There is only one route out of Southampton for ships of this size and that is to the east side of the Isle of Wight. There is a bit of a zig-zag approaching Cowes to clear the Bramble bank.
The ships usually turn left (close to the Isle of Wight) as you come out of Southampton Water and then sail along the Solent with Warsash/Lee on the Solent, Stokes Bay and then Southsea on your left with the Isle of Wight on your right...turning right after you pass Ryde.....
You will sail down the Solent passing Cowes on your Starboard side. Cruise ships are usually passing Cowes between 6.00pm and 6.30pm. Continuing along the northern side of the Isle of Weight, passing Osborne House, Queen Victoria's favourite home, Ryde with its long pier still on your starboard side. Once past Ryde look to Port side to see Portsmouth Harbour entrance and the Millenium Tower. You may miss some of these sights if you are on early sitting dinner.
Mea Culpa for my spelling of 'Wight'. Richard.
There is freestyle cruising on the Jade, so there are no definite times for meals; you will be able to see all of the north-eastern side of the Isle of Wight, including Norris Castle and Osborne House.