Disabled tanker means a tanker experiencing a loss of propulsion or steering control.

Double hull tanker means any self-propelled tank vessel that is constructed with both double bottom and double sides in accordance with the provisions of 33 CFR 157.10d.

Escort transit means that portion of the tanker's voyage through waters where escort vessels are required.

Escort vessel means any vessel that is assigned and dedicated to a tanker during the escort transit, and that is fendered and outfitted with towing gear as appropriate for its role in an emergency response to a disabled tanker.

Laden means transporting in bulk any quantity of applicable cargo, except for clingage and residue in otherwise empty cargo tanks.

Single hull tanker means any self-propelled tank vessel that is not constructed with both double bottom and double sides in accordance with the provisions of 33 CFR 157.10d.

Tanker master means the licensed onboard person in charge of the tanker.

Tanker owner or operator means the owner or shoreside organization (individual, corporation, partnership, or association), including a demise charterer, responsible for the overall management and operation of the tanker.