MOFFETT FIELD (CBS SF) – A sailor who fell ill on a ship 900 miles off the California coast died Wednesday, hours after members of a California Air National Guard unit boarded the ship to treat the man.

The 129th Rescue Wing based out of Moffett Field in Mountain View responded to a call of a man seriously injured on the container ship Green Ridge on Tuesday. Officials said those on board the ship did not have what they needed to take care of the sailor.

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A C-130 aircraft took off from Moffett Field Tuesday afternoon. Several hours later, members of the Rescue Wing parachuted into the open ocean, boarded the vessel and tended to the patient.

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“Our Guardian Angel Team worked hard through the evening to care for the sick crew member.  Unfortunately, he passed away at approx. 6 a.m. according to a senior medical officer with the U.S. Navy,” the 129th Rescue Wing said in a written statement.

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The names of the sailor and the pararescumen are not being released at this time. Officials said the sailor was a U.S. citizen.