1922] 



MADRAS PEARL FISHERIES 



169 



and forwards between the long sides of the demarcated space 

 in the manner shown in the diagram below, kindly furnished by 

 Capt. Kirkham of the Ceylon Fisheries Department. 



A\ 



B 



^AA 



< 



1 mile 



^ 



Diagram of a rectangular inspection area measuring 2 X 1 mile. A, Position of the 

 inspection slip at the commencement of the days work ; AA, the ship's second 

 position to which she moves during the inspection. The flags represent the posi- 

 tion of the 10 buoys (flagged) laid out to guide the four inspection boats in their 

 courses, which are indicated by red arrow lines. 1, 2, 3, 4 indicate the relative posi- 

 tion of each boat at the beginning of each traverse. 



As the prevailing winds and currents are either from the north or the south, it is desira- 

 ble to buoy the space to be inspected so that the long sides lie north and south ; 

 this insures that the traverses made by the boats, rowing abreast, are equalized as 

 far as possible by being across the wind and current. 



23 



