in Part 9. 



As one last check on the quality of our SWOP data we had one more 

 contouring job done by Hydro. This time the reference level was deter- 

 mined by selecting points that had been leveled statistically. This leveled 

 contoured model was forwarded in May 1956 along with an evaluation of the 

 photogrammetric work. As mentioned beforeg, the work done by the Photo- 

 grammetry Division of the U. S. Navy Hydrographic Office is described in 

 Part 6 of this report. 



And so, after 33 months and a correspondence file at ONR two and one- 

 half inches thick, as of June 1956 SWOP has been completed except for the 

 task of interpreting results, drawing conclusions from them, and, pre- 

 paring this report. 



17 



