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 strip 30 centimetres wide the internal sides measuring 12 metres.
A white landing T, as illustrated in this paragraph,
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Fig. 1
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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,
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Fig. 2
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signifies that the direction of landing and take-off do not necessarily coincide.
A white dumb-bell, as illustrated in this paragraph,
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Fig. 3
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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 strip 60 centimetres wide across each disc at right angles to the shaft of the dumb-bell, as illustrated in this paragraph,
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Fig. 4
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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,
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Fig. 5
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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 strip along one diagonal at least 50 centimetres wide, as illustrated in this paragraph,
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Fig. 6
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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 strip, at least 50 centimetres wide, along each diagonal, as illustrated in this paragraph,
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Fig. 7
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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,
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Fig. 8
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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 paragraph (4) and (5) of this Rule, as illustrated in this paragraph,
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Fig. 9
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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,
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Fig. 10
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signifies that glider flying is in progress.