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The plans for the torpedo mechanism on the modified Casco-class monitors.
History
United States
Name	USS Naubuc
Ordered	April 1863
Builder	Perine's Union Iron Works, Williamsburg, Brooklyn
Launched	19 October 1864
Commissioned	27 March 1865
Fate	Broken up, 1875
General characteristics
Class and type	Casco-class monitor
Displacement	1,175 long tons (1,194 t)
Length	225 ft (69 m)
Beam	45 ft (14 m)
Draft	9 ft (2.7 m)
Propulsion	Screw steamer
Speed	9 knots (10 mph; 17 km/h)
Complement	69 officers and enlisted
Armament	1 × 11 in (280 mm) smoothbore pivot Dahlgren gun 1 × spar torpedo
Armor	Turret: 8 in (200 mm) Pilothouse: 10 in (250 mm) Hull: 3 in (76 mm) Deck: 3 in (76 mm)

The first USS Naubuc, laid down as a 1,175-ton light-draft monitor at Perine's Union Iron Works, Williamsburgh, NY, was launched 19 October 1864. However, as with others of her class, she was of faulty design and was found to be unseaworthy prior to her completion. She was then converted to a torpedo boat, 4th rate, with one XI-inch Dahlgren smoothbore, and arid Wood-Lay spar torpedo equipment.

Design revisions

Though the original designs for the Casco-class monitors were drawn by John Ericsson, the final revision was created by Chief Engineer Alban C. Stimers following Rear Admiral Samuel F. Du Pont's failed bombardment of Fort Sumter in 1863. By the time that the plans were put before the Monitor Board in New York City, Ericsson and Simers had a poor relationship, and Chief of the Bureau of Construction and Repair John Lenthall had little connection to the board. This resulted in the plans being approved and 20 vessels ordered without serious scrutiny of the new design. $14 million US was allocated for the construction of these vessels. It was discovered that Stimers had failed to compensate for the armour his revisions added to the original plan and this resulted in excessive stress on the wooden hull frames and a freeboard of only 3 inches. Stimers was removed from the control of the project and Ericsson was called in to undo the damage. He was forced to raise the hulls of the monitors under construction by nearly two feet and the first few completed vessels had their turrets removed and were converted to torpedo boats with the weapons listed above.

Fate

Commissioned 27 March 1865, she saw no service and on 27 June 1865 was ordered to be laid up at the New York Navy Yard. In common with nearly all her many sister ships, while at the Navy Yard she was renamed twice: Gorgon, 15 June 1869; and Minnetonka, 10 August 1869. In 1875, she was broken up by Harlan and Hollingsworth, Wilmington, Delaware.

References

 This article incorporates text from the public domain Dictionary of American Naval Fighting Ships. The entry can be found here.

• Casco-class monitors
• Ships built in Brooklyn
• Ships of the Union Navy
• Torpedo boats of the United States Navy
• 1864 ships