sentences:  As each battleship arrived for modernization during the early and mid-1980s the Bofors mounts that remained aboard were removed due in large part to the ineffectiveness of such manually aimed weapons against modern day jet fighters and enemy missiles.The replacement for the Bofors guns was the US Navy's Phalanx Close-in weapon system (CIWS).During their modernization in the 1980s, each "Iowa"-class battleship was equipped with four of the US Navy's Phalanx CIWS mounts, two of which sat just behind the bridge and two which were forward and outboard of the after ship's funnel.