Big salute to Ohmygollygosh!

The link
http://www.christian-wendt.org/tatukgis.zip for the old version of TatukGIS Viewer did the trick! It downloads TatukGIS Viewer Version 1.8.6.341, dated 2/27/2007, which works fine with the .gml files that SH3Gen v0.8.2 generates. The current version of the Viewer is 4.13.2.10935, dated 3/8/2014, and it will not recognize the terrain.gml file that SH3Gen v 0.8.2 generates. AFAIK, there is no version of SH3Gen available at this time that will produce .shp files. Fortunately the link to the old GIS Viewer is still live. Thanks again, Ohmygollygosh, for finding and sharing it.
I'm going to look for a file converter to go from .gml to .shp. If it's a relatively simple task, that would be the way to avoid being stuck with orphan software.
Thank you, everyone else, for your response and assistance. SubSim is a great place, and people like you all, who are always willing to help, make it great!

