Calder, Brian, Shannon Byrne, Bill Lamey, Richard T. Brennan, James D. Case, David Fabre, Barry Gallagher, R. Wade Ladner, Friedhelm Moggert, and Mark Paton. 2005. “The Open Navigation Surface Project”. The International Hydrographic Review 6 (2). https://journals.lib.unb.ca/index.php/ihr/article/view/20701.