We used four data sets that could be found across the country. That was one of the biggest challenges: finding the navigation data for both commercial and recreational traffic such that it could be comprehensive.
The first one we used was a CHS score, which was generated by analyzing the Canadian Hydrographic Service's nautical charts, specifically their level of service, which is based on risk that is highly correlated not only to the volume of traffic in the waterways but also to the demand by mariners, both commercial and recreational, on their charts.
Another key indicator we used was freight score, which is a very strong indicator of commercial navigation across the country. That data was garnered from Statistics Canada with help from the CBSA and others.
Then we used a navigation work score. The navigable waters protection program, for decades and beyond, has been providing building permits for infrastructure in and around Canadian waters. Within the databases that are used to track those applications, we were able to query the infrastructure that is there to support recreational and commercial navigation, marinas, wharves—