[trooper6]

I just stick to what the book says:
"Although the exact duration of a jump cannot be predicted, a ship can usually detect the onset of emergence a few minutes in advance. Most starships set a 168-hour “jump clock” when the jump engines are turned on, and an alarm sounds when the ship is about to emerge from jumpspace. Some starship crewmen entertain themselves by placing bets on the exact length of each jump . . ." pg. 174

So, the crew knows on average a Jump takes 168 hours. They set the clock and know you'll emerge from Jump sometime around then. And a few minutes before the ship actually leaves Jump space, and alarm sounds and everyone rushes to position.