Ballards search consisted of a series of day trips, from early
to late November. He wasnt alone aboard the 100-foot
(31-meter) expedition ship, American Islander.
Joining him were two U.S. veterans of a destroyer that
survived the attack, a Japanese submariner who participated
in the raid, a Japanese war historian, author Stephen Ambrose, and NATIONAL GEOGRAPHIC magazine writer Priit Vesilind, who composed our expedition log.
Because the search area had been long used as something of a dumping ground for planes, boats, and subs, Ballard only used his usual sonar-based search method for the first few daysthere was simply too much noise. This expedition was mostly a visual search, the eyes being video cameras affixed to two remotely operated vehicles (ROVs), Argus and Little Herc.
A map of Pearl Harbor found in a captured Japanese midget submarine
Photograph courtesy U.S. National Archives
(Photograph number 80-G413507)