Juan de Fuca Strait has constant Marine Traffic.
The following links are to Automatic Identification System (AIS) tracking sites:
The Automatic Identification System (AIS) is an automatic tracking system used on ships and by vessel traffic services (VTS) for identifying and locating vessels by electronically exchanging data with other nearby ships, AIS base stations, and satellites. AIS information supplements marine radar, which continues to be the primary method of collision avoidance for water transport.
The International Maritime Organization’s (IMO) International Convention for the Safety of Life at Sea (SOLAS) requires AIS to be fitted aboard international voyaging ships with gross tonnage (GT) of 300 or more, and all passenger ships regardless of size.
During the Swiftsure race, Vessel Traffic Services broadcasts on Channel 09 at 15 minutes and 45 minutes past the hour, the location, direction, and steaming speed of large vessels operating under the VTS system using Swiftsure’s Grid Map (see link to Swiftsure Grid Map below).