USCGC ''Red Cedar'' (WLM-688) is a coastal
buoy tender
A buoy tender is a type of vessel used to maintain and replace navigational buoys. This term can also apply to an actual person who does this work.
The United States Coast Guard uses buoy tenders to accomplish one of its primary missions of main ...
that was designed, built, owned, and operated by the
United States Coast Guard
The United States Coast Guard (USCG) is the maritime security, search and rescue, and Admiralty law, law enforcement military branch, service branch of the armed forces of the United States. It is one of the country's eight Uniformed services ...
. She was
launched in 1970 and homeported in
Norfolk, Virginia
Norfolk ( ) is an independent city (United States), independent city in the U.S. state of Virginia. It had a population of 238,005 at the 2020 United States census, 2020 census, making it the List of cities in Virginia, third-most populous city ...
. Her primary mission was to maintain over 400 aides to navigation in
Chesapeake Bay
The Chesapeake Bay ( ) is the largest estuary in the United States. The bay is located in the Mid-Atlantic (United States), Mid-Atlantic region and is primarily separated from the Atlantic Ocean by the Delmarva Peninsula, including parts of the Ea ...
,
Tangier Sound
Tangier Sound is a sound of the Chesapeake Bay bounded on the west by Tangier Island in Virginia, and Smith Island and South Marsh Island in Maryland, by Deal Island in Maryland on the north, and the mainland of the Eastern Shore of Maryland an ...
, the
Potomac,
Rappahannock,
York
York is a cathedral city in North Yorkshire, England, with Roman Britain, Roman origins, sited at the confluence of the rivers River Ouse, Yorkshire, Ouse and River Foss, Foss. It has many historic buildings and other structures, such as a Yor ...
, and
James Rivers, and other nearby waterways.
Her secondary missions included search and rescue, light
icebreaking
An icebreaker is a special-purpose ship or boat designed to move and navigate through ice-covered waters, and provide safe waterways for other boats and ships. Although the term usually refers to ice-breaking ships, it may also refer to smaller ...
, law enforcement, and
marine environmental protection Marine environmental protection is one of the eleven missions of the United States Coast Guard (USCG).
Protecting the delicate ecosystem of oceans is a vital Coast Guard mission. The Coast Guard works with a variety of groups and organizations to ...
. She was assigned to the 5th Coast Guard District.
At the end of her Coast Guard career in 1999 she was transferred to the
Argentine Navy
The Argentine Navy (ARA; ). This forms the basis for the navy's ship prefix "ARA". is the navy of Argentina. It is one of the three branches of the Armed Forces of the Argentine Republic, together with the Argentine Army, Army and the Argentine ...
, which renamed her ARA ''Ciudad'' ''de Zárate.'' She remains in active service.
Construction and characteristics
''Red Cedar'' was built at the
Coast Guard Yard
The United States Coast Guard Yard or just Coast Guard Yard is a United States Coast Guard operated shipyard located on Curtis Bay in northern Anne Arundel County, Maryland, just south of the Baltimore city limits. It is the Department of Homela ...
in
Curtis Bay, Maryland
Curtis Bay is a residential / commercial / industrial neighborhood in the southern portion of the City of Baltimore, Maryland, United States.
The neighborhood is on steep sloping heights, about four city blocks wide (west to east) and fifteen ...
. Her
keel was laid down on 1 July 1969. She was launched on 1 August 1970. She was christened by Virginia Downing, wife of
U.S. Representative Thomas N. Downing, who was a member of the
United States House Committee on Merchant Marine and Fisheries The United States House Committee on Merchant Marine and Fisheries is a defunct United States Congressional committee, committee of the United States House of Representatives, U.S. House of Representatives.
The Committee on Merchant Marine and Fish ...
, which had jurisdiction over the Coast Guard budget. Also attending the ceremony were
Edward A. Garmatz, chairman of the committee, and
Commandant of the Coast Guard
Commandant ( or ; ) is a title often given to the officer in charge of a military (or other uniformed service) training establishment or academy. This usage is common in English-speaking nations. In some countries it may be a military or police ...
Admiral
Chester R. Bender
Chester R. Bender (March 14, 1914 – July 20, 1996) served as the fourteenth Commandant of the Coast Guard, Commandant of the United States Coast Guard from 1970 to 1974. He also served as Superintendent of the United States Coast Guard Academy ...
. ''Red Birch''s initial cost was $3,402,176.
She was the fourth Red-class ship built.
Her hull was built of welded steel plates. The ship was
long overall
Length overall (LOA, o/a, o.a. or oa) is the maximum length of a vessel's hull measured parallel to the waterline. This length is important while docking the ship. It is the most commonly used way of expressing the size of a ship, and is also u ...
, with a
beam
Beam may refer to:
Streams of particles or energy
*Light beam, or beam of light, a directional projection of light energy
**Laser beam
*Radio beam
*Particle beam, a stream of charged or neutral particles
**Charged particle beam, a spatially lo ...
of , and a
draft
Draft, the draft, or draught may refer to:
Watercraft dimensions
* Draft (hull), the distance from waterline to keel of a vessel
* Draft (sail), degree of curvature in a sail
* Air draft, distance from waterline to the highest point on a v ...
of . Her shallow draft and flat bottom was required for her work along the edges of dredged channels, but this hull form made her harder to maneuver and more prone to rolling.
Her hull was reinforced for light icebreaking. She
displaced 471 tons with a light load, and 572 tons with a full load.
The ship had two
Caterpillar
Caterpillars ( ) are the larval stage of members of the order Lepidoptera (the insect order comprising butterflies and moths).
As with most common names, the application of the word is arbitrary, since the larvae of sawflies (suborder ...
D398A 12-cylinder
diesel engine
The diesel engine, named after the German engineer Rudolf Diesel, is an internal combustion engine in which Combustion, ignition of diesel fuel is caused by the elevated temperature of the air in the cylinder due to Mechanics, mechanical Compr ...
s rated at each. These drove two four-bladed
controllable-pitch propellers which were in diameter. Red-class ships had a maximum speed of . She had a
bow thruster
Manoeuvering thrusters (bow thrusters and stern thrusters) are transversal propulsion devices built into or mounted to either the Bow (watercraft), bow or stern (front or back, respectively) of a ship or boat to make it more manoeuvrable. Bow th ...
for increased maneuverability. This was driven by a power take-off from the
starboard
Port and starboard are Glossary of nautical terms (M-Z), nautical terms for watercraft and spacecraft, referring respectively to the left and right sides of the vessel, when aboard and facing the Bow (watercraft), bow (front).
Vessels with bil ...
propulsion engine.
''Red Cedar''s tanks held of diesel fuel. This gave her a range of at , or at full speed.
There were three engine control stations, two on the
bridge
A bridge is a structure built to Span (engineering), span a physical obstacle (such as a body of water, valley, road, or railway) without blocking the path underneath. It is constructed for the purpose of providing passage over the obstacle, whi ...
wings and one in the pilothouse.
Her buoy deck featured a crane with the ability to lift 10 tons, which could be controlled from two different stations just below the bridge deck.
The cranes' hydraulics were driven by a power take-off from the port propulsion engine.
Her buoy deck had of working space.
The ship had a crew of five officers and twenty-eight enlisted sailors.
Crew quarters were air-conditioned, a notable improvement in comfort at the time.
U.S. Coast Guard service

''Red Cedar'' was placed in commission at a ceremony at the Coast Guard Yard on 18 December 1970. The bulk of her time was spent at sea tending her buoy fleet and a number of lighthouses, or moored, maintaining the ship and training the crew.
Maintaining her buoys included verifying that they were in their charted positions, replacing lights and batteries, cleaning off marine growth and bird guano, and inspecting and replacing their mooring chains and sinkers.
''Red Cedar'' was also responsible for the maintenance of a number of lighthouses in Chesapeake Bay, including the
Thimble Shoal Light,
Thomas Point Shoal Light
The Thomas Point Shoal Light, also known as Thomas Point Shoal Light Station, is a historic lighthouse in the Chesapeake Bay on the east coast of the United States, and the most recognized lighthouse in Maryland. It is the only screw-pile lighth ...
,
Fort Washington Light, Hambrooks Bar Light, and Craighill Light.
On occasion, she was assigned a variety of other missions, as described below.
Search and rescue
In October 1972, ''Red Cedar'' was sent to
Hopewell to assist victims of James River flooding.
Two construction barges at the
Hampton Roads Tunnel broke free from their moorings in high winds in February 1973. ''Red Cedar'' and USCGC ''Mohican'' were dispatched to attempt to capture them.
The Argentine bulk carrier ''Santa Cruz II'' collided with
USCGC ''Cuyahoga'' on 20 October 1978 near the mouth of the Potomac River. The cutter sank, and 11 of her crew were missing after the event. ''Red Cedar'' was sent to the scene as a platform for U.S. Navy and Coast Guard divers searching in the wreck.
A barge with 5,000 bushels of soy beans aboard sank in Chesapeake Bay in February 1979. ''Red Cedar'' set a temporary buoy on the wreck to prevent ships from hitting the uncharted obstruction.
Marine environmental protection
The Hambrooks Bar Light in the
Choptank River
The Choptank River is a major tributary of the Chesapeake Bay and the largest river on the Delmarva Peninsula. Running for ,U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map, accessed April 1, 2 ...
was repaired to preserve its historic value by ''Red Cedar'' during September 1991.
Winter operations

''Red Cedar'' was used for light icebreaking in Chesapeake Bay and the rivers that emptied into it starting in her first winter afloat. Her icebreaking was particularly significant because a number of coastal communities were dependent on barges for the delivery of heating oil, gasoline, and fuel for power plants. She broke ice on the
Delaware
Delaware ( ) is a U.S. state, state in the Mid-Atlantic (United States), Mid-Atlantic and South Atlantic states, South Atlantic regions of the United States. It borders Maryland to its south and west, Pennsylvania to its north, New Jersey ...
,
Wicomico, and
Nanticoke Rivers. Her icebreaking was sometimes used to free ships that had been frozen in.
Large buoys in freshwater rivers where ice conditions are difficult can be damaged, sunk, or dragged off-station by the movement of the ice. In the fall, ''Red Cedar'' replaced 55 such buoys with smaller seasonal buoys which were less susceptible to ice damage.
In the spring, she swapped these out for the larger summer buoys.
Public engagement
The Coast Guard offered tours of ''Red Cedar'' on several occasions including:
* Coast Guard open house in August 1986
* Chrysanthemum Festival in
New Bern
New Bern, formerly Newbern, is a city in Craven County, North Carolina, United States, and its county seat. It had a population of 31,291 at the 2020 United States census, 2020 census. It is located at the confluence of the Neuse River, Neuse a ...
in October 1989
* Dogwood Festival in
Salisbury
Salisbury ( , ) is a city status in the United Kingdom, cathedral city and civil parish in Wiltshire, England with a population of 41,820, at the confluence of the rivers River Avon, Hampshire, Avon, River Nadder, Nadder and River Bourne, Wi ...
in May 1997, and May 1998
Awards and honors
''Red Cedar'' earned a
Coast Guard Unit Commendation
The Coast Guard Unit Commendation is the highest peacetime unit award that may be awarded to military commands of the United States Coast Guard. The decoration was first created in 1963 and is presented to members of any Coast Guard unit that di ...
for her icebreaking in January 1977. The ship's efforts to salvage
USCGC ''Cuyahoga'' earned her a
Meritorious Unit Commendation
The Meritorious Unit Commendation (MUC; pronounced ''muck'') is a mid-level unit award of the United States Armed Forces. The U.S. Army awards units the Army MUC for exceptionally meritorious conduct in performance of outstanding achievement or ...
in October 1978. She earned another meritorious unit commendation for removing fishnet stake buoys in Chesapeake Bay in 1993.
Decommissioning and transfer
''Red Cedar'' was decommissioned on 16 March 1999.
She was replaced in Portsmouth by the
USCGC ''Frank Drew''. Under the
Foreign Assistance Act of 1961
The Foreign Assistance Act (, et seq.) is a United States law governing foreign aid policy. It outlined the political and ideological principles of U.S. foreign aid, significantly overhauled and reorganized the structure of U.S. foreign assista ...
, surplus military equipment could be transferred to other countries through the Excess Defense Articles program to support U.S. foreign policy objectives. ''Red Cedar'' was transferred to the Argentine Navy through this program after her decommissioning by the U.S. Coast Guard. This transfer was part of a comprehensive program to improve the Argentine Navy's ability to interdict illicit drugs and their precursor chemicals.
Argentine Navy service
On 30 March 1999 the ship was reflagged and became ARA ''Ciudad'' ''de Zárate'' (Q61)''.'' She is assigned to the Escuadrilla de Ríos (River Squadron) and is homeported at the Zarate Naval Base near
Buenos Aires
Buenos Aires, controlled by the government of the Autonomous City of Buenos Aires, is the Capital city, capital and largest city of Argentina. It is located on the southwest of the Río de la Plata. Buenos Aires is classified as an Alpha− glob ...
. The voyage to her new homeport took 70 days and included port calls in 10 countries.
''Ciudad'' ''de Zárate'' is classed as a "multipurpose ship" and has been used to provide health care and food distribution to remote river communities, training not only for the Argentine Navy, but also for the armed forces of
Paraguay
Paraguay, officially the Republic of Paraguay, is a landlocked country in South America. It is bordered by Argentina to the Argentina–Paraguay border, south and southwest, Brazil to the Brazil–Paraguay border, east and northeast, and Boli ...
and
Bolivia
Bolivia, officially the Plurinational State of Bolivia, is a landlocked country located in central South America. The country features diverse geography, including vast Amazonian plains, tropical lowlands, mountains, the Gran Chaco Province, w ...
,
and buoy tending, not only in Argentina, but in neighboring
Uruguay
Uruguay, officially the Oriental Republic of Uruguay, is a country in South America. It shares borders with Argentina to its west and southwest and Brazil to its north and northeast, while bordering the Río de la Plata to the south and the A ...
as well. The ship transports a
Marine Infantry Battalion on the river as needed. She has trained with combatant ships to support military operations.
During her community health campaigns, the ship carried two containers on her buoy deck which contained a dental chair, x-ray machine, oxygen, and other equipment. The campaigns provided primary care, dentistry, pediatric, gynecology, urology, cardiology, obstetrics, ophthalmology, and other medical services. Among the places visited were Puerto de Santa Fe,
Rosario
Rosario () is the largest city in the central provinces of Argentina, Argentine province of Santa Fe Province, Santa Fe. The city, located northwest of Buenos Aires on the west bank of the Paraná River, is the third-most populous city in the ...
, Colonia Cano,
Puerto Bermejo, Puerto Las Palmas,
Isla del Cerrito
Isla del Cerrito is a village and municipality of the Chaco Province in Northern Argentina, at the Argentina–Paraguay border
The Argentina–Paraguay border is the line that limits the territories of Argentina and Paraguay. This boundary is so ...
, Isla Soto, and General Lavalle.
The ship conducted these campaigns in multiple years, including 2012, 2018, and 2019.
''Ciudad'' ''de Zárate'' was opened for public tours on several occasions including:
* Navy Day in May 2012 in Puerto de Santa Fe
*
Posadas port visit in June 2008
* Navy Day in May 2017 in Bella Vista,
Corrientes
Corrientes (; Guaraní: Taragui, literally: "Currents") is the capital city of the province of Corrientes, Argentina, located on the eastern shore of the Paraná River, about from Buenos Aires and from Posadas, on National Route 12. It has ...
.
In July 2020 ''Ciudad'' ''de Zárate'' and her sistership,
ARA ''Ciudad de Rosario'''','' transported firefighters to grassland wildfires on islands in the
Paraná River Delta.
During the
COVID-19
Coronavirus disease 2019 (COVID-19) is a contagious disease caused by the coronavirus SARS-CoV-2. In January 2020, the disease spread worldwide, resulting in the COVID-19 pandemic.
The symptoms of COVID‑19 can vary but often include fever ...
pandemic in 2020, the ship delivered
personal protective equipment
Personal protective equipment (PPE) is protective clothing, helmets, goggles, or other garments or equipment designed to protect the wearer's body from injury or infection. The hazards addressed by protective equipment include physical, elect ...
, and cleaning supplies to remote river communities.
References
{{DEFAULTSORT:Red Cedar
1970 ships
Ships built by the United States Coast Guard Yard
Red-class coastal buoy tenders
Zárate-class auxiliary ships
Auxiliary ships of Argentina
Ships built in Maryland