United States Navy 1975 Ship Reclassification - Classification Prior To 1975

Classification Prior To 1975

From the 1950s to 1975, the Navy had three types of fast task force escorts and one type of convoy escort. The task force escorts were cruisers (CAG/CLG/CG), frigates or destroyer-leaders (DL/DLG), and destroyers (DD/DDG); the convoy escorts were ocean escorts (DE/DEG), often known as destroyer escorts. Added in the early 1970s was a new ocean escort called the patrol frigate (PF). In 1975, these classifications were simplified to cruiser (CG), destroyer (DD/DDG), and frigate (FF/FFG).

Under the pre-1975 classification, cruisers were large vessels, the size of World War II gun cruisers, intended as the primary surface combatants. All but one ( USS Long Beach (CGN-9)) were converted WWII gun cruisers (CL/CLG or CA/CAG), carrying either Talos or Terrier, and in some cases also Tartar missiles. One cruiser was to be assigned to each carrier group. There were relatively few of these ships, due to their cost and because the frigates could carry almost as many weapons as a cruiser.

From 1950 to 1975, frigates were a new type, midway between cruiser and destroyer sizes, intended as major task force escorts. The first ship of the type was a redesignated ASW cruiser; the next four were very large AAW (gun) destroyers, and the remainder were essentially oversize guided missile destroyers. They carried the mid-range Terrier missile, but no offensive (strategic) weapons.

Destroyers were developed from the WWII designs as the smallest fast task force escorts. DDs were fast ASW ships; DDGs were AAW ships carrying the short-range Tartar missile.

Ocean escorts were an evolution of the WWII destroyer escort types. They were intended as convoy escorts and were designed for mobilization production in wartime or low-cost mass production in peacetime. DEs were ASW vessels; DEGs were AAW vessels with the Tartar.

The U.S. frigate classification was not used by any other navy; similar vessels were either cruisers or destroyers in foreign service. The ocean escort type corresponded to foreign frigates (convoy escorts).