Most Task Force 58 groups paired two fleet carriers with two light carriers, backed by heavy or light cruisers and destroyers for air defense and screening; Task Group 58.4 operated one fleet carrier short. USS Canberra, a Baltimore-class heavy cruiser originally named Pittsburgh, carried the Australian cruiser's name in memory of HMAS Canberra. Indianapolis carried Spruance but had explicit orders to keep him away from a surface fight, while Lexington would also withdraw with the carriers. The arrangement treated command preservation, strike coordination, and escort density as parts of one force design.
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How Task Force 58 standardized carrier groups
The American order of battle is presented as a standardized carrier-group system with layered escorts and protected command ships.