Magnus Bertin Hansen/ Schanke family in Sweden.

[Rob Hansen]

Hi,
 
I have two questions about using swedish sources ....
 
Firstly my great grandfather Magnus Bertin Hansen -  born 1874 Ibestad  - did Military Service with the Swedish Navy around 1896 in Tromso.  How can I find out more about what the navy trained him to do , how long he was in the navy etc.
 
Also I have had great success tracing my family in Norway arriving at    
Daniel Rasmussen  
Birth: 1597
Skrova, Vagan, Nordland, Norway  
Death: 29 Nov 1638
Trondheim, Sor-Trondelag, Norway  
  married to  
 
 
 
   
Maren Jensdatter Skanke  
Birth: 1593
Trondheim, Sor-Trondelag, Norway  
Death: 1644
Trondheim, Sor-Trondelag, Norway  
 
 
 
whose family was from Sweden.
 
Ho can I find out more about the Schanke family in Sweden??  What claims can be made for authenticity at this date??
 
Thankyou very much,