USS Passaic during gunnery tests in the Hudson River, N.Y., November 1862
Continental Iron Works|
Harlan & Hollingsworth
Reaney, Son & Archbold
Donohue, Ryan & Secor
Atlantic Iron Works
|Preceded by:||USS Monitor|
|Succeeded by:||Canonicus class|
|In commission:||25 November 1862 - 1899|
USS Weehawken, foundered 6 December 1863
USS Patapsco, mined 15 January 1865
|Length:||200 ft (61 m) overall|
|Beam:||46 ft (14 m)|
|Draught:||10 ft 6 in (3.20 m)|
|Propulsion:||2 Martin boilers, 1-shaft Ericsson vibrating lever engine, 320 ihp (235 kW)|
1 × 15 in (381 mm) smoothbore|
1 × 11 in (279 mm) smoothbore
1 × 15 in (381 mm) smoothbore
1 × 8 in (203 mm) Parrott rifle
2 × 15 in (381 mm) smoothbore
Side: 5 - 3 in (12.7 - 7.6 cm)
Turret: 11 in (27.9 cm)
Deck: 1 in (2.5 cm)
Naval architect and engineer John Ericsson designed the Passaic-class warships, drawing upon lessons learned from the first USS Monitor, which he also designed. The Passaic monitors were larger than the original Monitor and had their pilothouses atop the turret, rather than near the bow. This allowed a wider field of view and easier communications between captain, pilot and crew. The shape of the hull was an improvement with a less pronounced overhang than the Monitor. The Passaic class featured an 18 ft (5.5 m) funnel and improved ventilation.
The turret was 21 ft (6.4 m) in diameter inside with the 15 in (380 mm) gun mounted flush. As a result, the 15 in gunners could not see their targets and had to aim with the 8 in (200 mm) or 11 in (280 mm) guns. The Lehigh had her 11 inch smoothbore replaced with an 8 inch Parrot. The Passaic also had this modification by July 1863, and, eventually, all surviving members of this class had an additional 15 inch smoothbore added.
Later improvements included an additional 50 tons of deck plating over the magazines and machinery spaces as well as rings fitted around the turret and pilot houses.
Ships in class
Warships of Passaic class included:
The first ship of the class was named for the town of Passaic, New Jersey.
- Uragan-class monitor, an Imperial Russian Navy monitor type built to the plans of the American Passaic class.
- Canney, Donald L. (1993). The Old Steam Navy: The Ironclads, 1842–1885. 2. Annapolis, Maryland: Naval Institute Press. ISBN 0-87021-586-8.
- Gibbons, Tony (1989). Warships and Naval Battles of the Civil War. New York: Gallery Books. ISBN 0-8317-9301-5.
- Olmstead, Edwin; Stark, Wayne E.; Tucker, Spencer C. (1997). The Big Guns: Civil War Siege, Seacoast, and Naval Cannon. Alexandria Bay, New York: Museum Restoration Service. ISBN 0-88855-012-X.
- Silverstone, Paul H. (2006). Civil War Navies 1855-1883. The U.S. Navy Warship Series. New York: Routledge. ISBN 0-415-97870-X.
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