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Product leaflet Photogrammetry (Dutch)
Product leaflet Photogrammetry (English)

Articles in Hydro International (November/December 2008) on the alignment of motion sensors:
The MRU and SRF aligned (I)
The MRU and SRF aligned (II)
The MRU and SRF aligned (III)

Published in 2012 in the same journal:
Water Crossing Surveys at a New Level

Published in 2014 in the same journal:
Error in GNSS Augmented Heading Systems: Influence of Attitude