1. Marine Systems Sales, Measutronics Corporation, 1100 Dexter Ave. N., Ste. 100, Seattle, WA 98109
2. Assistant Professor, Geomatics Program, Univ. of Florida, Gulf Coast, REC/Plant City, 1200 N. Park Rd., Plant City, FL 33563 (corresponding author).
3. Associate Professor, Geomatics Program, Univ. of Florida, 305 Reed Laboratory, P.O. Box 110565, Gainesville FL 32611-0565.
4. President, Measutronics Corporation, 4020 Kidron Rd., Ste #9, Lakeland, FL 33811.