The Monroe may have been carrying pursuit planes, their pilots and ground crews to reinforce the New Zealand garrison on Fiji. Refer last paragraph P87, http://metalab.unc.edu/hyperwar/USMC/I/USMC-I-II-3.html. The Achilles was a New Zealand light cruiser. She was fairly busy, and by this stage of the war had taken part in the Battle of The River Plate. Would you like me to have a dig around and see what I can find?