2019 Haro Strait and Boundary Pass voluntary vessel slowdown trial

Working together to reduce underwater noise effects on whales

Since 2014, the Vancouver Fraser Port Authority-led Enhancing Cetacean Habitat and Observation (ECHO) Program has undertaken numerous collaborative research initiatives to better understand and manage the cumulative effects of shipping activities on whales in our region, in particular the southern resident killer whale.

The marine transportation industry has been an instrumental partner in many of these initiatives, including voluntary vessel slowdown studies, which began in 2017. Underwater noise from ships can interfere with whales’ ability to hunt, navigate and communicate, but slowing ships down can reduce that noise. Ship slowdown studies and other research are helping to inform the development and implementation of measures that reduce the effects of marine traffic on this iconic species.

About southern resident killer whales

Southern resident killer whales are listed as endangered under both the Species at Risk Act in Canada and the Endangered Species Act in the U.S. Since last year, the population has declined to 75 individuals. Over the last year, both countries’ governments have continued to highlight the need to develop and implement measures to reduce underwater noise generated by ships.

In May 2018, the federal minister of fisheries and oceans and the minister of the environment and climate change formed the opinion that southern resident killer whales face imminent threat to survival and recovery. In October 2018, the Government of Canada announced measures have been taken, continue to be taken, and will be taken by government and others to address three imminent threats to the survival and recovery of the whales. Voluntary vessel slowdowns of large commercial piloted ships in Haro Strait and other zones were referenced with respect to reducing the threat of acoustic disturbance.

About the slowdown trials

In both 2017 and 2018, voluntary ship slowdowns were conducted in Haro Strait, a key feeding area within southern resident killer whale critical habitat. This research demonstrated that reducing ship speeds is an effective way of reducing both the underwater noise generated at the ship source and total underwater noise in nearby habitats, which is, in turn, predicted to benefit the behaviour and feeding success of the southern resident killer whale.

During the trials, temporary underwater microphones, known as hydrophones, were installed on the sea floor under the inbound and outbound shipping lanes to measure underwater noise from ships. Hear what one of our participating ships sounds like before and during the slowdown trial.

Before the slowdown

Courtesy of ECHO Program

During the slowdown

Courtesy of ECHO Program

The number of ships participating in the slowdown increased from 61 per cent in 2017 to 87 per cent in 2018, which demonstrates the marine transportation industry’s ongoing commitment to reducing underwater noise levels from ships and supports the recovery of the southern resident killer whale population.

See background information and final reports for past voluntary vessel slowdown trials below:

2019 voluntary vessel slowdown trial – Now activated

In 2019, the ECHO Program, working in close collaboration with marine transportation industry partners, is coordinating the implementation of another voluntary vessel slowdown trial over an expanded geographic area that includes both Haro Strait and Boundary Pass, which was identified by Fisheries and Oceans Canada in 2019 as key killer whale foraging areas.

The goal of the trial is to maximize the benefits to the southern resident killer whales by ensuring as many ship operators as possible participate in the trial by slowing their ships down. Ship operators are encouraged to transit at reduced speeds through the Haro Strait and Boundary Pass voluntary vessel slowdown trial area where safe and operationally feasible.


  • Haro Strait and Boundary Pass. In 2019, Fisheries and Oceans Canada identified both Haro Strait and Boundary Pass as ‘Key Foraging Areas’ for southern resident killer whales
  • The total distance of the 2019 voluntary vessel slowdown trial area is 29.6 nautical miles, an increase of 15.1 nautical miles from previous ECHO Program ship slowdown trials
  • The trial area includes:
    • Two optional slowdown areas where vessels should only participate if it is navigationally safe for them to do so
    • Transition zones before and after the trial area where ships are encouraged to slow down to the appropriate speed prior to entering the trial area
  • Download a full sized map here


  • A whale monitoring period began on June 1, 2019 and the slowdown began on July 5 when the southern resident killer whales were confirmed in the area by hydrophone data and trusted observers.
  • The slowdown trial will continue to September 30, 2019 with two-week extensions to no later than October 31 if the whales are still confirmed present in the area

Speed targets:

  • 14.5 kn or less speed through the water for vehicle carriers, cruise and container ships
  • 11.5 kn or less speed through the water for bulkers, tankers, ferries and government ships
  • Transiting at these reduced speeds could add between 16 and 28 minutes to the total transit time, depending on the ship type


  • Aiming for at least 80 per cent of ships to participate by slowing to the appropriate speed through water targets for their ship type
  • Regular updates about the trial and participation levels will be provided via the participant newsletter. Please note, this is a technical update intended for participants of the ECHO Program’s underwater noise reduction initiatives. For general program updates, please subscribe to the ECHO Program newsletter.  

Monitoring and reporting

  • The ECHO Program will monitor underwater noise levels before, during and after the trial using hydrophones located at Lime Kiln and Boundary Pass. Southern resident killer whale presence will be monitored and recorded by hydrophone and human observers. Participation rates will be reported by the Pacific Pilotage Authority and monitored by AIS data. At the end of the slowdown period, the ECHO Program will conduct an analysis to evaluate the trial’s effectiveness.


Success requires collaboration

The logistics of coordinating a voluntary vessel slowdown trial outside of the port authority’s jurisdiction are complex and involve collaboration with many others including federal agencies, shipping associations, ship agents and operators, pilots, and others. The ECHO Program team is very grateful for the ongoing participation and support of our many partners who contribute to the continued success of these kinds of voluntary initiatives.

Participating organizations

The following companies have confirmed their support or intent to participate in the 2019 voluntary vessel slowdown trial, where operationally and economically feasible, on a transit-by-transit basis.

AAL Shipping Island Tug and Barge Royal Canadian Navy
ACGI Shipping Inc. “K” Line Royal Caribbean International
BC Coast Pilots LBH Shipping Canada Inc. SAAM SMIT Vancouver Inc.
Canadian Coast Guard Maersk Line Saga Welco AS
Canpotex Shipping Service Mason Agency Ltd. Seabourn Sojourn
Canship Ugland Ltd McLean Kennedy Seaspan ULC
Carnival Cruise Line Mediterranean Shipping Company (MSC) Shipping Federation of Canada
Celebrity Cruises MOL (Americas) LLC Sinotrans Canada Inc.
Chamber of Shipping MOL Chemical Tankers America Inc Swire / CNC Shipping
Champion Tankers AS Montship Inc. Teekay Shipping
CMA CGM Navitrans Shipping Agencies West Inc. The China Navigation Co. Pte. Ltd
Colley West Shipping Ltd Neptune Bulk Terminals (Canada) Ltd. Tormar Shipping Agency
COSCO Shipping Line Canada Inc Nissan Motor Car Carrier Co.,Ltd. Trans-Oceanic Shipping
Cruise Lines International Association – North West & Canada NORDEN Shipping (Canada) Transport Canada
Crystal Cruises Norton Lilly International Inc. US Coast Guard
CSL Americas Norwegian Cruise Line Valles Steamship (Canada) Ltd.
Disney Cruise Line Oak Maritime Vancouver Island Agencies
Evergreen Shipping Agency (America) Corporation Ocean Network Express (Canada) Inc Varamar Shipping & Trading
Fairmont Shipping (Canada) Ltd Oceania Cruises Washington State Ferries
Fednav Limited Oldendorff Carriers Waterfront Shipping
G2 Ocean OOCL Westward Shipping Ltd.
Hapag-Lloyd Pacific Basin Shipping Westwood Shipping Lines
Holland America Line Pacific Merchant Shipping Association Wheelhouse Shipping Agency
Hudson Shipping Lines Pacific Northwest Ship & Cargo Services Wilhelmsen Ships Service
Hyundai America Shipping Agency Inc. Pacific Pilotage Authority Windstar
Hyundai Merchant Marine Princess Cruise Line World Logistics Service (U.S.A.) Inc.
Inchcape Shipping Services Inc. Regent Seven Seas Cruises Yang Ming Marine Transportation Corp.
International Ship-owners Alliance of Canada Robert Reford Zim Integrated Shipping Services

Additional information

Here are a few links and additional resources where you can learn more about what is being doing to help the whales in our waters.

Some of our partners have resources available online:

  • An underwater hydrophone is operated by the Whale Museum and SMRU Consulting Ltd. just off Lime Kiln State Park, San Juan Island and is supported financially by the ECHO Program for our research. Listen live at stream101.com/start/smrucons/
  • Have you spotted a whale? Report your cetacean (whale, dolphin, or porpoise) and sea turtle sightings to the B.C. Cetacean Sightings Network through their WhaleReport app, on their website or by email.
  • The Whale Trail organization has established a network of land-based viewing sites on the west coast of Canada and US. See the Whale Trail maps at thewhaletrail.org

Questions or feedback

For more information on the slowdown please contact the ECHO Program team at [email protected] or Vancouver Fraser Port Authority Operations Centre which is available 24/7 at 604.665.9086. For general program updates, please subscribe to the ECHO Program newsletter or visit the main ECHO Program website for more information.


Participant update#1 – May 31, 2019

Participant update #2 – July 5, 2019

Participant notification: Slowdown has now begun (July 5)

Participant update #3 – July 25, 2019

Participant update #4 – August 8, 2019

Participant update #5 – August 21, 2019