out ▁over ▁O ahu ▁and ▁the ▁other ▁over ▁L ah ain a ▁Ro ads , ▁Mau i , ▁respectively , ▁with ▁orders ▁to ▁report ▁on ▁U . S . ▁fleet ▁composition ▁and ▁location . ▁Re con na issance ▁aircraft ▁fl ights ▁risk ed ▁alert ing ▁the ▁U . S ., ▁and ▁were ▁not ▁necessary . ▁U . S . ▁fleet ▁composition ▁and ▁prepared ness ▁information ▁in ▁Pear l ▁Har bor ▁were ▁already ▁known ▁due ▁to ▁the ▁reports ▁of ▁the ▁Japanese ▁sp y ▁Take o ▁Y osh ik awa . ▁A ▁report ▁of ▁the ▁absence ▁of ▁the ▁U . S . ▁fleet ▁in ▁L ah ain a ▁anch orage ▁off ▁Mau i ▁was ▁received ▁from ▁the ▁T one ' s ▁float plane ▁and ▁fleet ▁sub marine ▁. ▁Another ▁four ▁sc out ▁plan es ▁pat rolled ▁the ▁area ▁between ▁the ▁Japanese ▁car rier ▁force ▁( the ▁Kid ō ▁But ai ) ▁and ▁N ii h au , ▁to ▁detect ▁any ▁counter att ack . ▁ ▁Sub mar ines ▁Fle et ▁sub mar ines ▁, ▁, ▁, ▁, ▁and ▁ ▁each ▁emb ark ed ▁a ▁Type ▁A ▁m idget ▁sub marine ▁for ▁transport ▁to ▁the ▁waters ▁off ▁O ahu . ▁The ▁five ▁I - bo ats ▁left ▁K ure ▁Naval ▁District ▁on ▁November ▁ 2 5 , ▁ 1 9 4 1 . ▁On ▁December ▁ 6 , ▁they ▁came ▁to ▁within ▁ ▁of ▁the ▁mouth ▁of ▁Pear l ▁Har bor ▁and ▁launched ▁their ▁m idget ▁subs ▁at ▁about ▁ 0 1 : 0 0 ▁local