Ok as sad as this is the Oklahoma has a funny secondary build. Starts at 5.5km. Add Secondary module. Captain obviously with Basic and Advanced fire training. Add secondary signal flag and for god's sake the speed flag to boost it a little over 20 knots. Gives you 8.3 km secondary guns. Now at tier 5 that's about as far as dds can shoot. For those that play Mikasa or PEF yeah its that brutal.