WASHINGTON — The captain of a U.S. Navy aircraft carrier that has more than 100 cases of coronavirus wrote a stunning plea for help to senior military officials.

In a four-page letter, first reported by the San Francisco Chronicle, Capt. Brett Crozier of the USS Theodore Roosevelt described a disastrous situation unfolding aboard the warship, a temporary home to more than 4,000 crew members.

"We are not at war. Sailors do not need to die. If we do not act now, we are failing to properly take care of our most trusted asset — our Sailors," Crozier wrote. "The spread of the disease is ongoing and accelerating."

He proposed offloading the majority of the crew, quarantining those infected, testing others for the virus and professionally cleaning the ship. He explained in his letter that by keeping the crew on the vessel the Pentagon was taking "an unnecessary risk" that "breaks faith with those Sailors entrusted to our care."

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The Pentagon did not immediately respond to CNBC's request for comment.