This report describes the activities in the project Robust Navigation during year 2005. The main activities has been the construction of an experimental platform for validation of integrated navigation algorithms and investigation of Micro-Electro-Mechanical System (MEMS)IMU sensors with specific focus on determining error parameters. One loose and one tight GPS/INS (Inertial Navigation System) integration algorithm has been tested using the experimental platform in both low- and high-dynamics environments. The project Robust Navigation presented a contribution at the international workshop Urban Warfare Workshop arranged by FMV in May 2005, and as an article published in the Swedish Journal of Military Technology, December 2005.