By the spring of 1917, the unrestricted submarine warfare campaign—which Germany had launched at the beginning of February—had so succeeded that the entire Allied war effort was endangered.
Strong reinforcements to the Allied antisubmarine forces were desperately needed to avert defeat and needed at once.
In response to a request from the Royal Navy for the service of American antisubmarine warfare ships in European waters, the United States Navy began sending destroyers eastward across the Atlantic.

Wainwright again briefly patrolled Hampton Roads before heading for the New York Navy Yard on 14 April, and on to Boston, where she arrived two days later, to prepare for overseas duty.
On 24 April, the destroyer departed Boston in company with Wadsworth, Porter, Davis, Conyngham, and McDougal, bound for the British Isles.
This division—led by Commander Joseph K. Taussig—was the first American naval unit to be sent to Europe.
The destroyers reached Queenstown on the southern coast of Ireland on 4 May and, after fueling, began patrolling the southern approaches to Liverpool and other British ports on the coast of the Irish Sea.

Wainwright reported her first scrape with a German submarine on 11 May. She sighted an abandoned lifeboat at about 08:00.
After investigating the drifting boat for occupants and finding none, she sank the boat with gunfire.
At about 08:15, a lookout reported that a torpedo had missed the destroyer some 150 yards (140 m) astern.
Wainwright then fired several rounds from her 4-inch (102 mm) guns at what was thought to be a periscope.
The supposed submarine disappeared soon thereafter; and, despite a thorough investigation of the area, the destroyer could turn up no more evidence of the presence of a U-boat.

The summer of 1917 provided few opportunities for Wainwright to test her sub-killing techniques.
On 4 July, a member of the destroyer's crew spotted a purported periscope and soon thereafter others claimed that a torpedo was reported to have passed the ship, 5 feet (1.5 m) astern.
Wainwright depth-charged the last indicated position of the undersea raider but to no avail.
On the morning of 20 August, after Rowan brought up some oil with one of her depth charges, Wainwright dropped a couple of depth charges as she passed through the faint slick.
A few minutes later, she joined other ships in some sporadic gunfire but failed to prove that a submarine was in the area.

The fall, on the other hand, brought Wainwright increased activity.
After spending the first two weeks of September in repairs at Birkenhead, near Liverpool, she departed the yard at Laird Basin at about 07:00 on the 14th to return to Queenstown.
Three quarters of an hour into the afternoon watch, she received orders sending her to the scene of a submarine attack against an Allied merchantman some 15 nautical miles (28 km) south-southeast of Helvick Head, Ireland.
Wainwright rang up full speed, made off for the reported location, and began a search for the U-boat in conjunction with a British dirigible and other surface units.
Near the end of the second dog watch, she sighted the submarine's conning tower and bow about 6 nautical miles (11 km) off.

Wainwright charged to the attack, but the submarine submerged almost immediately.
Upon reaching the spot where the submarine had been, the warship located an oil slick and began dropping depth charges which failed to achieve positive results.
Approaching darkness and the necessity of escorting an Admiralty oiler forced Wainwright to break off her attack.
After she shepherded the oiler to safety, she returned to the area of her attack and patrolled throughout the night, but the submarine had apparently retired from the neighborhood.

Four days later, while searching for a U-boat in the area of Conigbeg Rock, the destroyer received word that the Conigbeg Lightship had rescued survivors from a fishing vessel.
Wainwright rendezvoused with the craft to interview the four seamen of the smack Our Bairns.
They revealed that the U-boat—which turned out to be UC-48—was of the latest type Germany had in acti
By the spring of 1917, the unrestricted submarine warfare campaign—which Germany had launched at the beginning of February—had so succeeded that the entire Allied war effort was endangered. Strong reinforcements to the Allied antisubmarine forces were desperately needed to avert defeat and needed at once. In response to a request from the Royal Navy for the service of American antisubmarine warfare ships in European waters, the United States Navy began sending destroyers eastward across the Atlantic.
Wainwright again briefly patrolled Hampton Roads before heading for the New York Navy Yard on 14 April, and on to Boston, where she arrived two days later, to prepare for overseas duty. On 24 April, the destroyer departed Boston in company with Wadsworth, Porter, Davis, Conyngham, and McDougal, bound for the British Isles. This division—led by Commander Joseph K. Taussig—was the first American naval unit to be sent to Europe. The destroyers reached Queenstown on the southern coast of Ireland on 4 May and, after fueling, began patrolling the southern approaches to Liverpool and other British ports on the coast of the Irish Sea.
Wainwright reported her first scrape with a German submarine on 11 May. She sighted an abandoned lifeboat at about 08:00. After investigating the drifting boat for occupants and finding none, she sank the boat with gunfire. At about 08:15, a lookout reported that a torpedo had missed the destroyer some 150 yards (140 m) astern. Wainwright then fired several rounds from her 4-inch (102 mm) guns at what was thought to be a periscope. The supposed submarine disappeared soon thereafter; and, despite a thorough investigation of the area, the destroyer could turn up no more evidence of the presence of a U-boat.
The summer of 1917 provided few opportunities for Wainwright to test her sub-killing techniques. On 4 July, a member of the destroyer's crew spotted a purported periscope and soon thereafter others claimed that a torpedo was reported to have passed the ship, 5 feet (1.5 m) astern. Wainwright depth-charged the last indicated position of the undersea raider but to no avail. On the morning of 20 August, after Rowan brought up some oil with one of her depth charges, Wainwright dropped a couple of depth charges as she passed through the faint slick. A few minutes later, she joined other ships in some sporadic gunfire but failed to prove that a submarine was in the area.
The fall, on the other hand, brought Wainwright increased activity. After spending the first two weeks of September in repairs at Birkenhead, near Liverpool, she departed the yard at Laird Basin at about 07:00 on the 14th to return to Queenstown. Three quarters of an hour into the afternoon watch, she received orders sending her to the scene of a submarine attack against an Allied merchantman some 15 nautical miles (28 km) south-southeast of Helvick Head, Ireland. Wainwright rang up full speed, made off for the reported location, and began a search for the U-boat in conjunction with a British dirigible and other surface units. Near the end of the second dog watch, she sighted the submarine's conning tower and bow about 6 nautical miles (11 km) off.
Wainwright charged to the attack, but the submarine submerged almost immediately. Upon reaching the spot where the submarine had been, the warship located an oil slick and began dropping depth charges which failed to achieve positive results. Approaching darkness and the necessity of escorting an Admiralty oiler forced Wainwright to break off her attack. After she shepherded the oiler to safety, she returned to the area of her attack and patrolled throughout the night, but the submarine had apparently retired from the neighborhood.
Four days later, while searching for a U-boat in the area of Conigbeg Rock, the destroyer received word that the Conigbeg Lightship had rescued survivors from a fishing vessel. Wainwright rendezvoused with the craft to interview the four seamen of the smack Our Bairns. They revealed that the U-boat—which turned out to be UC-48—was of the latest type Germany had in acti
USS Wainwright (DD-62)