An AN/SRN-9 integral Doppler equipment, developed by the Applied Physics Laboratory of the Johns Hopkins University to give a ship's position at sea when used with navigation satellites, was used on Robert D. Conrad for 9 months in the Atlantic, Pacific, and Indian oceans. The results obtained illustrate the excellent internal consistency of satellite navigation results. The Eotvos corrections (for gravity reductions) obtained by satellite navigation differ by as much as 5 mgal from those obtained by celestial nagivation in the examples shown. Comparison of the results of satellite and dead-reckoning navigation gives numerous and internally consistent indications of surface currents which are probably accurate to a fraction of a knot.