Second Reclassification
For the remainder of 1943 and on into 1944, Vireo followed the Fleet as it inched closer to Japan. In the rearward island areas, she continued her duties as a harbor tug and local escort vessel. On 15 May 1944, Vireo was reclassified as an ocean-going tug, old, and redesignated ATO-144.
In late July, American forces struck in northwestern New Guinea at Cape Sansapor. Vireo took part in these operations from 30 July to 2 August, engaged in the vital support activities necessary to support the successful landings.
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