ks , ▁and ▁some ▁S BD ▁Da unt less ▁d ive ▁bom bers ▁from ▁the ▁car rier ▁. ▁ ▁In ▁the ▁first ▁wave ▁attack , ▁about ▁eight ▁of ▁the ▁forty - n ine ▁ 8 0 0   kg ▁( 1 7 6 0   lb ) ▁arm or - p ier cing ▁bomb s ▁dropped ▁hit ▁their ▁intended ▁batt les hip ▁targets . ▁At ▁least ▁two ▁of ▁those ▁bomb s ▁broke ▁up ▁on ▁impact , ▁another ▁det on ated ▁before ▁pen etr ating ▁an ▁un arm ored ▁deck , ▁and ▁one ▁was ▁a ▁d ud . ▁Th ir teen ▁of ▁the ▁forty ▁tor ped o es ▁hit ▁batt les hips , ▁and ▁four ▁tor ped o es ▁hit ▁other ▁ships . ▁Men ▁ab o ard ▁U . S . ▁ships ▁a wo ke ▁to ▁the ▁sounds ▁of ▁al ar ms , ▁bomb s ▁expl oding , ▁and ▁gun fire , ▁prompt ing ▁ble ary - ey ed ▁men ▁to ▁dress ▁as ▁they ▁ran ▁to ▁General ▁Qu arters ▁stations . ▁( The ▁famous ▁message , ▁" A ir ▁ra id ▁Pear l ▁Har bor . ▁This ▁is ▁not ▁dr ill .", ▁was ▁sent ▁from ▁the ▁headquarters ▁of ▁Pat rol ▁Wing ▁Two , ▁the ▁first ▁senior ▁Hawai ian ▁command ▁to ▁respond .) ▁The ▁def enders ▁were ▁very ▁un prep ared . ▁Am mun ition ▁lock ers ▁were ▁locked , ▁aircraft ▁park ed ▁wing tip ▁to ▁wing tip ▁in ▁the ▁open ▁to ▁prevent ▁sab ot age , ▁guns ▁un mann ed ▁( none ▁of ▁the