on 9 december 1941, reported sighting force z (the royal navy battleship , battlecruiser and supporting destroyers). the report was received by "kinu", and the 81st naval communications unit in saigon. the reception was poor and it took another 90 minutes to decode and relay the message to vice admiral jisaburo ozawa aboard his flagship, . however, "i-65"s report was incorrect about the heading of force z, throwing the japanese fleet into confusion. a kawanishi e7k "alf" from "kinu" buzzed "i-65", its pilot mistaking her for an enemy submarine. the following day, force z was overwhelmed by torpedo bombers of the 22nd air flotilla from french indochina.