Page:Report of the Board of Inquiry into the Helderberg air disaster.djvu/34

 Upper wind FL 140: 160/5–8 kt Visibilty: 10 km or more Cloud: Scattered cumulus and stratocumulus at 5 000 ft

No medium level cloud at FL 140.

The night was dark. The moon had set at 20:16 on November 27th 1987.

1.8 Aids to Navigation

The aeroplane was equipped with the following navigational aids and associated displays:

3 inertial navigation systems (INS) 2 weather and mapping radars with 300 nm range. 2 radio magnetic indicators (RMI) 1 standby compass 2 automatic direction finders (ADF) 3 very high frequency omni range (VOR) units 3 distance measuring units (DME) 3 instrument landing systems (ILS)

Plaisance Airport was equipped with the following terminal navigational aids:

2 VOR stations 2 DME stations 2 NDB stations

Runway 14 was equipped with an ILS system. The ground stations were serviceable.