In this Act, unless the contrary intention appears:
"explosives" means:
(a) substances or articles capable of producing an explosive, incendiary or pyrotechnic effect;
(b) substances or articles prescribed by the regulations to be explosives; or
(c) containers that have contained a substance or article to which paragraph ( a) or (b) applies and have not been certified, in accordance with the regulations, to be free from explosives.
"handling" includes loading, unloading, discharging, stacking, stowing, storing, transporting and any operation incidental to, or arising out of, any of those operations.
"vessel" means a ship, boat or other vessel used for any purpose on the sea or in navigation.