Paragraph 38 Signals in the signals area
When any signal specified in the following paragraphs of this Rule is displayed it shall be placed in a signals area, which shall be a square visible in all directions bordered by a white stripe 30 centimetres wide the internal sides measuring 12 metres.
A white landing T, as illustrated in this paragraph,
signifies that aeroplanes and gliders taking off or landing shall do so in a direction parallel with the shaft of the T and towards the cross arm, unless otherwise authorised by the appropriate air traffic control unit.
A white disc 60 centimetres in diameter displayed alongside the cross arm of the T and in line with the shaft of the T, as illustrated in this paragraph,
signifies that the direction of landing and take-off do not necessarily coincide.
A white dumb-bell, as illustrated in this paragraph,
signifies that movements of aeroplanes and gliders on the ground shall be confined to paved, metalled or similar hard surfaces.
A white dumb-bell as described in (4) above but with a black stripe 60 centimetres wide across each disc at right angles to the shaft of the dumb-bell, as illustrated in this paragraph,
signifies that aeroplanes and gliders taking off or landing shall do so on a runway but that movement on the ground is not confined to paved, metalled or similar hard surfaces.
A red and yellow striped arrow, as illustrated in this paragraph,
the shaft of which is at least one metre wide placed along the whole or not less than a total of 11 metres of two adjacent sides of the signals area and pointing in a clockwise direction signifies that a right-hand circuit is in force.
A red panel 3 metres square with a yellow stripe along one diagonal at least 50 centimetres wide, as illustrated in this paragraph,
signifies that the state of the manoeuvring area is poor and pilots must exercise special care when landing.
A red panel 3 metres square with a yellow stripe, at least 50 centimetres wide, along each diagonal, as illustrated in this paragraph,
signifies that the aerodrome is unsafe for the movement of aircraft and that landing on the aerodrome is prohibited.
A white letter H, as illustrated in this paragraph,
signifies that helicopters shall take off and land only within the area designated by the marking specified in Rule 40(5) of these Rules.
A red letter L displayed on the dumb-bell specified in paragraphs (4) and (5) of this Rule, as illustrated in this paragraph,
signifies that light aircraft are permitted to take off and land either on a runway or on the area designated by the marking specified in Rule 40(6) of these Rules.
A white double cross, as illustrated in this paragraph,
signifies that glider flying is in progress.