Theodore (Dutch) Van Kirk, the navigator and last surviving crew member of the Enola Gay, the B-29 Superfortress that dropped the atomic bomb on Hiroshima in the last days of World War II, died on Monday at his home in Stone Mountain, Ga. He was 93.

His son Thomas confirmed the death.

In the predawn hours of Aug. 6, 1945, the Enola Gay, piloted by Col. Paul W. Tibbets Jr. and carrying a crew of 12, took off from Tinian in the Mariana Islands with a uranium bomb built under extraordinary secrecy in the vast Manhattan Project.

Captain Van Kirk spread out his navigation charts on a small table behind Colonel Tibbets’s seat. From that spot, at the end of a long tunnel atop the bomb bays, he took the plane’s bearings, using a hand-held sextant to guide with the stars.

When the Enola Gay reached Iwo Jima as the sun rose, it began an ascent to 31,000 feet. At 8:15 a.m. Japan time, it reached Hiroshima, a city of 250,000 and the site of an important army headquarters.