0342 Minesweeper CONDOR sights periscope off Honolulu Harbor.. notifies patrol destroyer WARD to investigate. WARD does not detect sub. 0630 Destroyer WARD again notified of submarine sighting this time by supply ship ANTARES off Pearl Harbor entrance...Navy patrol plane (PBY) dispatched 0645 WARD opens fire on target hitting conning tower...as she closes in drops depth charges..air attack by PBY follows. 0653 WARD'S commander Captain Outerbridge sends message to Commandant 14th Naval District: "We have attacked, fired upon and dropped depth charges upon submarine operating in defensive sea area". 0715 Capt. Outerbridge's attack message, delayed in decoding is delivered to duty officer, 14th Naval District, and to Admiral Kimmel's duty officer Events according to Pearl Harbor Timeline (www.2marine.com/DLST) So is the first time a message about the sub sighting is sent to base at 0653? If so, who dispatched the PBY, that also attacked the sub with depth charges? How much difference, did the 22 min delay, in message decoding make? I would think it would have made some. I thought I read some place that at first, the sub sighting was not believed, but I could be wrong on that.