I am assuming that it will be a 747-400OB aircraft (upgraded seats, PTV's, increased legroom, increased United Business seating). The 747-400OB seats: 18F, 84B, 270Y. You should have an exceptionally good flight, especially if you're on the OB aircraft. If you want to be 100% sure about this, call United Reservations (1-800-241-6522) and then talk to the International people (#4 on the option list). Give them your name, the day you're flying, etc. and then ask what type of plane it is. If they give you the "it's a 747, sir" line, ask what the seating capacity is, and then if it is not the same as the 18F, 84B, 270Y as I listed here, post another message, and I will find out the other seating config for you!