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(g) A cargo ship is any ship which is not a passenger ship. (h) A tanker is a cargo ship constructed or adapted for the carriage in bulk of liquid cargoes of an inflammable nature. (i) "New ship " means a ship the keel of which is laid on or after the date of coming into force of the present Convention. (j) " Existing ship " means a ship which is not a new ship. (k) A mile is 6,080 feet or 1,852 metres. Regulation 3 Exceptions (a) The present regulations, unless expressly provided otherwise, do not apply to : (i) Ships of war and troopships. (ii) Cargo ships of less than 500 tons gross tonnage. (iii) Ships not propelled by mechanical means. (iv) Wooden ships of primitive build, such as dhows, junks, &c. (v) Pleasure yachts not engaged in trade. (vi) Fishing vessels. (b) Notwithstanding any provisions of the present regulations, nothing herein shall apply to ships solely navigating the Great Lakes of North America and their connecting and tributary waters as far east as the lower exit of the Lachine Canal at Montreal in the Province of Quebec, Canada. Regulation 4 Exemptions (a) A ship which is not normally engaged on international voyages but which, in exceptional circumstances, is required to undertake a single international voyage may be exempted by the Administration from any of the requirements of the present regulations provided that it complies with safety, requirements which are adequate in the opinion of the Administration for the voyage which is to be undertaken by the ship. (b) Each Administration shall submit to the Organization as soon as possible after the Ist of January each year a report showing the number of voyages of this nature for which exemptions have been granted in the previous calendar year. Regulation 5 Equivalents (a) Where in the present regulations it is provided that a particular fitting, appliance or apparatus, or type thereof, shall be fitted or carried in a ship, or that any particular arrangement shall be> adopted, an Administration may accept in substitution therefor any other fitting, appliance or apparatus, or type thereof, or any other arrangement, provided that the Administration shall have been satisfied by suitable trials that the fitting, appliance or apparatus, or type thereof, or the arrangement substituted is at least as effective as that specified in the present regulations. - (b) Any Administration which so accepts, in substitution, a fitting, appliance or apparatus, or type thereof, or other arrangement, shall inform the Organization, and, upon request, shall communicate to the Organization particulars thereof together with a report on the trials made.

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