22. Once the survey is complete, the solid state memory is removed from 

 the Zeiss, and the data are transferred through a Zeiss interface to a main- 

 frame, desktop, or minicomputer. Because the system only requires proper aim 

 from the operator, instrument reading errors and fieldbook entry errors are 

 eliminated. 



23. A unique feature of the Zeiss system is its ability to accept and 

 record an additional piece of information (up to seven digits) with every 

 survey point. This was used to manually enter the angular tilt of the CRAB, 

 which was measured with two orthogonal tilt meters. Up to 14 deg of tilt was 

 recorded on steep portions of the beach. The survey data were adjusted during 

 processing to account for the tilt. 



200 400 600 



DISTANCE, M 



Figure 6. Results of 10 repetitive surveys of a single 

 profile line using the CRAB/Zeiss system 



13 



