John Dunlap provides the real-time data acquisition firmware for many oceanographic instruments. All are used to estimate the ocean's water velocity using electric field measurements in the ocean. Another of John's interests is automatic determination of hard and soft iron near instrument compasses using in-situ data. The result is a compass calibration that can be determined in one location and used anywhere in the world. His data acquistion systems using Linux have recorded time-stamped serial data from many diverse instruments aboard ship to provide real-time synchronized data from a broad array of instrumentation aboard research ships to support oceanographic cruises. Mr. Dunlap has been with the Applied Physics Laboratory since 1979.