(1)A ship is a British ship if—
(a)the ship is registered in the United Kingdom under Part II; or
(b)the ship is, as a Government ship, registered in the United Kingdom in pursuance of an Order in Council under section 308; or
(c)the ship is registered under the law of a relevant British possession; or
(d)the ship is a small ship other than a fishing vessel and—
(i)is not registered under Part II, but
(ii)is wholly owned by qualified owners, and
(iii)is not registered under the law of a country outside the United Kingdom.
(2)For the purposes of subsection (1)(d) above—
“qualified owners” means persons of such description qualified to own British ships as is prescribed by regulations made by the Secretary of State for the purposes of that paragraph; and
“small ship” means a ship less than 24 metres in length (“length” having the same meaning as in the tonnage regulations).
(3)A ship is a “United Kingdom ship” for the purposes of this Act (except section 85 and 144(3)) if the ship is registered in the United Kingdom under Part II (and in Part V “United Kingdom fishing vessel” has a corresponding meaning).