NL4 & 5

-Cat #------Name----Certainty---Long---Lat-----Diameter---Radar Swath----------------------------------------------------------

 NL5...............................2 ......140.6W 12.1N......30 km-.......T56--
 NL4........................ ......2 ......141.8W  11.0N.....22 km-.......T56--

Neish and Lorenz craters #5 (top) and #4. T56 Radar image.

Dark floors surrounded by narrow bright rims and one crater diameter ejecta deposit. Builds up high enough to stop dunes. Dunes penetrate missing rim segment and enter floor of #4. 

References:
2012: Neish, C. D., and Lorenz, R. D. Titan’s global crater population: A New assessment.  Planet. Space Sci., 60(Jan.), 26–33. doi: 10.1016/j.pss.2011.02.016.