GM1 HPT-DSN.F.660 Visual approach slope indicator

(a)A visual approach slope indicator should be provided for a heliport where one or more of the following conditions exist:

(1)obstacle clearance, noise abatement or traffic control procedures require a particular slope to be flown;

(2)the environment of the heliport provides few visual surface cues; and

(3)the characteristics of the helicopter require a stabilised approach.

(b)When more than one visual approach slope indicator is installed at an aerodrome (e.g. PAPI, APAPI), a visual approach slope indicator should be designed and calibrated in order to give a clear and unambiguous indication to helicopter pilots approaching to land.

(c)A heliport visual approach slope indicator should be located adjacent to the nominal aiming point and aligned in azimuth with the preferred approach direction.

(d)Care is required in the design of the unit to minimise spurious signals between the signal sectors, and at the azimuth coverage limits.

(e)Larger azimuth coverage can be obtained by installing the HAPI system on a turntable.