Continuously repeated hourly profiles of horizontal velocity have been collected with the Cartesian diver profiler on each side of a front. The location was roughly 100 km west of Point Buchon, California, in a region of the California current dominated by offshore coastal jets and strong eddies. Concurrent temperature records from the quasi-Lagrangin diver indicate that one set of 21 profiles was taken on the southerly side of the front with cold surface water, while an immediately following set of 16 was collected on the other side. For the 3 day collection period, average advection of the diver was .2 m/s to the WNW. The horizontal kinetic energy levels of the profiles are the same for either side of the front, and are 4.2 J/m3, roughly twice the Garrett-Munk model level, but these also include subinertial baroclinic velocities. Cross spectral analysis of the repeated profiles is used to determine the dominant intrinsic rotation frequencies of horizontal velocity for vertical wavenumbers between .00625 and .019 cpm. In the absence of local vorticity, this would be expected to be the local inertial frequency f. On the cold (southerly) side of the front, most rotation frequencies were above f, while most were below f on the warm side. The mean frequencies were 1.18f and 0.78f. The difference between these dominant intrinsic frequencies and f can be attributed to local relative vorticity. These vorticity estimates are consistent with the westward advection of the diver being due to positions first south of then north of the central region of an offshore jet. ¿ American Geophysical Union 1987