13.5.1 Craft should be provided with at least one azimuth-stabilised radar operating in the X-
band (3 cm).
13.5.2 Craft of 500 tons gross tonnage and upwards or craft certificated to carry more than
450 passengers should be provided with at least two radar installations. A second radar may
also be provided in craft of less than 500 tons gross tonnage or certified to carry 450
passengers or less where environmental conditions so require.
13.5.3 At least one radar should be equipped with facilities for plotting which are at least as
effective as a reflector plotter.
13.5.4 Adequate communication facilities should be provided between the radar observer and
the person in immediate charge of the craft.
13.5.5 Each radar installation provided should be suitable for the intended craft speed, motion
characteristics and commonly encountered environmental conditions.
13.5.6 Each radar installation should be mounted so as to be as free as practicable from
vibration.
