On 10 July, "Sentinel" was part of Task Group 86.3 tasked with landing in the Licata area. At 0430, while serving on antisubmarine patrol, "Sentinel" was attacked by German aircraft. At about 0500, a bomb exploded about 200 feet off her starboard quarter. Flares inshore of the minesweeper illuminated her for the unobservable enemy aircraft. At approximately 0510, four or five bombs burst nearby. One opened a hole one foot wide and eight feet long in her after engine room. The damage control party and the after engine room crew were seriously weakened by death and injury, and the radio room and all interior communications, except one sound-powered telephone circuit, were wrecked.