Word: pigboat
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Dates: during 1960-1969
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...cruise submerged at speeds of up to 35 knots and can operate at depths down to 1,000 ft. There are "sea-mounts"-underwater slopes-charted along her great-circle route homeward that lie only 900 ft. below the surface. Retired Navy Captain Charles N. G. Hendrix, an old "pigboat" skipper who is now a professor of oceanography at the U.S. Naval Academy, likens such subsurface navigation to the plight of "a pilot flying over the Rocky Mountains without knowing how high the highest peaks are, where they are, or even if they exist. The great-circle track...