P.A.S.I. Passive Approach Slope Indicator

• The PASI - 303 (Retro-reflective - Passive Approach Slope Indicator) provides visual glide slope information to the approaching helicopter or fixed wing aircraft, allowing accurate and safe approach guidance to the landing zone.

  It consists of three array panels, know as RL - array No.1 and RL - array No.2. The RL - array No.2 is comprised of two array panels, separated by 10 metres, located to the side of the landing zone at right a right angle to the approach path. The RL - array No.1 is comprised of one array panel positioned in the centre of array No.2 and in front by 25 metres. When the RL - arrays 1 and 2 are installed correctly, the PASI - 303 Retro-Reflective panels will be in horizontal alignment if the aircraft is on the correct approach path. If the aircraft is too low on it's approach path, the pilot will see the centre Retro-Reflective panel, in the array, move above the two outside panels. If the aircraft is too high on it's approach path, the pilot will see the centre Retro-Reflective panel, in the array, move below the two outside panels. The RL - array No.2 serves as a horizontal reference to RL - array No.1.

  The PASI - 303 has extremely high reflective capabilities, allowing controlled approaches at great distances, without the aid of electricity or ground support.