During June and July of 1974, internal wave records totaling 21 days duration were made at a nominal depth of 350 m in a location 800 km offshore of San Diego, California. The measurements were made with a midwater capsule which profiles temperature while it drifts with the mean flow. The resulting vertical displacement spectra decrease generally as ω-2 between the local inertial frequency ωi and the buoyancy frequency n with a pronounced peak just below n; outside these limits the spectra drop sharply. Vertical coherences are nearly frequency independent between ωi and n with the exception of a peak just below n corresponding to the peak in the displacement spectrum. A low-frequency (0?ω?0.5n) average of coherence (not squared) decreases linearly from 0.99 at 1-m separation to 0.85 at 36-m separation. This result suggests that modal energy is distributed with mode number j as (j2+j*2)-1, where j*?3. Phase spectra averaged over the same interval indicate little or no net vertical transport of energy. The wave spectra are consistent with those of a stationary Gaussian process for periods up to 12 hours.