In early September, 1983 ISEE-3 made a long traversal of the distant dawnside magnetosheath starting near x=-150 RE downstream. The distant magnetosheath often contains moderately intense plasma wave emissions at frequencies from several hundred Hz to 5 kHz. However, over time scales of many days, a clear correlation exists between the occurrence of the plasma waves and the cone angle (&thgr;xB) between the magnetic field and the plasma flow velocity (x-direction). For &thgr;xB large (small), the plasma wave amplitudes are near background (high). Sudden (<1 minute) changes in the local magnetic field orientation produce correspondingly sudden changes in the wave amplitudes. Statistically, the wave amplitudes decrease continuously with increasing &thgr;xB. ¿ American Geophysical Union 1994