Figure 2. Hand lay-up buoy in San Diego Bay after 4 years of service. 

 Note guano staining on side and slight displacement of upper 

 lateral fender. 



Spray-Up Buoy. The spray-up buoy (Figure 3) had continued to 

 deteriorate slightly during the last year. The upper shoulder had numerous 

 cracks in the outer skin from which rust was streaking (Figure 4). Guano 

 buildup and staining were not so great as on the hand lay-up buoy. The 

 exterior shell was cracked through to the polyurethane-foamed core in three 

 places — one normally above the water (Figure 5) and two below (Figure 6). 

 These cracks were over 1 foot in length, but did not permit sufficient passage 

 of water to affect the flotation of the buoy or its service to the Fleet. The 

 middle lateral fender, held in place by a steel cable, had also been displaced 

 (Figure 5) by the impact of a ship. The two test patches in the side (Figure 4) 

 were in good condition. The above superficial damage did not seem to have 

 any effect on the utilization of the buoy. 



