AegisFC: Does the US Navy really still need Frigates? Do the FF's still play a vital role in the Navy?
The LCS and FFGs/FFs are used to escort the supply ships during wartime, as almost all of the cruisers and destroyers are used to escort carrier battle groups and marine expeditionary force groups. The navy also requires escorts for several merchant convoys as well. Simply put, mid ocean ASW escorts, not front line warships...
Since that role isn't threatened by over 100 Soviet submarines any longer, the US Navy is attempting to add a littoral capability with the LCS. During peacetime the US Navy lately has used its FFGs as picket ships. Their shortcomings as pickets is in the littoral regions near land...
In summary, the US requires mid ocean ASW escorts capable of defending themselves against a low air threat, whether by aircraft or missiles. The LCS is designed to fulfill this role along with the new littoral capabilities the Navy does not wish to risk a cruiser or a destroyer...
The LCS will also replace the minehunter fleet as well with new technology mine countermeasures equipment. Doing so will save the expense of replacing the current minehunters. The goal is to get two ship types for the price of one. While our current minehunter force are great in local areas, i.e., short distances, they are very slow to deploy half way around the world. Recently the US Navy has shipped the minehunters abroad. It would be nice if the minehunters could sail there under their own power...
Its likely an LCS will be operating during peacetime with a carrier battle group or marine expeditionary force. In wartime the LCS will probably operate with other LCS in a convoy escorting group whether supply or merchant. Its not expected the LCS will operate alone...
Even at $500 million, the LCS is still a fourth of the price of one $2 billion Burke class destroyer... Or if you wish to be pessimistic, at $700 million they are a third of the cost of a destroyer...
Yes, a frigate design along the lines of the Coast Guard's Bertholf class would run $100 million cheaper, but we would still be faced with building minehunters at a similar cost. At the moment with the US shipbuilding program, its the FFGs which are reaching their paying off stage, not cruisers or destroyers. After the LCS class is built, the US can return to building more destroyers and cruisers...
Unlike most nations, the US has defense commitments to Diego Garcia smack in the middle of the Indian Ocean, along with commitments to Guam, which is closer to China than the continental US... Even our states of Alaska and Hawaii are a significant distance from the continental US...