Complex sentence: Both main designs, along with a few design variations, planned the main artillery layout of 6-5.9 inch guns in 3 double turrets; one positioned on the bow and the remaining 2 on the stern.
Split into simpler sentences: Both main designs, along with a few design variations all planned the main artillery layout of 6-5.9 inch guns in 3 double turrets. One turret positioned on the bow and the remaining 2 on the stern.