Canada and Sweden have been collaborating on magnetic anomaly detection (MAD) since May 2001 under the Sweden/Canada Defence Research Agreement; Amendment no. 1 on Electromagnetic Surveillance and Silencing. This work has included theoretical studies of MAD detection algorithms and various types of noise reduction. In May 2003, a joint trial was held in Sweden to investigate a number of MAD-related effects including: the coherence between total-field basestations, the coherence between vector and total-field basestations, detection of a magnetic dipole in a geologically spatially variable area from an airborne platform, geological noise reduction methods, and the detection of the aircraft from ground magnetometers. This paper describes the experiment and the results of the analysis obtained so far.