11 



Code Table XI 



Symbols bb — Barometer change 



Code Table XII 



Symbol V — Visibility 



Code 

 figures 



Visibility 





 1 

 2 

 3 

 4 

 5 

 6 

 7 

 8 

 9 



Dense fog. (Objects not visible at 50 yards.) 



Thick fog. (Objects not visible at 200 yards.) 



Fog, (Objects not visible at 500 yards.) 



Moderate fog. (Objects not visible at }i nautical mile.) 



Mist or haze, or very poor visibility. (Objects not visible at 1 nautical mile.) 



Poor visibility. (Objects not visible at 2 nautical miles.) 



Moderate visibility. (Objects not visible at 5 nautical miles.) 



Good visibility. (Objects not visible at 10 nautical miles.) 



Very good visibility. (Objects not visible at 30 nautical miles.) 



Excellent visibility. (Objects visible at more than 30 nautical miles.) 



