USS Isaac N. Seymour
| History | |
|---|---|
 United States
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| Name: | USS Isaac N. Seymour |
| Builder: | Benjamin C. Terry (Keyport, NJ) |
| Launched: | 1860 |
| Christened: | I. N. Seymour |
| Acquired: | 26 October 1861 |
| Commissioned: | (USN): Nov 1861—16 May 1865 |
| In service: | 1861—on or after 1888 |
| Renamed: |
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| Struck: | 1882 (est.) |
| Fate: | Sold foreign, 1888 |
| General characteristics | |
| Type: | Gunboat |
| Displacement: | 133 long tons |
| Length: | 100 ft (30 m) |
| Beam: | 19 ft 8 in (5.99 m) |
| Draught: | 6 ft 0 in (1.83 m) |
| Installed power: | 1 × 30-in bore, 6-ft stroke vertical beam steam engine |
| Propulsion: | Sidewheels |
| Speed: | Average 5 knots; maximum 11 knots |
| Armament: |
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USS Isaac N. Seymour, also referred to variously as Seymour, I. N. Seymour and J. N. Seymour, was a steamer acquired by the Union Navy for use as a gunboat during the American Civil War. She was used by the Navy as a littoral ship in fire support, supply and blockading roles.
Isaac N. Seymour was a wooden-hulled sidewheel steamer built by Benjamin C. Terry at Keyport, New Jersey, in 1860 as the tugboat I. N. Seymour. The ship had a displacement of 133 long tons, a length of 100 feet, beam of 19 feet 8 inches and hold depth of 7 feet 6 inches; her draft fully loaded was 6 feet 6 inches, with a light draft of 5 feet 6 inches. I. N. Seymour was powered by a vertical beam steam engine with a 30-inch bore and 6-foot stroke, built by Fletcher, Harrison & Co. of New York. The vessel had an average speed of 5 knots and a maximum speed of 11 knots.
On 26 October 1861, I. N. Seymour was purchased from Mr. Schultz by George D. Morgan on behalf of the United States Navy for the sum of $18,000. Renamed USS Isaac N. Seymour, the ship was fitted out with one 30- and one 20-pdr Parrott rifle for use as a gunboat.
Isaac N. Seymour was assigned to the North Atlantic Blockading Squadron 20 November and 3 days later was stationed in Hampton Roads, Virginia. While there she joined three other ships in engaging Confederate steamer CSS Patrick Henry and drove her back up stream.
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