From the Canada Border Patrol, regarding reporting your vessel to the proper authorizes: Planning to "land" your vessel on Canadian soil or did you leave Canadian waters and land on U.S. soil?
All private boaters who intend to land on Canadian soil, or who have departed Canadian waters and landed on U.S. soil, are required to report to a CBSA designated marine reporting site. Upon arrival at a CBSA designated marine reporting site, call the Telephone Reporting Centre (TRC) at 1-888-226-7277 from the phone provided to obtain clearance.
Not planning to "land" your vessel or did you leave Canadian waters but did not land on U.S. soil?
You still need to report to the CBSA. Certain private boaters may contact the CBSA by calling the TRC at 1-888-226-7277 from their cellular telephones upon arrival in Canadian waters. This includes: Canadian citizens and permanent residents who have not landed on U.S. soil; and U.S. citizens and permanent residents who do not plan on landing on Canadian soil. Private boaters that are strictly weaving in and out of Canadian waters but are not in transit, are required to call the TRC only once at the time of their initial entry into Canadian waters.
If this activity changes, i.e., the vessel docks in Canada or takes on new persons or goods while in foreign waters, the boaters must report to a CBSA designated marine reporting site and call the TRC to obtain clearance. All other private boaters, including those without cellular telephones, must proceed to a CBSA designated marine telephone reporting site and place a call to the TRC to obtain CBSA clearance. This includes all vessels carrying individuals who are not Canadian or U.S. citizens or permanent residents.
For more information visit Candian Border Patrol Website: www.cbsa.gc.ca