In this Part of this Act the following expressions have the meanings hereby respectively assigned to them, that is to say—
" canal " includes any river, inland navigation or lake, and any other waters situate wholly or in part within a county or county borough, whether those waters are or are not within the ebb and flow of the tide;
" canal boat " means any vessel, however propelled, which is used for the conveyance of goods along a canal, not being— a sailing barge which belongs to the class generally known as " Thames sailing barge " and is registered under the Merchant Shipping Acts, 1894 to 1928, either in the port of London or elsewhere; or a sea-going ship so registered; or a vessel used for pleasure purposes only;
" master, " in relation to a canal boat, means the person having command or charge of the boat; and
" owner, " in relation to a canal boat, includes a person who, though only the hirer of the boat, appoints the master and other persons working the boat.