Complex sentence: They resembled contemporary battleships in appearance, weighed only 5,000 tons less in displacement, mounted the familiar 2-A-1 main battery, It was also found on the, "South Dakota"-class battleship, and "Baltimore"-class heavy cruiser.
Split into simpler sentences: They resembled contemporary battleships in appearance, and weighed only 5,000 tons less in displacement. They also mounted the familiar 2-A-1 main battery, It was also found on the, "South Dakota"-class battleship, and "Baltimore"-class heavy cruiser.