All commercial harbors and roadsteads, and all commercial harbor and waterfront improvements belonging to or controlled by the State, and all vessels and shipping within the commercial harbors and roadsteads shall be under the care and control of the department of transportation.

For the purpose of this chapter, “commercial harbor” means a harbor or off-shore mooring facility which is primarily for the movement of commercial cargo, passenger and fishing vessels entering, leaving, or traveling within the State, and facilities and supporting services for loading, off-loading, and handling of cargo, passengers, and vessels.