794 
layer is supersaturated with respect to ice and probably 
subsaturated with respect to the cloud droplets. Only 
light rime icing will be experienced by aircraft entering 
this layer, if the clouds reported in them are alto- 
stratus, altocumulus cumulogenitus, or altocumulus 
virga; only light hoar frost will be sublimed on the air- 
craft, if the clouds in such a layer are reported as cir- 
rus, cirrocumulus, cirrostratus, or cirrus nothus. In 
cloudless regions of this layer, no supercooled droplets 
will be present, but hoarfrost will also form on the air- 
craft through direct sublimation of the water vapor. 
Finally, in the case where the temperature curve lies 
to the right of the —8D curve in a subfreezing layer, 
this layer is subsaturated with respect to both ice and 
plane water surface, so that no icing should be forecast 
here. 
10. 
ill, 
12. 
13. 
14. 
15. 
16. 
i7/, 
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