13. pants

High speed

craft**

(a) The masthead light of

high-speed craft may be placed at a height related to the breadth

of the craft lower than that prescribed in paragraph 2(a)(i) of

this annex, provided that the base angle of the isosceles

triangles formed by the sidelights and masthead light, when seen

in end elevation, is not less than 27°.

(b) On high-speed craft of 50 metres or more in length, the

vertical separation between foremast and mainmast light of 4.5

metres required by paragraph 2(a)(ii) of this annex may be

modified provided that such distance shall not be less than the

value determined by the following formula: