From Peacetime Diplomacy to Atlantic Convoy Patrols—The Story of USS Omaha
Commissioned in 1923, USS Omaha (CL-4) was the lead ship of the Omaha-class light cruisers, originally designed as a scout cruiser. Throughout the interwar years, she served as a diplomatic showpiece, winning fleet awards and visiting ports across the Pacific and Atlantic. With the outbreak of World War II, the ship took on a new role—hunting German blockade runners and escorting vital convoys in the Atlantic.
This is the story of how a peacetime cruiser became a wartime workhorse, culminating in her role in Operation Dragoon.
The Construction of USS Omaha: A New Era of Light Cruisers
USS Omaha was laid down on December 6, 1918, at the Todd Dry Dock and Construction Company in Tacoma, Washington. She was launched two years later, on December 14, 1920, and sponsored by Louise Bushnell White, a descendant of David Bushnell, the inventor of the Revolutionary War-era submarine Turtle.
Commissioned on February 24, 1923, under Captain David C. Hanrahan, Omaha-class cruisers were envisioned as fast scouts, bridging the gap between destroyers and capital ships.
Specifications and Engineering
The Omaha was designed for speed and endurance, measuring 555 feet 6 inches long with a 55-foot beam and a draft of 14 feet 3 inches. Her standard displacement was 7,050 tons, increasing to 9,508 tons at full load. Powered by four Westinghouse geared steam turbines and 12 Yarrow boilers, she produced 90,000 horsepower, for a top speed of 35 knots.
Plot Points
Armament and Evolution
Omaha’s original main battery consisted of ten 6-inch/53 caliber guns, with four placed in twin turrets fore and aft and six in tiered casemates along the superstructure. She also carried two 3-inch/50 caliber anti-aircraft guns, two triple and two twin 21-inch torpedo tube mounts, and had the capacity to lay mines.
But over the years, Omaha’s armament underwent upgrades.
In 1926, her mine tracks were removed. By 1933, her anti-aircraft defenses were increased, replacing the original two 3-inch guns with eight new mounts. Before World War II, her lower torpedo tubes and aft casemate guns were removed for poor placement in wet conditions. During the war, Omaha received quadruple 1.1-inch anti-aircraft mounts, later replaced by 40mm Bofors guns and 20mm Oerlikon cannons for improved air defense.
Armor and Protection
Unlike heavily armored cruisers, Omaha’s protection was modest, prioritizing speed and maneuverability. She lacked a full-length armor belt, relying on three inches of armor around machinery spaces and steering gears. The conning tower and deck armor were only 1.5 inches thick, making her vulnerable to direct hits. Additionally, her gun turrets were unarmored, exposing the crew to incoming fire.
Omaha also carried two floatplanes for reconnaissance, originally Vought VE-9s, later replaced by Curtiss SOC Seagulls (1935) and Vought OS2U Kingfishers (1940). These aircraft, launched via twin catapults, expanded Omaha’s scouting and spotting capabilities.
Interwar Service of USS Omaha
Following her commissioning, USS Omaha conducted sea trials near Puget Sound in August 1923. After final modifications, she moved to Mare Island Navy Yard for ammunition loading before joining the Battle Fleet in December.
Omaha’s capabilities as a fast scout cruiser caught the attention of Rear Admiral Sumner E. W. Kittelle, who briefly designated her as flagship of the Destroyer Squadrons in late 1923. Though she only served in this role until March 1924, she continued operations along the Pacific coast and Central America, with periodic deployments to Hawaii, the Caribbean, and Panama. In 1925, the ship embarked on a goodwill tour to Australia and New Zealand, strengthening US diplomatic ties in the Pacific.
Grounding Incident in the Bahamas (1937)
Shortly after her reassignment, Omaha ran aground on Castle Island, Bahamas, on July 19, 1937. The impact was described as a gradual deceleration as her keel scraped a smooth reef. Since the incident occurred at high tide, efforts to free the cruiser were a challenge.
To lighten the ship, Omaha’s crew offloaded supplies while tugs and destroyers circled, attempting to generate waves to dislodge her. After ten days, the ship was finally pulled free. She immediately departed for Norfolk Navy Yard for hull repairs. A court-martial found Captain Howard B. Mecleary guilty of negligence and demoted him 25 positions on the captains’ list. The cruiser returned to duty on February 14, 1938, and resumed operations following sea trials in Guantánamo Bay.
Early Service in World War II
On December 7, 1941, USS Omaha was en route from San Juan to Recife when news arrived of the Japanese attack on Pearl Harbor. Captain Theodore E. Chandler assembled the crew and read the urgent message: they were ordered to “execute WPL 46 (war plan) against Japan.” The following day, the United States declared war on Japan.
Merchant Rescue and U-Boat Warfare
Omaha’s first wartime service came on May 8, 1942, when she intercepted the Swedish ship Astri. Onboard were survivors from the American freighter Lammot Du Pont, which had been sunk on April 23 by the German U-boat U-125. The men had spent two days adrift before being rescued.
Weeks later, on June 1, Omaha spotted a distress beacon and discovered eight British survivors from the merchant vessel Charlbury. The ship had been attacked on May 28 by the Italian submarine Barbarigo while en route to Argentina. Omaha retrieved another 32 survivors and transported them to Recife.
Omaha’s role as rescuer continued on June 8, when she found eight survivors from the British merchant Harpagon aboard the Argentine ship Rio Diamante. Harpagon had been sunk on April 20 by U-109, leaving its survivors adrift for 35 days before being rescued.
Rising Tensions in the South Atlantic
In August 1942, German submarine U-507 sank five Brazilian merchant ships in just two days, killing over 500 people. Days later, Omaha docked in Uruguay, where her crew saw the rusting remains of the German cruiser Admiral Graf Spee, scuttled in 1939 after the Battle of the River Plate. While in port, a Brazilian naval officer informed Captain Chandler that Brazil would formally declare war on Germany and Italy that day, bringing South America further into the war.
Collision with Milwaukee
Omaha spent most of 1943 patrolling the South Atlantic alongside her sister ships, Milwaukee and Memphis, without encountering enemy vessels. But on April 30, while maneuvering in formation, Milwaukee accidentally struck Omaha’s starboard bow, causing flooding and damage to Omaha’s armor plating. Her damage control team responded, using mattresses to seal one leak. Though one compartment remained flooded, she continued operations.
Milwaukee suffered more severe damage, with unusable torpedo tubes and compromised structural integrity. Both ships completed their patrol before undergoing repairs in Rio de Janeiro.
Sinking German Blockade Runners
Omaha’s quiet South Atlantic service ended in January 1944. While patrolling on January 4, her aircraft spotted a suspicious merchant ship northeast of Brazil. When challenged by searchlight signals, the vessel failed to respond, and lookouts identified mounted guns on its bow.
Omaha opened fire, and the vessel’s crew attempted to flee in lifeboats. The Americans tried to force them back aboard with machine-gun fire, but the ship was sunk. The wreck was later identified as the German blockade runner Rio Grande. The next day, she encountered another unresponsive merchant vessel. When fired upon with warning shots, the ship exploded and began sinking. The vessel, later identified as the German blockade runner Burgenland, sank within 30 minutes.
Rescue of U-177 Survivors
On February 6, 1944, Omaha was patrolling the South Atlantic alongside USS Memphis and USS Jouett when they received orders to search for survivors of a recently sunk German U-boat. That morning, a Consolidated PB4Y-1 Liberator had destroyed U-177, catching the submarine’s crew off guard. Later that day, Omaha’s lookouts spotted a yellow life raft drifting on the open ocean. The men aboard were exhausted German sailors who had survived the destruction of their submarine.
According to one of the survivors, U-177’s commanding officer and 50 of the 64-man crew went down with the ship. The rescued sailors were taken aboard and treated for shock and exposure. They remained on board until February 15, when she docked at Bahia, Brazil.
Omaha is Deployed to Europe
In mid-1944, Omaha was reassigned to support operations in the Mediterranean and European waters. On July 4, she departed for Gibraltar, sailing alongside destroyer escorts Marts and Reybold, as well as the troop transport General W. A. Mann. Upon arrival on July 13, the convoy was joined by additional escorts before continuing to Sicily alongside the battleships USS Nevada and Arkansas.
Operation Dragoon: The Southern France Landings
On August 7, 1944, Omaha played a role in the naval bombardment of Toulon, supporting an allied task force that included the heavy cruisers USS Quincy and Augusta, the battleship USS Nevada, and the French battleship Lorraine. The cruiser fired 24 rounds at German coastal positions before enemy shore batteries retaliated. USS Quincy deployed a smoke screen to obscure Omaha’s position while she launched a barrage of 3.5-inch rockets to disrupt enemy radar.
On August 20, Omaha once again faced enemy fire while supporting Nevada, as German artillery shells splashed just 1,000 yards off her stern and 3,000 yards from her port quarter. Shortly after, the cruiser moved to Porquerolles, where she responded to distress calls from the net tender Hackberry, which was under fire from a German shore battery. Omaha fired 73 rounds of 6-inch shells at the enemy position, silencing the threat.
Following the conclusion of her role in Dragoon, Omaha departed the combat zone on August 27, heading first to Palermo before sailing to Algeria, with Cincinnati, Marblehead, Quincy, and the destroyer McLanahan. The task force left Oran on September 1 for the Atlantic.
Omaha Returns to Atlantic Patrols
After reaching Brazil on September 9, Omaha resumed her patrol duties in the South Atlantic. In December 1944, she briefly returned to the North Atlantic, escorting the troop transport General M. C. Meigs in the company of two Brazilian destroyers, Mariz e Barros and Marcilio Dias. Arriving in Gibraltar on December 4, Omaha transferred escort duties to USS Edison before making her way back to the United States. She arrived in New Jersey on December 14 and entered the New York Navy Yard for extensive repairs, ending the year in dock.
A Final Rescue of the Brazilian Cruiser Bahia
Tragedy struck on July 4, 1945, when the Brazilian cruiser Bahia exploded while conducting anti-aircraft training and sank. A gunner, having just shot down a target kite, continued firing at the descending wreckage, inadvertently hitting a rack of depth charges on the ship’s fantail, and triggering a catastrophic explosion.
The British steamer Balfe reported that 33 survivors had been pulled from the water, prompting Omaha to intercept and provide medical assistance. In total, only 44 sailors were rescued from Bahia’s 346-man crew, with seven later dying from their injuries. The investigation into the incident confirmed that the explosion had been a tragic accident rather than an enemy attack.
Decommissioning and Scrapping
Following her final rescue mission, Omaha continued patrolling the South Atlantic until August 12, 1945, two days after Japan announced its surrender. She then set sail from Recife for the last time, making port calls at San Juan and Norfolk before heading to the Philadelphia Naval Shipyard. Upon arrival, the aged cruiser was recommended her decommissioning.
USS Omaha was officially decommissioned on November 1, 1945, and removed from the Navy Register on November 28. By February 1946, she had been scrapped at the Philadelphia Naval Shipyard, marking the end of her storied service. The cruiser had served across both the Atlantic and Mediterranean theaters, from rescuing survivors at sea to engaging enemy positions in Europe. Her legacy remains a testament to the vital role of cruisers in World War II.
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