Rotary spectral properties were examined using ~20 records of yearlong current observations in the Bay of Biscay. Here data are discussed from two representative records from 1000 m above the bottom at two sites, one above the continental slope and another above the abyssal plain. Nearly raw spectra revealed a strong prevalence for clockwise over anti-clockwise circular motions at frequencies (σ) between ~0.85f < σ < N (f and N denoting the local inertial and buoyancy frequencies, respectively). The observations showed rotary properties that were previously associated with free internal waves (for f < σ < N, N ≫ f), but only for motions in bands of ~0.9 cpd width in frequency around inertial, tidal, and their nonlinear sum-interaction frequencies. This width was larger than the enhanced kinetic energy bands of ~0.15 cpd around inertial and tidal constituent frequencies. Nevertheless, it was suggested that both bands were associated with the same nonlinear interactions due to advection between subinertial and peak-frequency motions that also resulted in internal wave intermittency.