The median reduction was 2.5 dB when filtering only for periods when commercial vessels were within 6 km radius of Lime Kiln. A local hydrophone listening station in Lime Kiln State Park, 2.3 km from the shipping lane, recorded 1.2 dB reductions in median broadband noise (10–100,000 Hz, rms) compared to the Baseline period, despite longer transit. Slowdown results were compared to ‘Baseline’ noise of the same region, matched across lunar months. Analysis of AIS vessel tracking data showed that 350 of 951 (37%) piloted transits achieved this target speed, 421 of 951 (44%) transits achieved speeds within one knot of this target (i.e., ≤12 knots), and 55% achieved speeds ≤ 13 knots. From August 7 to October 6, 2017, the trial requested piloted vessels to slow to 11 knots speed-through-water. 4Vancouver Fraser Port Authority, Enhancing Cetacean Habitat and Observation (ECHO) Program, Vancouver, BC, CanadaĪ voluntary commercial vessel slowdown trial was conducted through 16 nm of shipping lanes overlapping critical habitat of at-risk southern resident killer whales (SRKW) in the Salish Sea.3JASCO Applied Sciences, Victoria, BC, Canada.2Department of Statistics and Actuarial Science, Simon Fraser University, Burnaby, BC, Canada.1SMRU Consulting, Vancouver, BC, Canada.Follow the link below to see the BoatUS Press Release.Ruth Joy 1,2* Dominic Tollit 1 Jason Wood 1 Alexander MacGillivray 3 Zizheng Li 3 Krista Trounce 4 Orla Robinson 4 Coast Guard’s Recreational Boating Manual for VTS Puget Sound at BOAT US recently published a press lease showing two instances where small recreational vessels passed too closely in front of two 600′ cargo ships. Contact commercial vessels in Puget Sound on VHF-FM channel 14/5A or channel 13.VHF-FM radio is monitored by nearby vessels ready to assist. Do not use a cell phone for a distress call.When necessary to communicate your position to a ship, contact commercial vessels by VHF-FM radio using the locally monitored frequency.Narrow passageways restrict movement for large vessels and make it dangerous for ships to alter their courses. Do not enter into the direct path of commercial vessels that are approaching bridges and locks.Never anchor in a shipping lane, and never tie up to a buoy or other navigational aid.Dangerously strong underwater currents (or wheel wash) created by the engines can extend for hundreds of yards from the ship or tugboat. Allow ample room when crossing or traveling behind a ship or tugboat.A pilot’s “blind spot” can extend for hundreds of feet in front of tugboats and towboats pushing barges. Never cross in front of a tugboat or between a tugboat and its tow.Cross traffic lanes at 90 degrees to the prevailing traffic or as practical.Be aware that there may be an unlit space of several hundred yards between bow and stern lights, such as when a tugboat is pushing a barge.Avoid commercial shipping traffic lanes by as wide of a margin as possible.Recreational vessel operators in shipping lanes need to watch for large ships and keep the following in mind. It is important to always allow plenty of space between your boat and the commercial vessel.Ĭommercial ships have limited views from the bridge and require long distances to come to a full stop-often ¾ to 1½ miles. Boating in the Pacific Northwest is about as good as it gets! More likely than not you will constantly see ferries and cargo ships navigating the same waters as recreational water craft.
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