Large number of Japanese warships and transports in harbour of Rabaul according to the U.S. Joint Intelligence Committee. Daily summary dated 25 January 1942

An item reported that aircraft sighted 3 Japanese cruisers, 1 aircraft carrier, 1 destroyer and 11 transports in the harbour of Rabaul [Papua New Guinea].

Source

Map Room Papers (Roosevelt Administration), 1942 - 194