CS HPT-DSN.F.570 Touchdown/positioning marking

(a)Applicability:

(1)A touchdown/positioning marking should be provided where it is necessary for a helicopter to touch down and/or be accurately positioned.

(2)A touchdown/positioning marking should be provided on a helicopter stand designed for turning.

(b)Location:

(1)A touchdown/positioning marking should be located so that when the pilot’s seat is over the marking, the whole of the undercarriage should be within the TLOF and all parts of the helicopter should be clear of any obstacle by a safe margin.

(2)On a heliport, the centre of the touchdown/positioning marking should be located at the centre of the TLOF, except the centre of the touchdown/positioning marking may be offset away from the centre of the TLOF where a safety assessment indicates such offsetting to be necessary, and providing that a marking that is so offset would not adversely affect safety.

(3)For a helicopter stand designed for hover turning, the touchdown/positioning marking should be located in the centre of the central zone (see Figure D-1).

(c)Characteristics:

(1)A touchdown/positioning marking should be a yellow circle and have a line width of at least 0.5 m.

(2)The inner diameter of the touchdown/positioning marking should be 0.5 D of the largest helicopter the TLOF and/or the helicopter stand is intended to serve.