  We have observed the much studied Seyfert 1 galaxy NGC5548 with the GHRS
spectrometer on HST. Our 14ksec observation covers the CIV emission line at a
resolution of >20,000. Our purpose was to study the absorption line found at
lower resolution by IUE and HST/FOS. We found that the CIV absorption line
resolves into 6 separate doublets with EWs of 0.07\AA--0.38\AA. The absorption
lines have blueshifts relative to the systemic velocity of the galaxy of 380 --
1250 km/s, except for one which has a redshift of 250 km/s, suggesting both
inflow and outflow. The inflowing component may be related to the accretion
flow into the nuclear black hole. All the doublet lines are resolved by the
GHRS. Three doublets are narrow with FWHM\lax100 km/s, and three are broad,
FWHM \sim 160--290 km/s . We find evidence of partial covering by the narrow
absorption lines. Either (but not both) of the two strongest broad doublets
could be from the same material that produces the X-ray ionized absorber seen
in soft X-rays. The remaining five systems must be at least 10 times less
ionized (and so of lower total column density) to remain consistent with the
X-ray spectra.
