- Fax
- (613) 267-7085
- DONALD KNUDSEN President
- JUDITH KNUDSEN Vice President
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Listing updated 11 October 2026
Knudsen designs, manufactures, and supports single-beam and deep-water echosounders for hydrographic surveying, marine navigation, and scientific ocean research. Their products serve government agencies, commercial surveyors, and research institutions worldwide, providing hardware, software, and technical assistance from their Perth, Ontario headquarters.