Code 



TABLE 28 

 Visibility 

 WMO Code 4300 for recording visibility at siirface 



Less than 50 metres (less than 55 yards) 



1 50-200 metres (approx. 55-220 yards) 



2 200-500 metres (approx. 220-550 yards) 



3 500-1,000 metres (approx. 550 yards-5/8 n.m.) 



4 1- 2 km (approx. 5/8-1 n.m.) 



5 2- 4 km (approx. 1- 2 n.m.) 



6 4-10 km (approx. 2- 6 n.m.) 



7 10-20 km (approx. 6-12 n.m.) 



8 20-50 km (approx. 12-30 n.m.) 



9 50 km or more (30 n.m. or more) 



70 



