Photo #: NH 53507
USS Henderson (Transport # 1)
Gyroscopic stabilizers being installed through the side of the
ship while in dry dock at the Philadelphia Navy Yard on 13 April
1917.
"To accomplish this, the two gyro units were placed on a
barge and docked with the ship. Two plates were then removed
from the side of the ship, and the gyros were skidded down on
to their foundations inside. Each of the gyro units weighed about
30 tons." (quoted from the original 1917-vintage photo caption)
Courtesy of Sperry-Rand Corporation.
U.S. Naval Historical Center Photograph.
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