USS Monitor The USS " Monitor " was the first ironclad warship commissioned by the United States Navy . The ship played a central role in the Battle of Hampton Roads on 9 March 1862 , where she fought the casemate ironclad ( the former steam frigate ) to a standoff . The unique design of the ship , distinguished by its revolving turret , was quickly duplicated and established the Monitor type of warship . Designed by the Swedish - born engineer and inventor John Ericsson , and hurriedly built in Brooklyn in only 101 days , the " Monitor " presented a new concept in ship design and employed a variety of new inventions and innovations in ship building that caught the attention of the world . The impetus to build the " Monitor " was prompted by the news that the Confederates were building an ironclad warship , the " Virginia " , that could engage , virtually unchallenged , the Union ships that were blockading Hampton Roads and the James River leading to Richmond , and ultimately advance on Washington , D . C . and other cities virtually unchallenged . Before " Monitor " could reach the Roads , the Confederate ironclad had destroyed the sail frigates USS " Cumberland " and USS " Congress " and had run the steam frigate USS " Minnesota " aground . That night the " Monitor " arrived and the following morning , just before the " Virginia " was about to finish off the " Minnesota " , the new Union ironclad confronted the Confederate ship , preventing her from wreaking further destruction on the wooden Union ships . A four - hour battle ensued , both ships pounding the other with close - range cannon fire , although neither ship could destroy or seriously damage the other . This was the first - ever battle fought between two armored warships and marked a turning point in naval warfare . After the Confederates were forced to destroy the " Virginia " in early May , " Monitor " sailed up the James River to support the Army during the Peninsula Campaign . The ship participated in the Battle of Drewry ' s Bluff later that month and remained in the area giving support to General McClellan ' s forces on land until she was ordered to join the blockaders off North Carolina in December . On her way there she foundered while under tow during a storm off Cape Hatteras on the last day of the year . " Monitor " s wreck was discovered in 1973 and has been partially salvaged . Her guns , gun turret , engine and other relics are on display at the Mariners ' Museum in Newport News , Virginia . Conception . While the concept of ships protected by armor can trace itself back to before the days when Vikings hung their shields over the sides of their longship s the urgent need for iron plating on ships didn ' t arrive until the cannon was introduced to naval warfare . However , the use of heavy iron plating on the sides of warships wasn ' t practical until steam propulsion matured enough to carry its great weight . Developments in gun technology had progressed by the 1840s so that no practical thickness of wood could withstand the power of a shell . In response , the United States began construction in 1854 of a steam - powered ironclad warship , the " Stevens Battery " , but work was delayed and the designer , Robert Stevens , died in 1856 , stalling further work . Since there was no pressing need for such a ship at the time there was little demand to continue work on the unfinished vessel . However it was France who first introduced the first operational armored ships as well as the first shell guns and rifled cannons . Experience during the Crimean War of 1854 – 55 showed that armored ships could withstand repeated hits without significant damage when French ironclad floating batteries defeated Russian coastal fortifications during the Battle of Kinburn . Ericsson claimed to have sent the French Emperor Napoléon III a proposal for a monitor - type design , with a gun turret , in September 1854 , but no record of any such submission could be found in the archives of the French Ministry of the Navy ( " Ministre de la Marine " ) when they were searched by naval historian James Phinney Baxter III . The French followed those ships with the first ocean - going ironclad , the armored frigate in 1859 and the British responded in kind . The Union Navy ' s attitude towards ironclads changed quickly when it was learned that the Confederates were building one of their own . The urgency of " Monitor " s completion and deployment to Hampton Roads was driven by fears of what the ironclad " Virginia " was capable of doing , not only to Union ships but to cities along the coast and riverfronts . While the " Virginia " was being rebuilt into an ironclad the progress being made was no secret . Northern newspapers published accounts of the Confederate ' s progress and the potential naval menace on a daily basis and is what prompted the Union navy to complete and deploy the " Monitor " as soon as possible . Word of her reconstruction was confirmed in the North in late February 1862 when Mary Touvestre of Norfolk , Virginia , a freed slave who worked as a housekeeper for one of the Confederate engineers working on " Merrimack " , made her way through Confederate lines with news that the Confederates were building an ironclad warship at the naval shipyard in Norfolk . Concealed in her dress was a message from a Union sympathizer who worked in the Navy Yard warning that the former " Merrimack " , renamed " Virginia " by the Confederates , was nearing completion . Upon her arrival in Washington Mary managed to meet with Secretary of the Navy Gideon Welles and informed him that the Confederate ' s were nearing completing their ironclad , which surprised Welles . Convinced by the papers Mary was carrying he had production of the " Monitor " sped up as much as was possible . Approval . After the United States received word of the construction of the " Virginia " , Congress appropriated $ 1 . 5 million on 3 August 1861 to build one or more armored steamships . It also ordered the creation of a board to inquire into the various designs proposed for armored ships . The U . S . Navy advertised for proposals for " iron - clad steam vessels of war " on 7 August and Welles appointed three senior officers as the Ironclad Board the following day . Their task was to " examine plans for the completion of iron - clad vessels " and consider its costs . Ericsson originally made no submission to the board , but became involved when Cornelius Bushnell , the sponsor of the proposal that became the armored sloop , needed to have his design reviewed by a naval constructor . The board required a guarantee from Bushnell that his ship would float despite the weight of its armor and Cornelius H . DeLamater of New York City recommended that Bushnell consult with his friend Ericsson . The two first met on 9 September and again on the following day , after Ericsson had time to evaluate " Galena " s design . During this second meeting Ericsson showed Bushnell a model of his own design , the future " Monitor " , derived from his 1854 design . Bushnell got Ericsson ' s permission to show the model to Welles , who told Bushnell to show it to the board . Upon review of Ericsson ' s unusual design , the board was skeptical , concerned it would not float , especially in rough seas , and rejected it . President Lincoln , who had also examined the design , overruled them . Ericsson assured the board his ship would float exclaiming , " The sea shall ride over her and she shall live in it like a duck " . On 15 September , after further deliberations , the board accepted Ericsson ' s proposal . The Ironclad Board evaluated 17 different designs , but recommended only three for procurement on 16 September , including Ericsson ' s " Monitor " design . The three ironclad ships selected differed substantially in design and degree of risk . The " Monitor " was the most innovative design by virtue of its low freeboard , shallow - draft iron hull , and total dependence on steam power . The riskiest element of its design was its rotating gun turret , something that had not previously been built or tested by any navy . Ericsson ' s guarantee of delivery in 100 days proved to be decisive in choosing his design despite the risk involved . Design and description . " Monitor " was an unusual vessel in almost every respect and was sometimes sarcastically described by the press and other critics as " Ericsson ' s folly " , " cheesebox on a raft " and the " Yankee cheesebox " . The most prominent feature on the vessel was a large cylindrical gun turret mounted amidships above the low - freeboard upper hull , also called the " raft " . This extended well past the sides of the lower , more traditionally shaped hull . A small armored pilot house was fitted on the upper deck towards the bow , however , its position prevented the " Monitor " from firing her guns straight forward . One of Ericsson ' s prime goals in designing the ship was to present the smallest possible target to enemy gunfire . The ship was long overall , had a beam of and had a maximum draft of . " Monitor " had a tonnage of 776 tons burthen and displaced . Her crew consisted of 49 officers and enlisted men . The ship was powered by a single - cylinder horizontal vibrating - lever steam engine , also designed by Ericsson , which drove a propeller , whose shaft was nine inches in diameter . The engine used steam generated by two horizontal fire - tube boiler s at a maximum pressure of . The engine was designed to give the ship a top speed of , but " Monitor " was slower in service . The engine had a bore of and a stroke of . The ship carried of coal . Ventilation in the " Monitor " was supplied by two centrifugal blowers near the stern , each of which was powered by steam engine . One fan circulated air throughout the ship , but the other one forced air through the boilers , which depended on this forced draught . Leather belts connected the blowers to their engines and they would stretch when wet , often disabling the fans and boilers . The ship ' s pumps were steam operated and water would accumulate in the ship if the pumps could not get enough steam to work . " Monitor " s turret measured in diameter and high , constructed with of armor ( 11 inches in front at the gun ports ) rendering the overall vessel somewhat top heavy . Its rounded shape helped to deflect cannon shot . A pair of donkey engine s rotated the turret through a set of gears ; a full rotation was made in 22 . 5 seconds during testing on 9 February 1862 . Fine control of the turret proved to be difficult as the engine would have to be placed in reverse if the turret overshot its mark or another full rotation could be made . The only way to see out of the turret was through the gun ports ; when the guns were not in use , or withdrawn for reloading during battle , heavy iron port stoppers would swing down into place to close the gunports . Including the guns , the turret weighed approximately ; the entire weight rested on an iron spindle that had to be jacked up using a wedge before the turret could rotate . The spindle was in diameter which gave it ten times the strength needed in preventing the turret from sliding sideways . When not in use , the turret rested on a brass ring on the deck that was intended to form a watertight seal . In service , however , this proved to leak heavily , despite caulking by the crew . The gap between the turret and the deck proved to be a problem as debris and shell fragments entered the gap and jammed the turrets of several s , which used the same turret design , during the First Battle of Charleston Harbor in April 1863 . Direct hits at the turret with heavy shot also had the potential to bend the spindle , which could also jam the turret . To gain access to the turret from below , or to hoist up powder and shot during battle , the turret had to rotate facing directly to starboard , which would line up the entry hatch in the floor of the turret with an opening in the deck below . The roof of the turret was lightly built to facilitate any needed exchange of the ship ' s guns and to improve ventilation , with only gravity holding the roof plates in place . The turret was intended to mount a pair of smoothbore Dahlgren gun s , but they were not ready in time and guns were substituted . Each gun weighed approximately . " Monitor " s guns used the standard propellant charge of specified by the 1860 ordnance for targets " distant " , " near " , and " ordinary " , established by the gun ' s designer Dahlgren himself . They could fire a round shot or shell up to a range of at an elevation of + 15° . The top of the armored deck was only about above the waterline . It was protected by two layers of wrought iron armor . The sides of the " raft " consisted of three to five layers of iron plates , backed by about of pine and oak . Three of the plates extended the full height of the side , but the two innermost plates did not extend all the way down . Ericsson originally intended to use either six 1 - inch plates or a single outer plate backed by three plates , but the thicker plate required too much time to roll . The two innermost plates were riveted together while the outer plates were bolted to the inner ones . A ninth plate , only thick and wide , was bolted over the butt joint s of the innermost layer of armor . Glass porthole s in the deck provided natural light for the interior of the ship ; in action these were covered by iron plates . After the duel between the two ironclads at Hampton Roads there was concern by some Navy officials who witnessed the battle that the " Monitor " design might allow for easy boarding by the Confederates . In a letter dated 27 April 1862 Lieutenant Commander O . C . Badger wrote to Lieutenant H . A . Wise , Assistant Inspector of Ordnance , advising the use of " liquid fire " , scalding water from the boiler through hoses and pipes , sprayed out via the vents and pilothouse window , to repel enemy boarders . Wise who was aboard and inspected the " Monitor " after the battle responded in a letter of 30 April 1862 : “ " With reference to the Monitor , the moment I jumped on board of her after the fight I saw that a steam tug with twenty men could have taken the upper part of her in as many seconds . . . I hear that hot water pipes are arranged so as to scald the assailants when they may dare to set foot on her . " ” The chance to employ such a tactic never arose . There are conflicting accounts as to whether such an anti - personnel provision was installed . Construction . Commodore Joseph Smith , Chief of the Bureau of Yards and Docks , sent Ericsson formal notice of the acceptance of his proposal on 21 September 1861 . Six days later , Ericsson signed a contract with Bushnell , John F . Winslow and John A . Griswold which stated that the four partners would equally share in the profits or the losses incurred by the construction of the ironclad . There was one major delay , however , over the signing of the actual contract with the government . Welles insisted that if " Monitor " didn ' t prove to be a " complete success " , the builders would have to refund every cent to the government . Winslow balked at this draconian provision and had to be persuaded by his partners to sign after the Navy rejected his attempt to amend the contract . The contract was finally signed on 4 October for a price of $ 275 , 000 to be paid in installments as work progressed . Preliminary work had begun well before that date , however , and Ericsson ' s consortium contracted with Thomas R . Rowland of the Continental Iron Works at Greenpoint , Brooklyn on 25 October for construction of the " Monitor " s hull , with her keel being laid on that same day . The turret was built and assembled at the Novelty Iron Works in Manhattan , disassembled and shipped to Greenpoint where it was reassembled . The ship ' s steam engines and machinery were constructed at the DeLamater Iron Works , also in Manhattan . Chief Engineer Alban C . Stimers , who once served aboard the " Merrimack " , was appointed Superintendent of the ship while she was undergoing construction . Although never formally assigned to the crew , he remained aboard her as an inspector during her maiden voyage and battle . Construction progressed in fits and starts , plagued by a number of short delays in the delivery of iron and occasional shortages of cash , but they did not significantly delay the ship ' s progress by more than a few weeks . The hundred days allotted for her construction passed on 12 January , but the Navy chose not to penalize the consortium . The name " Monitor " , meaning " one who admonishes and corrects wrongdoers " , was proposed by Ericsson on 20 January 1862 and approved by Assistant Secretary of the Navy Gustavus Fox . While Ericsson stood on its deck in defiance of all his critics who thought she would never float , the " Monitor " was launched on 30 January 1862 to the cheers of the watching crowd , even those who had bet that the ship would sink straight to the bottom , and commissioned on 25 February . Even before the " Monitor " was commissioned , she ran an unsuccessful set of sea trials on 19 February . Valve problems with the main engine and one of the fan engines prevented her from reaching the Brooklyn Navy Yard from Greenpoint and she had to be towed there the next day . These issues were easily fixed and the " Monitor " was ordered to sail for Hampton Roads on 26 February , but her departure had to be delayed one day to load ammunition . On the morning of 27 February the ship entered the East River preparatory to leaving New York , but proved to be all but unsteerable and had to be towed back to the navy yard . Upon examination , the steering gear controlling the rudder had been improperly installed and Rowland offered to realign the rudder , which he estimated to take only a day . Ericsson , however , preferred to revise the steering gear by adding an extra set of pulley s as he believed it would take less time . His modification proved to be successful during trials on 4 March . Gunnery trials were successfully performed the previous day , although Stimers twice nearly caused disasters as he did not understand how the recoil mechanism worked on Ericsson ' s carriage for the 11 - inch guns . Instead of tightening them to reduce the recoil upon firing , he loosened them so that both guns struck the back of the turret , fortunately without hurting anybody or damaging the guns . Ericsson ' s revolutionary turret , although not without flaws , was a unique concept in gun mounting that was soon adapted and used on naval ships around the world . His " Monitor " design employed over forty patented inventions and was completely different than any other naval warship of the time . Since " Monitor " was an experimental craft , needed for battle as soon as possible , hurriedly constructed and almost immediately put to sea , a number of problems were discovered during her maiden voyage to Hampton Roads and during the battle there . Yet " Monitor " was still able to challenge " Virginia " and prevent her from further destroying the remaining ships in the Union flotilla blockading Hampton Roads . During the " boom time " of the Civil War , Ericsson could have made a fortune with his inventions used in the " Monitor " , but instead gave the U . S . government all his " Monitor " patent rights saying it was his " contribution to the glorious Union cause " . Crew . " Monitor " s crew were all volunteers and totaled 49 officers and enlisted men as the warship required ten officers : A commander , an executive officer , four engineers , one medical officer , two masters and a paymaster . Before Worden was allowed to select , assemble , and commit a crew to " Monitor " , the vessel had to be completed . The original officers at the time of " Monitor " s commissioning were : Four of the officers were of the line and responsible for the handling of the vessel and operation of guns during battle , while the engineering officers were considered a class unto themselves . In " Monitor " s turret , Greene and Stoddert supervised loading and firing of the two 11 - inch Dahlgrens . Each gun was crewed by eight men . Thus , during battle , at least 18 men were present in the turret . In Worden ' s report of 27 January 1862 to Welles , he stated he believed 17 men and 2 officers would be the maximum number in the turret that allowed the crew to work without getting in each other ' s way . " Monitor " also required petty officers : among them was Daniel Toffey , Worden ' s nephew . Worden had selected Toffey to serve as his Captain ' s Clerk . Two African Americans were also among the enlisted men in the crew . During " Monitor " s service , commanders and several officers were replaced because of injuries or for other reasons . Living quarters for the senior officers consisted of eight separate well - furnished cabins , each provided with a small oak table and chair , an oil lamp , shelves and drawers and a canvas floor covering covered with a rug . The entire crew were given goat - skin mats to sleep on . Lighting for each living area was provided by small skylights in the deck above , which were covered by an iron hatch during battle . The officer ' s wardroom was located forward of the berth deck where officers would eat their meals , hold meetings or socialize during what little spare time they had . It was well furnished with an oriental rug , a large oak table and other such items . Ericsson had personally paid for the costs of all the officer ' s furnishings . Many details of " Monitor " s history and insights of everyday crew life have been discovered from correspondence sent from the various crew members to family and friends while serving aboard the ironclad . In particular the correspondence of George S . Geer , who sent more than 80 letters , often referred to as " The Monitor Chronicles " , to his wife Martha during the entire time of " Monitor " s service provide many details and insights into every chapter of the ironclad ' s short lived history , offering a rare perspective of a sailor ' s experience on the naval front during the Civil War . The letters of Acting Paymaster William F . Keeler to his wife Anna also corroborate many of the accounts of affairs that took place aboard the " Monitor " . The letters of Geer and Keeler are available for viewing and are housed at the Mariners ' Museum in Virginia . Other crew members were interviewed later in life , like Louis Stodder , who was the last surviving crew member of the " Monitor " and lived well into the 20th century . Service . On 6 March , the ship departed New York bound for Fort Monroe , Virginia , towed by the ocean - going tug " Seth Low " and accompanied by the gunboats and . Worden , not trusting the seal between the turret and the hull , and ignoring Ericsson ' s advice , wedged the former in the up position and stuffed oakum and sail cloth in the gap . Rising seas that night washed the oakum away and water poured underneath the turret , as well as through the hawsepipe , various hatches , ventilation pipes , and the two funnels , so that the belts for the ventilation and boiler fans loosened and fell off and the fires in the boilers were nearly extinguished over the course of the next day ; this created a toxic atmosphere in the engine room that knocked out most of the engine - room crew . First Assistant Engineer Isaac Newton ordered the engine room abandoned and had the able - bodied crew drag the afflicted engine room hands to the top of the turret where the fresh air could revive them . Both Newton and Stimers worked desperately to get the blowers to work , but they too succumbed to the noxious fumes and were taken above . One fireman was able to punch a hole in the fan box , drain the water , and restart the fan . Later that night , the wheel ropes controlling the ship ' s rudder jammed , making it near impossible to control the ship ' s heading in the rough seas . " Monitor " was now in danger of foundering , so Worden signaled " Seth Low " for help and had " Monitor " towed to calmer waters closer to shore so she was able to restart her engines later that evening . She rounded Cape Charles around 3 : 00 pm on 8 March and entered Chesapeake Bay , reaching Hampton Roads at 9 : 00 pm , well after the first day ' s fighting in the Battle of Hampton Roads had concluded . Battle of Hampton Roads . On 8 March 1862 , CSS " Virginia " , commanded by Commander Franklin Buchanan , was ready to engage the Union flotilla blockading the James River . " Virginia " was powered by " Merrimack ' s " original engines , which had been condemned by the U . S . Navy . The ship ' s chief engineer , H . Ashton Ramsay , served in " Merrimack " before the Civil War broke out and knew of the engine ' s unreliability , but Buchanan pushed forward undaunted . " Virginia " attacked the Union blockading squadron in Hampton Roads , Virginia , destroying the sail frigates " Cumberland " and " Congress " . Early in the battle , the steam frigate ran aground while attempting to engage " Virginia " , and remained stranded throughout the battle . " Virginia " , however , was unable to attack " Minnesota " before daylight faded . That day Buchanan was severely wounded in the leg and was relieved of command by Catesby ap Roger Jones . After the initial battle Washington was immediately informed of the dire situation by telegraph . Many were now concerned the " Virginia " would put to sea and begin bombarding cities such as New York while others feared she would ascend the Potomac River and attack Washington . In a meeting between President Lincoln , Secretary of War Edwin M . Stanton , Secretary Welles and other senior naval officers inquiries were made about " Monitor " s ability to stop " Virginia " s prospect of further destruction . When the temperamental Stanton learned that " Monitor " had only two guns he expressed contempt and rage as he paced back and forth , further increasing the anxiety and despair among members of the meeting . Assurances from Admiral Dahlgren and other officers that the " Virginia " was too massive to effectively approach Washington and that " Monitor " was capable of the challenge offered him no consolation . After further deliberations Lincoln was finally assured but Stanton remained almost in a state of terror and sent telegrams to various governors and mayors of the coastal states warning them of the danger . Subsequently Stanton approved a plan to load some sixty canal boats with stone and gravel and sink them in the Potomac , but Welles was able to convince Lincoln at the last moment that such a plan would only prevent " Monitor " and other Union ships from reaching Washington and that the barges should only be sunk if and when the Virginia was able to make her way up the Potomac . About 9 : 00 pm , " Monitor " finally arrived on the scene to only discover the destruction that the " Virginia " had already wrought on the Union fleet . Worden was ordered upon reaching Hampton Roads to weigh anchor alongside the USS " Roanoke " and report to Captain John Marston where Worden was briefed of the situation and received further orders to protect the grounded " Minnesota " . By midnight , under the cover of darkness , " Monitor " quietly pulled up alongside and behind the " Minnesota " and waited . Duel of the ironclads . The next morning at about 6 : 00 am the " Virginia " , accompanied by the " Jamestown " , " Patrick Henry " and the " Teaser " , got underway from Sewell ' s Point to finish off " Minnesota " and the rest of the blockaders , but were delayed sailing out into Hampton Roads because of heavy fog until about 8 : 00 am . In the " Monitor " Worden was already at his station in the pilot house while Greene took command of the turret . Samuel Howard , Acting Master of the " Minnesota " who was familiar with Hampton Roads with its varying depths and shallow areas , had volunteered to be the pilot the night before and thus was accepted , while Quarter Master Peter Williams steered the vessel throughout the battle . The speaking tube used to communicate between the pilothouse and the turret had broken early in the action so Keeler and captain ' s clerk Daniel Toffey had to relay commands from Worden to Greene . As the " Virginia " was approaching she began firing at the " Minnesota " from more than a mile away , a few of her shells hitting the vessel . When the firing was heard in the distance , Greene sent paymaster Keeler to the pilot house for permission to open fire as soon as possible where Worden ordered , " Tell Mr . Green not to fire till I give the word , to be cool and deliberate , to take sure aim and not waste a shot . " " Monitor " , to the surprise of " Virginia " s crew , had emerged from behind the " Minnesota " and went straight for the approaching " Virginia " and positioned herself between her and the grounded " Minnesota " , preventing the Confederate ironclad from further engaging the vulnerable wooden ship at close range . At 8 : 45 am Worden gave the order to fire where Greene fired the first shots of the battle between the two ironclads which harmlessly deflected off the Confederate ironclad . During the battle the " Monitor " fired solid shot , about once every eight minutes , while the " Virginia " fired shell exclusively . The ironclads generally fought at close range for about four hours , ending at 12 : 15pm , ranging from a few yards to more than a hundred . Both ships were constantly in motion , maintaining a circular pattern . Because of " Virginia " s weak engines , massive size and weight and with a draft of , she was slow and difficult to maneuver , taking her half an hour to complete a 180 - degree turn . During the engagement , " Monitor " s turret began to malfunction , making it extremely difficult to turn and stop at a given position , so the crew simply let the turret continuously turn and fired their guns " on the fly " as they bore on " Virginia " . Several times , " Monitor " received direct hits on the turret , causing some bolts to violently shear off and ricochet around inside . The deafening sound of the impact stunned some of the crew , causing nose and ear bleeding . However , neither vessel was able to sink or seriously damage the other . At one point , " Virginia " attempted to ram , but only struck " Monitor " a glancing blow and did no damage . It did , however , aggravate the damage to " Virginia " s bow from when she had previously rammed " Cumberland " . " Monitor " was also unable to do significant damage to " Virginia " , possibly due to the fact that her guns were firing with reduced charges , on advice from Commander John Dahlgren , the gun ' s designer , who lacked the " preliminary information " needed to determine what amount of charge was needed to " pierce , dislocate or dislodge iron plates " of various thicknesses and configurations . During the battle Stodder was stationed at the wheel that controlled the turning of the turret but at one point when he was leaning against its side the turret received a direct hit directly opposite to him which knocked him clear across the inside , rendering him unconscious , at where he was taken below to recover and relieved by Stimers . The two vessels were pounding each other at such close range , they managed to collide with one another at five different times . By 11 : 00 am " Monitor " ' s supply of shot in the turret had been used up . With one of the hatches to the gun ports damaged and jammed shut she hauled off to shallow waters to resupply the turret and effect repairs to the damaged hatch , which could not be repaired . During the lull in the battle Worden climbed through the gun port out onto the deck to get a better view of the overall situation . " Virginia " , seeing " Monitor " turn away turned her attention to the " Minnesota " and fired shots that set the wooden vessel ablaze , also destroying the nearby tugboat " Dragon " . When the turret was resupplied with ammunition Worden returned to battle with only one gun in operation . Towards the end of the engagement , Worden directed Williams to steer the " Monitor " around the stern of Confederate ironclad , where Lieutenant Wood fired his 7 - inch Brooke gun at " Monitor " s pilothouse , striking the forward side directly beneath the sight hold , cracking the structural " iron log " along the base of the narrow opening just as Worden was peering out . Worden was heard to have cried out , " My eyes — I am blind ! " Others in the pilothouse had also been hit with fragments and were also bleeding . Temporarily blinded by shell fragments and gunpowder residue from the explosion and believing the pilothouse to be severely damaged , Worden ordered Williams to sheer off into shallow water , where " Virginia " with her deep draft could not follow . There the " Monitor " drifted ideally for about twenty minutes . At the time the pilothouse was struck Worden ' s injury was only known to those in the pilothouse and immediately nearby . With Worden severely wounded , command passed to the Executive Officer , Samuel Greene . Taken by surprise and confused he hesitated briefly and was undecided as to what action to take next , but after assessing the damage soon ordered " Monitor " to return to the battle area . Shortly after the " Monitor " withdrew the " Virginia " had run aground at which time Commander Jones came down from the spar deck only to find the gun crews not returning fire . Jones demanded to know why and was briefed by Lieutenant Eggleston that powder was low and precious and given the " Monitor " s resistance to shot after two hours of battle , maintained that continued firing at that point would only be a waste of ammunition . The " Virginia " soon managed to break away and headed back towards Norfolk , believing that the " Monitor " had withdrawn from battle . Greene , now in command , did not pursue the " Virginia " and , like Worden , was under orders to stay with and protect the " Minnesota " , an action for which he was later criticized . As a result of the duel between the two ironclads , " Monitor " had been struck twenty - two times , including nine hits to the turret and two hits to the pilothouse . She had managed to fire forty - one shots from her pair of Dahlgren guns . " Virginia " had sustained ninety - seven indentations to her armor from fire received from the " Monitor " and other ships . Neither ship had sustained any significant damage , and there were no casualties incurred on either side . In the opinion of " Virginia " s commander Jones and her other officers , the " Monitor " could have sunk their ship had she hit the vessel at the waterline . After an informal war council with his officers , " Virginia " s captain decided to return to Norfolk for repairs . " Monitor " arrived back on the scene as " Virginia " was leaving . Greene , under orders to protect " Minnesota " , did not pursue . Tactically , the battle between these two ships was considered one of the most decisive of the Civil War while largely considered a draw , though it could be argued " Virginia " did slightly more damage . " Monitor " did successfully defend " Minnesota " and the rest of the U . S . blockading force , while " Virginia " was unable to complete the destruction she started the previous day . Strategically , nothing had changed : the Federals still controlled Hampton Roads and the Confederates still held several rivers and Norfolk , making it a strategic victory for the North . The battle of the ironclads led to what was referred to as " Monitor fever " in the North . During the course of the war other and improved monitor designs emerged with a total of 60 ironclads built . Events after the battle . Immediately following the battle Stimers telegraphed Ericsson , congratulating and thanking him for making it possible to confront the Confederate ironclad and for " saving the day " . No sooner than " Monitor " had weighed anchored , numerous small boats and spectators on shore flocked around the ship to congratulate the crew for what they regarded as their victory over the " Virginia " . Assistant Secretary Fox , who observed the entire battle from aboard " Minnesota " came aboard " Monitor " and jokingly told her officers , " " Well gentlemen , you don ' t look as though you just went through one of the greatest naval conflicts on record " " . A small tug soon came alongside and the blinded Worden was brought up from his cabin while crew members and spectators cheered . He was taken directly to Fort Monroe for preliminary treatment , then to a hospital in Washington shortly thereafter . Engineers Stimers and Newton soon began repairing the damage to the pilot house and reconfigured the sides from an upright position to a slope of thirty degrees to deflect shot . During this time , Mrs . Worden personally brought news of her husband ' s progress and recovery and was optimistic , informing the crew his eyesight would soon return but he would be laid up for some time . She also informed them President Lincoln had personally paid Worden a visit extending his gratitude . However Worden was later taken to his summer home in New York and remained unconscious for three months but never fully recovered . The Confederates were also celebrating what they considered a victory , as crowds of spectators gathered along the banks of the Elizabeth River , cheering and waving flags , handkerchiefs and hats as " Virginia " , displaying the captured ensign of the " Congress " , passed along up the river . The Confederate government was ecstatic and immediately promoted Commander Buchanan to Admiral . Both the Union and Confederacy soon came up with plans for defeating the other ' s ironclad . Oddly , these did not depend on their own ironclads . The Union Navy chartered a large ship ( the sidewheeler ) and reinforced her bow with steel specifically to be used as a naval ram , provided " Virginia " steamed far enough out into Hampton Roads . On 11 April the " Virginia " accompanied by a number of gunboats steamed into Hampton Roads to Sewell ' s Point at the southeast edge , almost over to Newport News , in a challenge to " Monitor " in an attempt to lure the Union ironclad into battle . " Virginia " fired a few shots ineffectively at very long range , however , while the " Monitor " returned fire , she stayed near Fort Monroe , ready to fight if " Virginia " came to attack the Federal force congregated there . Furthermore , " Vanderbilt " was in position to ram " Virginia " if she approached the fort . " Virginia " did not take the bait . In a further attempt to entice " Monitor " closer to the Confederate side , so she could be boarded , the James River Squadron moved in and captured three merchant ships , the brigs " Marcus " and " Sabout " , and the schooner " Catherine T . Dix " . These had been grounded and abandoned when they sighted " Virginia " entering the Roads . Their flags were then hoisted " Union - side down " to taunt " Monitor " into a fight as they were towed back to Norfolk . In the end both sides had failed to provoke a fight on their terms . The Confederate Navy originally had devised a plan where the James River Squadron would swarm the " Monitor " with a party of men with the intention of capturing the vessel by boarding and disabling her by using heavy hammers to drive iron wedges under and disabling the turret and by covering the pilot house with a wet sail effectively blinding the pilot . Others would throw combustibles down the ventilation openings and smoke holes . At one point Jones made such an attempt to board the " Monitor " but she managed to slip away around the stern of " Virginia " in time . A second meeting occurred on 8 May , when " Virginia " came out while " Monitor " and four other Federal ships bombarded Confederate batteries at Sewell ' s Point . The Federal ships retired slowly to Fort Monroe , hoping to lure " Virginia " into the Roads . She did not follow , however , and after firing a gun to windward as a sign of contempt , anchored off Sewell ' s Point . Later when Confederate forces abandoned Norfolk on 11 May 1862 , they were forced to destroy " Virginia " . Battle of Drewry ' s Bluff . After the destruction of " Virginia " , " Monitor " was free to assist the Union Army and General McClellan ' s campaign against Richmond . As the Navy always gave command to officers based on seniority Greene was passed over the day after the battle and was replaced with Lieutenant Thomas O . Selfridge . Two days later , Selfridge was in turn relieved by Lieutenant William Nicholson Jeffers on 15 May 1862 . " Monitor " was now part of a flotilla under the command of Admiral John Rodgers aboard " Galena " , along with three other gunboats which steamed up the James River and engaged the Confederate batteries at Drewry ' s Bluff . The force had instructions to coordinate their efforts with McClellan ' s forces on land and push on towards Richmond to bombard the city into surrender if possible . Without any assistance , the task force got within of the Confederate capital but could not proceed further because of sunken vessels and debris placed in the river blocking further passage . There were also artillery batteries at Fort Darling overlooking and guarding the approach , along with other heavy guns and sharpshooters positioned along the river banks . The fort was strategically situated on the west bank of the James River atop of a bluff some above and overlooking the bend in the river . " Monitor " was of little help in the assault because the confinement and small gun ports of her turret would not allow her to elevate her guns sufficiently to engage the Confederate batteries at close range , so she had to fall back and fire at a greater distance , while the other gunboats were unable to overcome the fortifications on their own . After " Monitor " received only a few hits , without incurring any damage , the Confederates , many former crew members of " Virginia " well aware of her ability to withstand cannon shot even at close range , concentrated their guns on the other ships , especially " Galena " , which sustained considerable damage and loss of crew members . After a near four - hour artillery duel and sustaining numerous hits overall , the flotilla was unable to neutralize the fortification and had to turn back . Not a single Union ship reached Richmond until near the end of the war , when the city was finally evacuated by the Confederates . After the battle at Drewry ' s Bluff " Monitor " remained on the James River providing support , along with the " Galena " and other gunboats , to McClellan ' s troops at various points along the river including Harrison ' s Landing Repairs and refit . In September Captain John P . Bankhead received orders to take command of the " Monitor " , relieving commander Thomas Stevens , and was sent to Hampton Roads to take charge of the vessel . Shortly after command was passed on to Bankhead " Monitor " s engines and boilers were condemned by a board of survey which recommended that they be overhauled completely . On 30 September the ironclad was sent to the Washington Navy Yard for repairs arriving there on 3 October 1862 . Upon arrival at Washington the " Monitor " and crew were greeted by a crowd of thousands of cheering admirers who came to see the ship that " saved the nation " . The " Monitor " now being a premier tourist attraction the crowd was soon allowed on board to tour the vessel . During this time the vessel was picked clean of artifacts for souvenirs by the touring civilians that came aboard . When Stodder and others came to close up the dock and ship one evening Stodder noted , " When we came up to clean that night there was not a key , doorknob , escutcheon – there wasn ' t a thing that hadn ' t been carried away . " Before " Monitor " was put into dry dock for repairs President Lincoln , Navy Secretary Fox , various officials and a few of Worden ' s close friends arrived to ceremoniously review the vessel and pay respect to the crew and former commander Worden , who after a long and partial recovery arrived for the occasion . Entire regiments were also directed to come by the naval yard and review the ship and honor the crew . The " Monitor " s crew assembled on deck in formation with their officers in front , while Lincoln , Fox and other guests stood near the turret . When Worden , with part of his face blacked from the wounds he received at Hampton Roads , came aboard , the heavy guns in the navy yard were fired in . President Lincoln came forward and greeted Worden and then introduced him to some of the others . After Lincoln ' s formal greeting the crew swarmed around Worden and embraced and shook hands with their former commander and thanked God for his recovery and return . Worden called each of them by name and spoke friendly to and complimented each of them personally . When order was restored the President gave a short speech about Worden ' s career . At Fox ' s request , Worden gave a speech to the gathering about his voyage from New York to Hampton Roads , the trials they were faced with along the way and of the epic battle between the " Monitor " and " Virginia " , while paying tribute to many of the officers and men involved . In closing he gave special thanks to Ericsson , Lincoln , Welles and all who made construction of the " Monitor " possible . While the " Monitor " was undergoing repairs her crew was put aboard the USS " King Philip " and were eventually granted a furlough by Bankhead who himself went on leave . For approximately six weeks the vessel remained in drydock while her bottom was scraped clean of barnacles and other sea fowl while the engines and boilers were overhauled and the entire vessel cleaned , painted , and a number of improvements made , including an iron shield around the top of the turret . To make the vessel more seaworthy a funnel shaped smokestack was placed over the smoke outlet while taller fresh air vents were installed . The berth deck below was also enlarged and raised by removing some of the side storerooms and placing them below , thus reducing the height of the interior which now barely allowed the crew to stand upright . Several cranes were also added while interior improvements were made making the confining environment more livable . A large blower that operated with its own engine was installed which drew fresh air down through the pilothouse . During this time the two Dahlgren guns were each engraved with large letters , " MONITOR & MERRIMAC – WORDEN " and " MONITOR & MERRIMAC – ERICSSON " , respectively . Additional iron plates were installed covering where dents were made during the previous battles . Each plate was inscribed with the name of the source from where the shell causing the dent was made . i . e . " Merrimack , Fort Darling " , etc . Stanchions were also installed around the perimeter of the freeboard with a rope strung through each making it safer to walk about the deck amid stormy weather and rough seas . " Monitor " was finally taken out of drydock on 26 October . By November the ship was fully repaired and refitted , resupplied and ready to return to service . Final voyage . On 24 December 1862 , orders were issued directing " Monitor " to Beautfort , North Carolina to join USS " Passaic " and USS " Montauk " for a joint Army - Navy expedition against Wilmington , North Carolina , where she would join the blockade off Charleston . The orders were received by the crew on Christmas Day , some of whom were aboard the " Monitor " on her harrowing journey from New York to Hampton Roads in March , and were not pleased with the prospect of taking to the high seas once again . Dana Green remarked " I do not consider this steamer a sea going vessel " . The crew celebrated Christmas aboard the " Monitor " while berthed at Hampton Roads in what was described as a most merry fashion , while many other celebrations were occurring along the shore . The ship ' s cook was paid one dollar to prepare a meal for the crew befitting the day ; it was received with mixed opinion . That day , " Monitor " was made ready for sea , her crew under strict orders not to discuss the impending voyage with anyone , but bad weather delayed her departure until 29 December . While the design of " Monitor " was well - suited for river combat , her low freeboard and heavy turret made her highly unseaworthy in rough waters . Under the command of John P . Bankhead , " Monitor " put to sea on 31 December , under tow from USS " Rhode Island " , when a heavy storm developed off Cape Hatteras , North Carolina . Using chalk and a blackboard , Bankhead wrote messages alerting the " Rhode Island " that if " Monitor " needed help she would signal with a red lantern . " Monitor " was soon in trouble as the storm increased in ferocity . Large waves were splashing over and completely covering the deck and pilot house so the crew temporarily rigged the wheel atop the turret which was manned by Helmsman Francis Butts . Water continued flooding into the vents and ports and the ship began rolling uncontrollably in the high seas . Sometimes she would drop into a wave with such force the entire hull would tremble . Leaks were beginning to appear everywhere . Bankhead ordered the engineers to start the Worthington pump s , which temporarily stemmed the rising waters , but soon " Monitor " was hit by a squall and a series of violent waves and water continued to work its way into the vessel . Right when the Worthington pump could no longer keep pace with the flooding a call came from the engine room that water was gaining there . Realizing the ship was in serious trouble , Bankhead signaled " Rhode Island " for help and hoisted the red lantern next to " Monitor " s white running light atop the turret . He then ordered the anchor dropped to stop the ship ' s rolling and pitching with little effect making it no easier for the rescue boats to get close enough to receive her crew . He then ordered the towline cut and called for volunteers , Acting Master Stodder , along with crewmates John Stocking , and James Fenwick volunteered and climbed down from the turret , but eyewitnesses said that as soon as they were on the deck Fenwick and Stocking were quickly swept overboard and drowned . Stodder managed to hang on to the safety lines around the deck and finally cut through the towline with a hatchet . At 11 : 30 p . m . Bankhead ordered the engineers to stop engines and divert all available steam to the large Adams centrifugal steam pump ; but with reduced steam output from a boiler being fed wet coal it too was unable to stem the rapidly rising water . After all steam pumps had failed , Bankhead ordered some of the crew to man the hand pumps and organized a bucket brigade , but to no avail . Officers Greene and Stodder were among the last men to abandon ship and remained with Bankhead who was the last surviving man to abandon the sinking " Monitor " . In his official report of the " Monitor " s to the Navy Department Bankhead praised Green and Stodder for their heroic efforts and wrote , " I would beg leave to call the attention of the Admiral and of the Department of the particularly good conduct < br > of Lieutenant Greene and Acting Master Louis N . Stodder , who remained with me until the last , < br > and by their example did much toward inspiring confidence and obedience on the part of the others . " After a frantic rescue effort , " Monitor " finally foundered and sank approximately southeast off Cape Hatteras with the loss of sixteen men , including four officers , some of whom remained in the turret and went down with the ironclad , while forty - seven men were rescued by the life boats from " Rhode Island " . Bankhead , Green and Stodder barely managed to get clear of the sinking vessel and survived the ordeal but suffered from exposure from the icy winter sea . After his initial recovery , Bankhead filed his official report , as did the commanding officers of the " Rhode Island " , stating officers and men of both " Monitor " and " Rhode Island " did everything within their ability to keep " Monitor " from sinking . The Navy did not find it necessary to commission a board of inquiry to investigate the affair and took no action against Bankhead or any of his officers . Some time later a controversy emerged over why the " Monitor " sank . In the " Army and Navy Journal " Ericsson accused the crew of drunkardness during the storm and consequently unable to prevent the vessel from sinking . Stodder vigorously defended the crew and rebuked Ericsson ' s characterization of the crew and events and wrote to Pierce that Ericsson " cover ' s up defects by blaming those that are now dead " , pointing out that there were a number of unavoidable events and circumstances that led to the ship ' s sinking , foremost being the overhang between the upper and lower hulls which came loose and partially separated during the storm from slamming into the violent waves . Stodder ' s account was corroborated by other shipmates . Rediscovery . After months of investigation , research and one false positive , the " Monitor " was rediscovered off Cape Hatteras at a depth of , 111 years after her sinking . The Navy tested an " underwater locator " in August 1949 by searching an area south of the Cape Hatteras Light house for the wreck of the " Monitor " . It found a long object bulky enough to be a shipwreck , in feet of water that was thought to be the " Monitor " , but powerful currents negated attempts by divers to investigate . Retired Rear Admiral Edward Ellsberg proposed using external pontoons to raise the wreck in 1951 , the same method of marine salvage he had used on the sunken submarine " S - 51 " , for the cost of $ 250 , 000 . Four years later , Robert F . Marx claimed to have discovered the wreck based on the idea she had drifted into shallow water north of the lighthouse before sinking . Marx claimed to have dived on the wreck and to have placed a Coke bottle with his name on it in one of the gun barrels , although he never provided any proof of his story . Interest in locating the ship revived in the early 1970s and Duke University , the National Geographic Society and the National Science Foundation sponsored an expedition in August 1973 to search for the wreck using a towed sonar system . On 27 August , they discovered the wreck at coordinates . They sent a camera down to photograph the wreck , but the pictures were so fuzzy as to be useless ; on a second attempt the camera snagged something on the wreck and was lost . The sonar images did not match what they expected the wreck to look like until they realized that it was upside down . The team announced their discovery on 8 March 1974 . Another expedition was mounted that same month to confirm the discovery and the research submersible Alcoa Sea Probe was able to take still photos and video of the wreck that confirmed it was the " Monitor " . These photos revealed that the wreck was disintegrating and the discovery raised another issue . Since the Navy had formally abandoned the wreck in 1953 , it could be exploited by divers and private salvage companies as it lay outside of North Carolina ' s territorial limits . To preserve the ship , the wreck , and everything around it , a radius was designated as the Monitor National Marine Sanctuary , the first U . S . marine sanctuary on 30 January 1975 . The " Monitor " was also designated a National Historic Landmark on 23 June 1986 . Recovery . Initial efforts in 1995 by Navy and NOAA divers to raise the warship ' s propeller were foiled by an abnormally stormy season off Cape Hatteras . Realizing that raising the whole wreck was impractical for financial reasons as well as the inability to bring up the wreck intact , NOAA developed a comprehensive plan to recover the most significant part of the ship , namely her engine , propeller , guns , and turret . It estimated that the plan would cost over 20 million dollars to implement over four years . The Department of Defense Legacy Resource Management Program contributed $ 14 . 5 million . The Navy divers , mainly from its two Mobile Diving and Salvage Unit s , would perform the bulk of the work necessary in order to train in deep sea conditions and evaluate new equipment . Another effort to raise the " Monitor " s propeller was successful on 8 June 1998 , although the amount of effort required to work in the difficult conditions off Cape Hatteras was underestimated and the fewer than 30 divers used were nearly overwhelmed . The 1999 dive season was mostly research oriented as divers investigated the wreck in detail , planning how to recover the engine and determining if they could stabilize the hull so that it would not collapse onto the turret . In 2000 the divers shored up the port side of the hull with bags of grout , installed the Engine Recovery System , an external framework to which the engine would be attached , in preparation for the next season , and made over five times as many dives as they had the previous season . The 2001 dive season concentrated on raising the ship ' s steam engine and condenser . Hull plates had to be removed to access the engine compartment and both the engine and the condenser had to be separated from the ship , the surrounding wreckage and each other . A Mini Rover ROV was used to provide visibility of the wreck and divers to the support staff above water . The engine was raised on 16 July and the condenser three days later by the crane barge " Wotan " . Saturation diving was evaluated by the Navy that dive season on the " Monitor " and proved to be very successful , allowing divers to maximize their time on the bottom . The surface - supplied divers evaluated the use of heliox due to the depth of the wreck . It also proved to be successful once the dive table s were adjusted . Much like the previous year , the 2002 dive season was dedicated to lifting the turret to the surface . Around 160 divers were assigned to remove the parts of the hull , including the armor belt , that lay on top of the turret using chisels , exothermic cutting torch es and hydroblasters . They removed as much of the debris from inside the turret as possible to reduce the weight to be lifted . This was usually concreted coal as one of the ship ' s coal bunkers had ruptured and dumped most of its contents into the turret . The divers prepared the turret roof for the first stage of the lift by excavating underneath the turret and placed steel beams and angle irons to reinforce it for its move onto a lifting platform for the second stage . A large , eight - legged lifting frame , nicknamed the " spider " , was carefully positioned over the turret to move it onto the platform and the entire affair would be lifted by the crane mounted on the " Wotan " . The divers discovered one skeleton in the turret on 26 July before the lift and spent a week carefully chipping about half of it free of the concreted debris ; the other half was inaccessible underneath the rear of one of the guns . With Tropical Storm Cristobal bearing down on the recovery team , and time and money running out , the team made the decision to raise the turret on 5 August 2002 , after 41 days of work , and the gun turret broke the surface at 5 : 30 pm to the cheers of everyone aboard " Wotan " and other recovery ships nearby . As archaeologists examined the contents of the turret after it has been landed aboard " Wotan " , they discovered a second skeleton , but removing it did not begin until the turret arrived at the Mariners ' Museum for conservation . The remains of these sailors were transferred to the Joint POW - MIA Accounting Command ( JPAC ) at Hickam Air Force Base , Hawaii , in the hopes that they could be identified . Only 16 of the crew were not rescued by the " Rhode Island " before the " Monitor " sank and the forensic anthropologist s at JPAC were able to rule out the three missing black crewmen based on the shape of the femurs and skulls . Among the most promising of the 16 candidates were crew members Jacob Nicklis , Robert Williams and William Bryan , but a decade passed without their identities being discovered . On 8 March 2013 their remains were buried at Arlington National Cemetery with full military honors . Conservation of the propeller was completed nearly three years after its recovery and it is on display in the Monitor Center at the Mariners ' Museum . As of 2013 , conservation of the engine , its components , the turret and the guns continues . The Dahlgren guns were removed from the turret in September 2004 and placed in their own conservation tanks . Among some of the artifacts recovered from the sunken vessel was a red signal lantern , possibly the one used to send a distress signal to the " Rhode Island " and the last thing to be seen before the " Monitor " sank in 1862 – it was the first object recovered from the site in 1977 . A gold wedding band was also recovered from the hand of the skeletal remains of one of " Monitor " s crew members found in the turret . Northrop Grumman Shipyard in Newport News constructed a full - scale non - seaworthy static replica of the " Monitor " . The replica was laid down in February 2005 and completed just two months later on the grounds of the Mariners ' Museum . The Monitor National Marine Sanctuary conducts occasional dives on the wreck to monitor and record any changes in its condition and its environment . Memorials . The in McGolrick Park , Brooklyn depicts a sailor from the " Monitor " pulling on a capstan . The sculptor Antonio de Filippo was commissioned by the State of New York in the 1930s for a bronze statue to commemorate the Battle of Hampton Roads , John Ericsson , and the crew of the ship . It was dedicated on 6 November 1938 . A vandal doused it with white paint on 7 January 2013 . In 1995 the U . S . Postal Service issued a stamp commemorating the USS " Monitor " and CSS " Virginia " depicting the two ships while engaged in their famous battle at Hampton Roads . The 150th anniversary of the ship ' s loss prompted several events in commemoration . A memorial to the " Monitor " and her lost crew members was erected in the Civil War section of Hampton National Cemetery by NOAA ' s Office of National Marine Sanctuaries , together with the U . S . Navy and the U . S . Department of Veterans Affairs , and dedicated on 29 December 2012 . The Greenpoint Monitor Museum commemorated the ship and her crew with an event on 12 January 2013 at the grave sites of those " Monitor " crew members buried in Green - Wood Cemetery in Brooklyn , followed by a service in the cemetery ' s chapel . Legacy . The " Monitor " gave her name to a new type of mastless , low - freeboard warship that mounted its armament in turrets . Many more were built , including river monitor s , and they played key roles in Civil War battles on the Mississippi and James Rivers . The breastwork monitor was developed during the 1860s by Sir Edward Reed , Chief Constructor of the Royal Navy , as an improvement of the basic monitor design . Reed gave these ships a superstructure to increase seaworthiness and raise the freeboard of the gun turret s so they could be worked in all weathers . The superstructure was armoured to protect the bases of the turrets , the funnels and the ventilator ducts in what he termed a breastwork . The ships were conceived as harbor defence ships with little need to leave port . Reed took advantage of the lack of masts and designed the ships with one twin - gun turret at each end of the superstructure , each able to turn and fire in a 270° arc . These ships were described by Admiral George Alexander Ballard as being like " full - armoured knights riding on donkeys , easy to avoid but bad to close with " . Reed later developed the design into the , the first ocean - going turret ship s without masts , the direct ancestors of the pre - dreadnought battleship s and the dreadnought s .