Markers with orange and white stripes of an equal width of 50 centimetres, with an orange stripe at each end, as illustrated in this paragraph,

alternating with flags 60 centimetres square showing equal orange and white triangular areas, indicate the boundary of an area unfit for the movement of aircraft and one or more white crosses as specified in rule 43(1) indicate the said area. The distance between any two successive orange and white flags shall not exceed 90 metres.

Striped markers, as specified in paragraph (1), spaced not more than 45 metres apart, indicate the boundary of an aerodrome.

On structures, markers with orange and white vertical stripes, of an equal width of 50 centimetres, with an orange stripe at each end, as illustrated in this paragraph,

spaced not more than 45 metres apart, indicate the boundary of an aerodrome. The pattern of the marker shall be visible from inside and outside the aerodrome and the marker shall be affixed not more than 15 centimetres from the top of the structure.

White flat rectangular markers 3 metres long and 1 metre wide at intervals not exceeding 90 metres, flush with the surface of the unpaved runway or stopway, as the case may be, indicate the boundary of an unpaved runway or of a stopway.

A white letter H, as illustrated in this paragraph,

indicates an area which shall be used only for the taking off and landing of helicopters.

A white letter L, as illustrated in this paragraph,

indicates a part of the manoeuvring area which shall be used only for the taking off and landing of light aircraft.

A yellow cross with two arms each 6 metres long by 1 metre wide at right angles, indicates that tow ropes, banners and similar articles towed by aircraft shall only be picked up and dropped in the area in which the cross is placed.

A white double cross, as illustrated in this paragraph,

indicates an area which shall be used only for the taking off and landing of gliders.

A white landing T as specified in rule 42(2) placed at the left-hand side of the runway when viewed from the direction of landing indicates the runway to be used, and at an aerodrome with no runway it indicates the direction for take off and landing.