HKIMtKSKM AT1\ K OltSI .K\ Id) W Cll{\KS 



57 



350 360 370 380 390 400 340 350 360 370 



M 



Figure 11. M curves over the ocean at Antigua, British West Indies. 



380 390 400 



detail the structure of the low maritime duct which experiments at Antigua in the West Indies which 

 in this case is only about 30 ft high. 225 This type of are reported in Chapter 8. Two typical soundings 

 duct has been studied carefully in the transmission taken near Antigua are reproduced in Figure ll. 194 



