It is a legacy of a USMC requirement for the navy to be able to provide fire support. This was a role that battleships and cruisers used to fulfill. The reason why the Battleships took so long to retire, was that no other vessels could provide the same standoff distance and the same weight of fire.ajay_ijn said:What is the idea behind having Gun(Advanced Gun System) which can fire at the range of 100miles?
The LR gun gets over some of those problems.