In this Schedule—

• “accident” means a collision of ships, a stranding, another incident of navigation or another event (whether on board a ship or not) which results in material damage to a ship or its cargo or in an imminent threat of material damage to a ship or its cargo,

• “action” includes omission,

• “enactment” includes an enactment comprised in, or in an instrument made under, an Act of the Scottish Parliament,

• “harbour authority” has the meaning given by section 151(1),

• “harbour master” includes a dock master or pier master, and any person specially appointed by a harbour authority for the purpose of enforcing the provisions of this Schedule in relation to the harbour,

• “hazardous substance” has the meaning given by sub-paragraph (2),

• “owner”, in relation to the ship to or in which an accident has occurred, includes its owner at the time of the accident,

• “pilot” means a person who does not belong to a ship but who has the conduct of it,

• “pollution” means significant pollution in the United Kingdom, United Kingdom waters or an area of the sea specified under section 129(2)(b), and

• “risk to safety” means a risk to the safety of persons, property or anything navigating in or using United Kingdom waters.