The American Bureau of Shipping is a U.S. classification society that certifies if a ship is in compliance with standard rules of construction and maintenance.

Port charge relating to a vessel moored at approved anchorage site in a harbor.

The area immediately in front of or behind a wharf shed on which cargo is lifted. On the"front apron," cargo is unloaded from or loaded onto a ship. Behind the shed, cargo moves over the"rear apron" into and out of railroad cars.