ILLUSTRATIONS (Continued) 



Figure Page 



5. Amphibious LARC XV towing radiation detector vehicle 

 entering surf 



6. Onboard data acquisition system 11 



7. Computer listing of RIST data 12 



8. Detail of study area 14 



9. Profiles normal to the shore 15 



10. Schematic illustration of RIST tracing operations 16 



11. Pattern of xenonated sand immediately after release 18 



12. Pattern of xenonated sand approximately 24 hours after 

 emplacement 20 



13. Littoral transport summary, xenon experiments 21 



14. Sea and swell summary, xenon experiments 22 



15. Location of cores along profiles 50 feet upcaost 23 



16. Dispersal pattern of gold-tagged sand approximately 2 hours 



after injection ..... 26 



17. Dispersal pattern of gold-tagged sand approximately 4 hours 



after injection 27 



18. Dispersal pattern of gold-tagged sand approximately 23 hours 

 after injection 28 



19. Dispersal pattern of gold-tagged sand 2 hours after injection 29 



20. Dispersal pattern of gold-tagged sand observed approximately 



1 hour after the pattern depicted in Figure 19 30 



21. Pattern of gold-tagged sand observed 4 days subsequent to 



the survey depicted in Figure 20 31 



22. Littoral drift summary, gold experiment 32 



23. Sea and swell summary, gold experiments 33 



24. Changes in radioactive gold 198-199 spectrum resulting from 

 burial of non-radioactive (dead) sand . 37 



25. Comparison of tagged sand dispersal patterns 43 



