[ 76 ] 
ferles to the fouth weft, and the other to the north 
eaft of them j but, the north eaftern feries lying 
tov/ards the land fide, a few of the inner fegments 
might be omitted as being unneceftary. 
From the point C are drawn lines in the diredlioii 
of fixteen of the points of the compafs ; every other 
point being omitted in order to make the chart more 
diftindl; for no greater nicety is in general wanted, 
than what thefe will afford j near the extremities 
however of two of the fands, where it may perhaps 
be more neceffary, I have added a fhort line to mark 
the intermediate point. 
I fhall now endeavour to illuftrate the whole bv 
an imaginary ftiip’s courfe. Let us fuppofe then a 
ftiip to enter the fpace, reprefen ted upon the chart, 
from the north, and finding the light C to bear nearly 
fouth weft, and the two lights to fubtend an angle 
■^of about 5°, fhe will know herfelf to be fomewhere 
about the place D, a little lefs eafternly, than the 
point of the fand denominated crofs ridges and broken 
ground, and at the diftance of about two miles and 
a quarter from it, as may appear by the fcale; fhe 
muft therefore fteer fomewhat to the eaftward of the 
fouth, and, having run about three quarters of a mile, - 
fhe will find the light C to bear weft fouth weft, and 
the two lights to fubtend an angle of exactly 5°, being 
now in the interfedion of the courfe, delineated upon 
the chart, with the fegment fo marked ; but not be- 
ing yet far enough to the eaftward, ftie muft ftill con- 
tinue the fame diredion, till, having run near three 
quarters of a mile farther, fhe will find the two lights 
fubtending an angle of no more than 4"", and the light 
C lying a little to the fouth ward of the weft. From 
hence 
