Version 1.0 of the GSC doesn't have anything brighter than 7. If zero, progress of the search is not logged. If -print is set, progress is not logged. Start new or append to most recent output file. Magnitude errors may be introduced when B and V plates are averaged together.
Galactic coordinates are always ouput as degrees instead of hours.
The GSC uses fractional degrees internally. Turn verbose mode on or off. Command line parameter changes will be echoed if this is on, as well as additional progress logging. This is useful if the program is apparently misbehaving. Stop processing of command line and exit from program without performing Guide Star Catalog search.