Photo #: S-584-008
Untitled Drawing Showing Estimates of Battleship Stability under Selected
Damage Conditions ... Undated
These untitled and undated drawings illustrate the effects on stability
in what appears to be a Delaware (Battleship # 28) class battleship
in the event of flooding forward from underwater damage. Two damage
conditions are considered, one with flooding limited to beneath the
protective deck, the other with flooding to the normal waterline. The
drawings depict stability margins (in terms of metacentric height, or
"GM", and flotation trim angle) for the ship following
counterflooding of the after trimming tanks under two different
initial conditions of load of consumable stores, normal and full load. This
undated plan probably dates from about 1911.
The U.S. Navy elected to eliminate armor at the extremities and upperworks
in adopting an "all-or-nothing" protection concept in 1911.
Investigations of damaged stability such as this were important in judging
alternative concepts.
Note: The original document was a blueprint (white on dark blue).
The original plan is in the 1911-1925 "Spring Styles Book".
U.S. Naval History and Heritage Command Photograph.
Online Image: 283KB; 1700 x 1240
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