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Naval Warfare

ROCS Lan Yang (FFG-935)

Frigate Warship [ 1995 ]

ROCS Lan Yang FFG-935 is the former United States Navy USS joseph Hewes FF-1078 fighting surface frigate.

Authored By: Staff Writer | Last Edited: 08/06/2022 | Content ©www.MilitaryFactory.com | The following text is exclusive to this site.

The former Untied States Navy's USS Joseph Hewes (FF-1078) Knox-class fighting frigate stands in as the modern Taiwanese Navy's ROCN Lan Yang (FFG-935). The ship largely retains the original's form-and-function and continues service well past its useful operational service life. The original hull was ordered on August 25th, 1966 and laid down by the Avondale Shipyard of Louisiana on May 14th, 1969. She was launched to sea on March 7th, 1970 and formally commissioned into USN service on April 24th, 1971.

The vessel served up until decommissioned on June 30th, 1994 and was struck from the USN register on January 11th, 1995 - then sold off to Taiwan where, today, she is a hull having surpassed fifty years of on-water operations. In Taiwanese service, the class is known as the Chi Yang-class and the collection of six warships (formerly eight) has been in service for nearly 30 years (the youngest hull being 23 years old as of this writing - 2022).

The Knox-class design displaced 3,215 tons standard and up to 4,200 tons under load. Dimensions included a bow-to-stern length of 438 feet, a beam of 46.8 feet, and a draught of 24.8 feet. Power was served from 2 x CE boiler units of 1,200psi feeding 1 x Westinghouse geared steam turbine developing 35,000 horsepower to a single shaft astern. This arrangement drives the hull to speeds of just over 27 knots.

Aboard the Taiwan ship is a mix of modern search / surface-search radars, the Mk 68 Fire Control System (FCS), and a bow-mounted and towed sonar array. Electronic Warfare (EW) is handled through the AN/SLQ-32 suite.

Armament includes a 5" /54 caliber turreted deck gun, a single Sea Sparrow anti-aircraft missile launcher, 1 x 8-cell Mk 16 surface-to-surface launcher, and 4 x Mark 46 series torpedo tubes. Over the stern is carried a navalized helicopter for the Anti-Submarine Warfare (ASW) / anti-ship role as well as Search and Rescue (SAR) and spotting sorties.

As a whole, the vessel fulfills a critical role in the Republic of China Navy (ROCN) but is well past due in its capabilities when concerning modern naval warfare. The Chi Yang-class consists of six total former USN vessels obtained in the Knox-class standard. This includes FFG-933, FFG-934, FFG-937, FFG-938, and FFG-939 (FF-932 and FFG-936 since being retired).©MilitaryFactory.com
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Service Year

Taiwan national flag graphic

In Active Service.

Chi Yang-class (Knox-class)

ROCS Chih Yang (FFG-932); ROCS Fong Yang (FFG-933); ROCS Fen Yang (FFG-934); ROCS Lan Yang (FFG-935); ROCS Hae Yang (FFG-936); ROCS Hwai Yang (FFG-937); ROCS Ning Yang (FFG-938); ROCS Yi Yang (FFG-939)

National flag of Taiwan Taiwan
(OPERATORS list includes past, present, and future operators when applicable)
Offshore Bombardment
Offshore bombardment / attack of surface targets / areas primarily through onboard ballistic weaponry.
Offshore strike of surface targets primarily through onboard missile / rocket weaponry.
Maritime Patrol
Active patroling of vital waterways and maritime areas; can also serve as local deterrence against airborne and seaborne threats.
Airspace Denial / Deterrence
Neutralization or deterrence of airborne elements through onboard ballistic of missile weaponry.
Fleet Support
Serving in support (either firepower or material) of the main surface fleet in Blue Water environments.

Main armament is housed in primary turret(s) arrangement offering enhanced protection.
Onboard systems alert and protect the vessel from airborne, low-flying airborne threats through ballistic and / or missile weaponry.
An Over-the-Horizon operational capability is granted to the vessel, typically through launched fixed-wing / rotary-wing aircraft.
Ability to launch torpedoes against ocean-going targets.
Ability to launch salvo of rockets against submarine threats.

438.0 ft
133.50 m
46.8 ft
14.26 m
24.8 ft
7.56 m

Installed Power: 2 x CE boiler units feeding 1 x Westinghouse geared-steam turbine developing 35,000 horsepower to 1 x Shaft astern.
Surface Speed
27.5 kts
(31.6 mph)
4,519 nm
(5,200 mi | 8,369 km)

kts = knots | mph = miles-per-hour | nm = nautical miles | mi = miles | km = kilometers

1 kts = 1.15 mph | 1 nm = 1.15 mi | 1 nm = 1.85 km
1 x 5" /54 caliber Mk 42 turreted deck gun.
1 x 8-cell Mk 16 Surface-to-Surface Missile (SSM) launcher (RUR-5 ASROC or Harpoon anti-ship).
1 x 20mm Phalanx Close-In Weapon System (CIWS).
4 x Mark 46 torpedo launchers.

Supported Types

Graphical image of a modern warship turreted deck gun armament
Graphical image of an aircraft Gatling-style rotating gun
Graphical image of an aircraft aerial torpedo
Graphical image of an aircraft anti-ship missile

(Not all weapon types may be represented in the showcase above)
1 x Medium-lift, navalized helicopter supported from the stern-based helipad.

Military lapel ribbon for the Cold War period
Military lapel ribbon for early warship designs
Military lapel ribbon for the Falklands War
Military lapel ribbon for the 1991 Gulf War
Military lapel ribbon for the Korean War
Military lapel ribbon representing modern aircraft
Military lapel ribbon for the Attack on Pearl Harbor
Military lapel ribbon for the Russian Invasion of Ukraine
Military lapel ribbon for the Vietnam War
Military lapel ribbon for the World War 1
Military lapel ribbon for the World War 2

Ribbon graphics not necessarily indicative of actual historical campaign ribbons. Ribbons are clickable to their respective naval campaigns / operations / periods.

Images Gallery

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Image of the ROCS Lan Yang (FFG-935)
Image from the Chinese Ministry of Defense; Public Release.

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