I I 



150 

 AP 



A 



rKfi 



Location of Stereocameras 



' r 'i i 1 i i' i 'i 'i i 



Figure 2 - Inboard Profile of USCGC UNIMAK Showing Location of Stereocameras 



Location of Stereocameras 



Figure 3 - Inboard Profile of USS VALLEY FORGE (CVS 45) Showing 

 Location of Stereocameras 



Basic Characteristics 



Midship Section Moment of Inertia 27,502 ft 4 



Midship Section Modulus 129,210 ft in. 2 

 Block Coefficient 0.585 



Prismatic Coefficient 0.597 



Midship Section Area Coefficient 0.980 

 Waterplane coefficient 0.743 



STEREOPHOTOGRAPHS OF SEA SURFACE 



In order to evaluate the accuracy of the Weather Bureau wave estimates and their use- 

 fulness in the statistical analyses of ship strength, stereocameras were installed on the 

 USCGC UNIMAK (WAVP 379) and the USS VALLEY FORGE (CVS 45). Figure 2 shows the 

 camera locations on the weather ship, and Figure 3 shows those on the aircraft carrier. 

 Table 3 gives identification and installation data for the cameras. 



Visual estimates of the sea surface were made by trained observers at the same times 

 that stereophotographs were taken. The UNIMAK estimates were made by regularly assigned 

 Weather Bureau observers. The VALLEY FORGE estimates were made by trained Navy aero- 

 logical personnel; two or more of them made independent estimates twice each hour during 

 most observation periods. By special arrangement, five or six of the Navy aerological per- 

 sonnel made independent wave estimates three times each day. Subsequently, the VALLEY 



