In this image provided by the U.S. Navy, Seaman Apprentice Kyle Darden, from Warrenton, Va., heaves a mooring line as the guided-missile destroyer USS Michael Murphy (DDG 112) gets underway to render honors to Battleship Missouri Memorial and USS Arizona Memorial during the official ceremony for the 75th anniversary of the Japanese surrender that ended World War II, Wednesday, Sept. 2, 2020, in Honolulu, Hawaii.

A Covid-19 outbreak among sailors assigned to the USS Michael Murphy, a guided missile destroyer in the Navy's Pacific Fleet, has sidelined most of the crew and delayed its training schedule, according to two U.S. military officials and one defense official.

Nearly a quarter of the roughly 300 sailors assigned to the ship have tested positive for Covid-19, the officials said. And while many Navy ships, especially those in port, have a handful of cases among assigned sailors, the officials acknowledge that the concentration of positives from the USS Michael Murphy is higher than has been seen with other ships.