1. Why understand spectral analysis 2. Relationships between variables 3. Time varying signals 4. Describing signals in terms of frequency 5. Frequency representation of random signals 6. Identifying systems relationships from measurements 7. Some typical applications 8. Wave directionality monitoring 9. Motions of moored structures in a seaway 10. Experimental measurment and time series acquisition 11. Experimental evaluation of wide band active vibration 12. Hull roughness and ship resistance