Eeport U. S. F. C. 1884.— Tanner. Albatross. 



PLATE II. 



6S °3o ' 



ZS'hc 



JZS' 



40 



24^30 



Case I. 



^ \ 



So' 4Q 



/ 



e-fao' 



/ 



/ 



39 



X 



^loiunnd Shoal- 



ZS-^a 



/o' 



zs 



40 ' 



6S%o' '^o' 70 65° ^*^' *^' 



24- zo ' 



"30' 



Illustrative case iu navigation. 



