  Decameter hectometric (DH; 1-14 MHz) type-IV radio bursts are produced by
flare-accelerated electrons trapped in post-flare loops or the moving magnetic
structures associated with the CMEs. From a space weather perspective, it is
important to systematically compile these bursts, explore their
spectro-temporal characteristics, and study the associated CMEs. We present a
comprehensive catalog of DH type-IV bursts observed by the Radio and Plasma
Wave Investigation (WAVES) instruments onboard Wind and STEREO spacecraft,
covering the period of white-light CME observations by the Large Angle and
Spectrometric Coronagraph (LASCO) onboard the SOHO mission between November
1996 and May 2023. The catalog has 139 bursts, of which 73% are associated with
a fast (>900 km/s) and wide (>60$^o$) CME, with a mean CME speed of 1301 km/s.
All DH type-IV bursts are white-light CME-associated, with 78% of the events
associated with halo CMEs. The CME source latitudes are within $\pm$45$^o$. 77
events had multi-vantage point observations from different spacecraft, letting
us explore the impact of line of sight on the dynamic spectra. For 48 of the 77
events, there was good data from at least two spacecraft. We find that, unless
occulted by nearby plasma structures, a type-IV burst is best viewed when
observed within $\pm$60$^o$ line of sight. Also, the bursts with a duration
above 120 min, have source longitudes within $\pm$60$^o$. Our inferences
confirm the inherent directivity in the type-IV emission. Additionally, the
catalog forms a sun-as-a-star DH type-IV burst database.
