As part of their modernization in the 1980s, each of the Iowas received a complement of eight quad-cell Armored Box Launchers and four “shock hardened” Mk 141 quad-cell launchers. The former was used by the battleships to carry and fire the BGM-109 Tomahawk Land Attack Missiles (TLAMs) for use against enemy targets on land, while the latter system enabled the ships to carry a complement of RGM-84 Harpoon anti-ship missiles for use against enemy ships. With an estimated range of 675 to 1,500 nautical miles (1,250 to 2,778 km; 777 to 1,726 mi)[103] for the Tomahawks and 64.5 to 85.5 nautical miles (119.5 to 158.3 km; 74.2 to 98.4 mi)[103] for the Harpoons, these two missile systems displaced the 16-inch guns and their maximum range of 42,345 yards (38.7 km; 20.9 nmi)[36] to become the longest-ranged weapons on the battleships during the 1980s; the ships’ complement of 32 Tomahawk missiles was the largest until the Mk 41 VLS-equipped Ticonderoga-class cruisers entered service.