BB. This abbreviation can be and is used for a variety of different terms such as: "Ballast Bonus", "Below bridges", "Breaking bulk" and "Bulbous bow".
Booking office. Conference lines, operating in certain trades, may decide to establish a booking office to take bookings and also ensure that each line carries its agreed share. Shippers may not be permitted to insist on carriage by a specific line although the booking office may try to meet shippers’ wishes in this respect as much as possible.