Intermodal transportation
Intermodal transportation means continuous through transportation involving more than one mode of service (e.g., ship, rail, motor, air), for pickup and/or delivery at a point beyond the area of the port at which the vessel calls. The term intermodal transportation can apply to through transportation (at through rates) or transportation on through routes using combination rates.
Source
46 CFR § 520.2
Scoping language
The following definitions shall apply to this part: