They do not provide a full operational history for the individual hull, a verified casualty count, or a conclusive public account reconciling the coalition's initial denial of substantial damage with later damage assessments.
Sources: Revista General de Marina Naval Mines, Maritime Security and Defence 2/2021, Al Jazeera Mocha UAE Ship Attack, Covert Shores Houthi Naval Capabilities
