CHAP. XXI.] SURVEYING FLOATING BEACONS 



4-75 



These large-sized flags require to be spacially strengthened 

 with sacking or canvas material about 6 inches wide, sewn 

 on both sides of the cahco along the length of the leech nearest 

 the beacon spar. In addition, goring pieces should extend 

 along the top and bottom for 18 inches. The edges of the flag 

 are hemstitched throughout, including the edges of the com- 



Fig. ii6. 



ponent parts. Such design best withstands the strain occa- 

 sioned in a strong wind, and if so constructed will last a long 

 time (first gradually frajdng from the fly), and are well worth 

 the additional time involved in making them. 



When the loss of time that is involved should it become 

 necessary to replace any beacon owing to the tattered con- 

 dition of the flag is remembered, it will be seen that much 



