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  • CSS Virginia (USS Merrimack) Casemate Screw Ironclad Ram Warship

    The CSS Virginia brought forth a new way of waging war on the high seas - the age of the ironclad.

     Updated: 6/22/2016; Authored By JR Potts, AUS 173d AB; Content ¬©www.MilitaryFactory.com

    CSS Virginia was a 4,500-ton steam screw propelled ironclad ram warship of 12 guns. She was rebuilt in 1862 by the Confederate States Navy from the scuttled hulk of the USS Merrimack during the "War Between the States" - the American Civil War. She proved quite a handful to Union Forces but was eventually set ablaze by her Southern owners when her home port was captured by Northern troops.

    The USS Merrimack

    The Merrimack herself was a wooden frigate steam warship fitted with three masts, each rigged for sailing. She was some 275-feet long and her beam measured in at 38 feet, 6 inches. It was expected by the US Navy that sail would be the primary means of propelling the Merrimack and her steam engines would provide the necessary power when the winds would not cooperate. In 1855, the Merrimack was launched with 40 new 8- and 10-inch caliber cannons to help keep her viable in the age of steam ships. The secondary propulsion system, the steam plant, was designed by West Point graduate Robert Parrott, who happened to be the administrator of the West Point foundry. The two boilers were designed by Daniel B. Martin, an engineer-in-chief, of the burgeoning United States Navy. The engine had many initial problems - the boilers would overheat and the steam values were not wholly reliable - causing many shutdowns and forcing the crew to rely on the sail to propel the ship. The ships trim was affected when sail was used instead of steam and the unused propeller caused unnecessary drag. The solution became a brass devise called a "banjo" that allowed the propeller to be lifted out of the water, thusly reducing drag when the sails were unfurled.

    North Versus South

    On April 12th, 1861, the American Civil War started when Southern forces fired upon Fort Sumter in South Carolina. On April 14th, after shelling by a much superior force, Fort Sumter finally surrendered to the Confederates. However, Southerners were short of virtually every type of military war material when compared to the Union forces they would be facing. To make matters worse, some 70% of all factories were in North territory, especially those marked to produce war materials.

    Gosport Shipyard

    Eight days later, a military strike by the rebels was made against the Gosport Shipyard in Portsmouth, Virginia (now the Norfolk Naval Shipyard). Gosport was then the largest Union military port on the East Coast of America and was a treasure trove of materials that the hard pressed South so desperately needed to continue their planned offensives. More than 3,000 cannon of mixed calibers and a stone dry dock awaited the victor.

    The USS Cumberland received unclear orders from Washington to move out of Gosport harbor and take USS Merrimack north to protected waters. The orders also indicated that the port should be torched to prevent Federal ships and equipment from falling into the hands of the Virginia militia. The Commonwealth of Virginia moved quickly to take the port. Federal troops started retreating and burning ships as they went. Among the lot was the Merrimack. However, she was to sink before being completely burned beyond usefulness. The plans to destroy the yard had failed by the time the Confederate government took possession - all this without firing a single shot on their part.

    The South knew they could not compete with the North in terms of quantity of surface vessels currently blockading her territory. The blockade ran from Hampton Roads in Virginia, around Florida to Texas, and into the Gulf of Mexico. Stephen Mallory, Secretary of the Confederate Navy, was aware of the need for new navy ironclads to counter the wooden wall of ships posed by the Federal Navy. The three best designers in the Confederacy were John Porter - a naval ship builder - John Brooke, an ordinance expert - and William Williamson - a naval engineer. Each man reviewed the remains of the hulk that was the Merrimack.

    Rebirth of the Merrimack

    After many meetings on the vessel, it was agreed to that she was underpowered for the required task and her distinct shape made her quite the cumbersome vessel. However, the three experts knew the South had limited manufacturing capabilities and Southern foundries were not technically up speed on developing an all-new modern ironclad design. Based on the Porter Report, the Merrimack hull was selected to be rebuilt as a modernized ironclad with the Confederate government agreeing to fund the project with $172,523. This hefty sum was a sizeable portion of the entire budget of the Confederate Navy. The reborn vessel would be christened the "CSS Virgina" in honor of her new owners.

    The CSS Virginia

    The South started work on the Virginia on June 11th, 1861, and she launched some eight months later on February 17th, 1862. The Confederate Navy assigned Captain French Forrest to oversee the construction of the new ship. The basic design of ironclads produced by the South relied on a wooden casemate with rounded ends erected on top of an existing hull. After covering the casement with iron plate, it gave the vessel the appearance of an upturned bath tub. Moving the iron plate from Richmond to the Gosport Shipyard to construct the Virginia proved an impossibility due to the North's naval blockade. 725 tons of rolled iron plates, each 10 feet long, 8 inches wide and 2 inches thick were constructed shipped to the yard via rail.

    The burned hull timbers were cut down to the waterline, and a new deck and armored casemate was added. Like the mythical phoenix, Virginia would rise from the ashes. The wooden deck was replaced by 4-inch (102mm) thick iron plates. The casemate was built with 24-inch oak and pine set in multiple layers covered over by a 2x2 inch (51mm) layer of iron plating. The plating was set perpendicular to each other in an effort to affect ballistics of an incoming cannon ball - the angled surface promoted deflection. The new battery used in the Virginia consisted of 6x9-inch (229mm) Dahlgren smoothbore shell guns. 2x7-inch (178mm) rifles were mounted on bow and stern pivots, each weighting in at 14,500 pounds. The 2x6.4-inch (32-lb caliber) weighted 9,000 pounds each and were positioned along the port and starboard sides for firing broadside vollies. The 2x12-pounder (5kg) guns were placed on each side nearest the furnaces. The Virginia's designers added a 2 foot long iron ram to the bow that weighted 1,500 lbs and was 2-feet below the surface of the water - a throwback to the art of ancient warfare before there were cannons. The general thought behind this practice during the construction of the Virginia was that if she were to go head-to-head with another ironclad, her cannon might prove ineffective. As a secondary measure, the crew could count on the ram hidden below the water line to become the deciding factor in a close-in fight.

    Flag Officer Franklin Buchanan had assisted in the creation of the US Naval Academy and resigned from the US Navy when he thought his home state Maryland was going to secede from the Union. Maryland stayed in the Union but Buchanan had offered his services to the Confederacy. After helping to create the southern navy, he was promoted to Admiral of the Virginian Naval forces. Buchanan decided to take the CSS Virginia as his flag ship. Even before the Virginia was completed a plan was devised to move her out of dock to attack the U.S. Navy ships blockading the port at Hampton Roads. Interior finishing work was not completed like gun ports shutters had not been fitted while shipboard stores were limited to just two days. The rudder needed still needed work and Buchanan felt it would take at least 30 minutes for his vessel to make a 180-degree turn. The engine proved childishly finicky and ventilation inside the crew compartment was poor - at times the temperature inside the craft reached an uncomfortable 90 F degrees. However, she was a powerful warship through and through - a new breed unto herself - and seen by the South to match up well against the Union ships at Hampton Roads.

    The Battle day one: Saturday March 08, 1862

    On March 4th, 1862, Buchanan considered how best to use his Virginia. She drew 22 feet and the waters of the Elizabeth River and Hampton Roads were a maze of shallows and narrow channels. Virginia needed a wide turning radius and the Union land fortifications had shallow waters close to the forts of Newport News and Fort Monroe, making bombardment risky and running aground probable. However, Virginia still could steam in much of Hampton Roads Bay to challenge the Union ships in the blockade. Executive Officer Lt. Jones requested to delay the sailing a day or two so he could have the casements greased and the stores and powder stored properly as they had only recently arrived. Admiral Buchanan agreed and the Elizabeth River pilot was notified that the sortie to Hampton Roads would be made on Saturday, March 8th, 1862. After a slow start that morning, CSS Virginia moved from away from her dock side by 11:00AM

    As the Virginia steamed down the river with two tugs in tow - CSS Raleigh and CSS Beaufort - the surrounding inhabitants saw her smoke rising from the Elizabeth River. This was essentially her maiden voyage and her guns had never even been fired. Much of her crew felt the sortie would be an utter failure. Her tugs would not take part in the battle directly but could be called to assist the Virginia if need be.

    Virginia was ten miles from the dock at Gosport to Hampton Roads, Virginia. She made 5 knots but with the river current with her, she steamed at 7 knots - the fastest speed she would ever make during her tenure. To the casual observer, the Virginia seemingly glided effortlessly and noiselessly along the glassy surface of the river but, on board, her steering was acting erratically, keeping Chief Engineering Officer Lt. Ramsay busy. Buchanan's mind was on the USS Cumberland, only recently bestowed with new and powerful rifled guns - though in fact she had only been given one. Buchanan's decision was to immediately head for the USS Cumberland off Newport News and ram her. During the 90-minute voyage, thousands lined the river bank in support of her actions and cheered the Virginia crew. Onboard, Admiral Buchanan understood the importance of the battle if Virginia could break the blockade. Such an action could bring along the material and political support of England or France on the side of the Confederacy in the war.

    Saturday was wash day in the Union Navy and laundry hung along all over the ship's rigging. The Union blockade had 60 Union ships total of all types at Hampton Roads that morning - ferries, supply ships, repair ships, tugs, transports, tenders with five vessels being sailing warships alongside a few gun boats. As Virginia left the river and entered the bay, she steamed towards the 44-gun frigate USS Congress and the 24-gun Sloop-of-War, the USS Cumberland. Buchanan gave the order to beat to quarters and prepare for action. When Virginia appeared off Sewell Point, the Union Navy was caught off-guard and, at 12:45PM, USS Cumberland officer Lt Tom Selfridge spotted a large object in the distance belching smoke. The word was signaled that it seemed the Merrimack had reappeared as the Union Navy did not yet know the vessel's name had been changed to the Virginia. Buchanan was on the upper deck and could see the Union ships were making steam and sail due to her presence - the USS Minnesota made steam and the USS Congress and USS Cumberland raised sail and made ready for battle while the Virginia steamed ever closer.

    At 2:00PM, the Congress was 500 yards away and the gunners could see the Virginia's gun ports and opened fire with solid shot. The volley bounced off of the Virginia without any substantial damage to the structure or injury to the crew. At about 2:20pm, Virginia opened fire with her forward gun on the USS Congress and killed or wounded at least a dozen Union sailors. Soon the frigate herself fired a full 20-gun broadside against the Virginia. Cumberland Captain Smith watched the action and recorded his volley to have "bounced off the ironclad like rubber balls". Virginia replied with a broadside of her own around 300 yards out from the Congress. The shells killed or wounded most of the gun crew with shot and wood splinters making the gun deck a slaughterhouse of sorts. The paymaster onboard the Congress was the brother of Admiral Buchanan and neither was aware the other was in the battle. All onboard felt the Virginia would give the Congress another broadside but she continued past without additional firing. The Congress was burning but the crew was fighting the fires and Captain Smith felt his ship might sink so he had the tug Zouave come along side to provide aid. She ran aground in 17 feet of water watching the Virginia approach the Cumberland.

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    CSS Virginia (USS Merrimack) Technical Specifications

    Service Year: 1862
    Type: Casemate Screw Ironclad Ram Warship
    National Origin: Confederate States
    Ship Class: Virginia-class

    Structural (Crew Space, Dimensions and Weights)

    Complement (Crew): 320
    Length: 275 feet (83.82 meters)
    Beam (Width): 38.5 feet (11.73 meters)
    Draught (Height): 22 feet (6.71 meters)

    Surface Displacement: 3,200 tons

    Installed Power and Base Performance

    Engine(s): 2 x Horizontal stroke steam engines fed by 16 x furnaces and 4 x fire-box coal boilers producing 1,294shp; 1 x screw propeller.

    Surface Speed: 5 knots (6 mph)
    Operational Range: 130 nautical miles (150 miles, 241 km)

    Armament / Air Wing

    2 x 7-inch (178mm) rifle pivots
    2 x 6.4-inch (152mm) 32-pdr rifles
    6 x 9-inch (229mm) Dahlgren smoothbore cannons
    2 x 12-pdr (117mm) (5kg) deck howitzers

    Aircraft: None.

    Global Operators

    Confederate States

    Ships-in-Class (1)

    CSS Virginia