Went to the NBO terminus to get a ticket so as to travel on Saturday to voi, shock on me as I was told to go back tomorrow as the system allows bookings upto three days in advance, they need to extend the advance bookings to cover a months advance at the very least

From Wikipedia:
The twenty-foot equivalent unit (often
TEU or teu ) is an inexact unit of cargo capacity often used to describe the capacity of container ships and
container terminals .[1] It is based on the volume of a 20-foot-long (6.1 m)
intermodal container , a standard-sized metal box which can be easily transferred between different modes of transportation, such as ships, trains and trucks. [1]
The container is defined by its length though there is a lack of standardisation in regard to height, ranging between 4 feet 3 inches (1.30 m) and 9 feet 6 inches (2.90 m), with the most common height being 8 feet 6 inches (2.59 m). [2] Also, it is common to designate 45-foot (13.7 m) containers as 2 TEU, rather than 2.25 TEU.