Fort Høytorp - plan and layout  

 1. The central part of the fort - Redoubt (main battery) with a turret guns emplacements
2. Strongholds with infantry and gun positions.
 3. Rifle rampart with machine-gun blockhouse.

A. Entanglement
B. Underground tunnels
C. Gun's emplacements

  The central part of the fort - Redoubt
1. Turrets, 2. Ditch, 3. Underground premises - the powder magazine, shelter, etc., 4. Wire fences, 5. Caponiers, 6. Main entrance to the fort, 7. Bridge across the ditch.
the scheme from the site of forthoytorp.com