Vessels operating on fixed itineraries or regular schedules and established rates available to all shippers. The freight rates which are charged are based on the shipping company's tariff or if the company is a member of a liner conference, the tariff of that conference.

Vessels operating between ports on a regular schedule.

Sailings between specified ports on a regularly scheduled basis.

a little bit more regimented, is wider in administrative slope because of its nature, agency linkages and so on and so forth