Navigation School in Goteborg

[Nancy Wiberg Jones]

Hello!
 
I am seeking information on my great-grandfather, Gustav Emanuel Enberg, f. 1852, Vänersborg. I know that he was born out-of-wedlock.  To date, I have not been able to find any information on his father through parish records.  
 
I know that he attended Navigation School in Goteborg in 1890. The name on his certificate is Gustav Emanuel Eneberg.  Does anyone know if there are any records from this school still in existence and how I might access them?  Perhaps he was required to list his father's name on the school application?
 
Best regards,
 
Nancy

[Elisabeth Thorsell]

The records for the Navigation School are in the Regional archives (Landsarkivet) of Göteborg, but they are not microfilmed.  
 
I have looked at those for a relative in the 1840s, and they did give his grade in class, but nothing on his family.