Conclusion 
Two Australian Authorities are using underwater 35 mm photogrammetry 
for data capture and analysis. The time savings in the field are considerable 
compared to other techniques and the specimens studied are not disturbed or 
destroyed. The use of analytical techniques is essential for accurate results, 
especially since the rigid constraints that apply in aerial photogrammetry 
cannot be applied. 
The author wishes to acknowledge the friendliness, technical and 
financial support of the Hunter District Water Board, the Australian 
Institute of Marine Science, the University of Newcastle and the Australian 
Research Grants Committee. 
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