ANCHOR 



COLLECTION PIT 



Figure 6. Small river with moderate depth of 15 to 20 ft. (4.6 to 6.1 m) 

 and moderate to fast current of 3 to 4 kn (5.6 to 7.4 km/h). 



Figure 7. River of moderate to deep depth and fast current of 76 kn 

 (140.8 km/h). 



74 



