$1:
The report slammed the navigator, who was listening to his iPod in his cabin while revising for an exam at the time.
Well that kinda indicates he wasn't on watch at the time, so I'm not sure why this is being brought up as an issue. The 'gator doesn't stay on the bridge 24/7.
$1:
Sonar operators and radio men were missing from their posts.
This is more of the problem. Unless they were operating at reduced manning levels for whatever reason it sounds like they weren't doing an adequate job of monitoring their contacts.
$1:
Others drove the attack sub while "with one hand on the controls and their shoes off", it said.
Well to be fair the guy at the con only needs to be able to read numbers on dials. They don't need shoes to do this. This is more of a readiness concern in that the sailor isn't 100% ready to respond to an emergency. The article was written to make it seem like things on the sub were worse off than it was. However it still doesn't excuse poor watchkeeping and the CO's duty to ensure a proper watch was being maintained.