The first of these was mounted on the top of the island shortly before she was completed in July 1942 and the other was added later in the year. This latter system was fitted on the port side of the hull, outboard of the aft lift.
This passage describes two systems being added to a ship. The first was installed on top of the island before completion in July 1942, while the second was added later that year and positioned on the port side of the hull, outboard of the aft lift.