Piecing together the unconfirmed timeline presented in "Key military help for victims of Hurricane Katrina was delayed" we get:
- Aug 29: landfall; "levee breaches" occur
Aug 29 3:22:00 PM - Navy says USS Bataan is standing by.
- Aug 30: Michael Chertoff goes to Atlanta for a "previously scheduled briefing on avian flu"
- Aug 30: "[Chertoff] aides also concede that Washington officials were unable to confirm that the levees in New Orleans had failed until midday on Aug. 30. The breaches were first discovered in Louisiana some 32 hours earlier."
- Aug 31: CNN mentions Bataan in passing.
- Aug 31: "President Bush went on national television to announce a massive federal rescue and relief effort"
- But orders to move didn't reach key active military units for another three days. (Sep. 2?)
Once they received them, it took just eight hours for 3,600 troops from the 82nd Airborne Division at Fort Bragg, N.C., to be on the ground in Louisiana and Mississippi with vital search-and-rescue helicopters. Another 2,500 soon followed from the 1st Cavalry Division at Fort Hood, Texas.
Then, from "Military May Play Bigger Relief Role":
[Sep. 3:] The active-duty elements that Bush did send to Louisiana and Mississippi included some Army and Marine Corps helicopters and their crews, plus Navy ships. The main federal ground forces, led by troops of the 82nd Airborne Division from Fort Bragg, N.C., arrived late Saturday, five days after Katrina struck.
And, from Sep. 4 comes "Navy ship nearby underused" about the Bataan.