The Battle of Arawe and the Battle of Cape Gloucester involved a number of "firsts" for the VII Amphibious Force. It marked the first use of an Australian LSI, , in combat, and the first appearance in SWPA of a Landing Ship, Dock (LSD), . The LSD was used to carry amtracs, also making their debut in SWPA, which were necessary to cross the coral reefs. Fire support was provided by two LCIs equipped with rockets. This proved so successful that Barbey had another six modified for the purpose. Casualties were evacuated using specially modified LCTs and LSTS equipped as hospital ships. For the first time, Beach Party 1 participated, providing a fully trained naval beach party for the first time. Contrary to doctrine, it was not affiliated with a particular APA. The Arawe operation also saw the first use of another innovation of Barbey's, the landing craft control officers. However, an attempt to land a force in rubber boats was a total failure, and was not repeated. Afterward, Barbey received his first properly equipped amphibious command ship, the . He also acquired an experienced deputy in Rear Admiral William M. Fechteler. Fechteler commanded the assault on the Admiralty Islands, in which APDs were employed in order to meet the Army's requirement for a reconnaissance in force.
