Propagation of electromagnetic waves has been studied within the defence research project in the C4ISR and EW area Wave propagation analysis of radio, radar and electro optical waves, with concentrations on naval environments during 2001-2003. Methods and models to analyze wave propagation together with meteorological models and methods to enhance the precision and quality of input data to the wave propagation models have been studied. The main purpose has been to improve upon the existing LBM-model (refractive index model) through alternative to ray trace models as PEmodel (parabolic equation solver) and investigate methods and ray trace models for optical wave propagation. The meteorological methods of measuring as rocket sounders, water surface temperature measurement with IRtechniques and meteorological methods (the SMHI HIRLAM-model) for predicting the atmospheric parameters as temperature and humidity. An international collaboration through WEAG/CEPA organizations is included within the project; Duct Mapping Improvement based on Atmospheric Data Fusion for Naval Purposes, CEPA 1.19. Participators are France, Great Britain, The Netherlands, Germany and Sweden. The study recommends a continuation of the work within the field with more emphasis on verification of the models, continuation of the meteorological methods and models and of the work with optical wave propagations.