The results of the Vancouver Fraser Port Authority Enhancing Cetacean Habitat and Observation (ECHO) Program's Vessel Slow Down Trial that took place in Haro Strait last summer are in. The voluntary Vessel Slow Down Trial was initiated to study the relationship between slower ship speed, underwater noise levels, and effects on the endangered southern resident killer whales. More than 60 marine shipping organzitions participated in reducing vessel speeds to 11 knots, when safe and feasible to do so. The results from the trial demonstrate that reducing vessel speeds is an effective way of reducing noise generated by the vessel, as well as reducing total underwater noise in nearby habitats. This summer, another volunary vessel slowdown initiative will take place in Haro Strait. This measure will test levels of participation when the vessel slowdown speed is optimized based by vessel class, and will take effect when there are confirmed sightings of southern resident killer whales in the area. The final report from the 2017 trial is now available on the ECHO Program slowdown trial webpage.