CONTENTS 



FIGURES-Continued 



Page 



19 Sand bed to seaward at end of test 1 36 



20 Relief pipe on sand bed and remains of structure 1 36 



21 First layer of bags (test II) 37 



22 Wave approaching breaking during wave condition d 38 



23 Wave breaking during wave condition d 38 



24 Test II. Changes in structure II average profile for four wave 



conditions 39 



25 Backface and damaged bags at end of test II 40 



26 Damaged bags at end of test II 40 



27 Front face at end of test II 41 



28 Sand bed to seaward at end of test II 41 



29 Repairs to structure II and first layer of bags for structure 



III 42 



30 First layer of bags (test III) 42 



31 Breakwater crest before wave action 44 



32 Breakwater crest under wave trough during wave condition a . . . 44 



33 Test III. Changes in structure III average profile for 



four wave conditions 45 



34 Additional layer after 10 waves, wave condition a 46 



35 Breakwater crest under wave trough during wave condition c . . . 46 



36 Wave breaking on structure during wave condition c 46 



37 Front face at end of test III 47 



38 Backface at end of test III 47 



39 Damaged bags in front face at end of test III 48 



40 First layer of structure IV on front face of structure III. ... 48 



6 



