For close-range defense against torpedo boats, she carried six 3-inch 76 mm/50 caliber guns mounted in casemates along the side of the hull, eight 3-pounder guns, and six 1-pounder guns. The secondary battery consisted of sixteen 6-inch 152 mm/50 caliber Mark 6 guns, which were placed in casemates in the hull. The ship was armed with a main battery of four 12-inch/40 caliber guns in two twin gun turrets on the centerline, one forward and aft. She had a crew of 561 officers and enlisted men, which increased to 779–813. As built, she was fitted with heavy military masts, but these were quickly replaced by cage masts in 1909. The ship was powered by two-shaft triple-expansion steam engines rated at 16.000 indicated horsepower 12.000 kW and twenty-four coal-fired Niclausse boilers, generating a top speed of 18 knots 33 km/h 21 mph.
She displaced 12.846 long tons 13.052 t as designed and up to 13.700 long tons 13.900 at full load. Maine was 393 feet 11 inches 120.07 m long overall and had a beam of 72 ft 3 in 22.02 m and a draft of 24 ft 4 in 7.42 m. The ship was ultimately sold for scrap in January 1922 and broken up for scrap under the terms of the Washington Naval Treaty signed that year. She remained in active service until May 1920, when she was decommissioned. During Americas participation in World War I from April 1917 to November 1918, Maine was used as a training ship. After returning to the U.S., she served as the 3rd Squadron flagship. Later that year, she joined the cruise of the Great White Fleet, though her heavy coal consumption prevented her from continuing with the fleet past San Francisco. Maine served in the Atlantic for the entirety of her career with the North Atlantic Fleet, which later became the Atlantic Fleet during the early years of her service, she was the fleet flagship, until she was replaced in 1907. She was armed with a main battery of four 12-inch guns and could steam at a top speed of 18 knots. She was launched in July 1901 and commissioned into the fleet in December 1902. Maine was laid down in February 1899 at the William Cramp & Sons shipyard in Philadelphia. USS Maine, the lead ship of her class of pre-dreadnought battleships, was the second ship of the United States Navy to be named in honor of the 23rd state.