I have heard that several boats have sustained damage by hitting a submerged log at the south entrance to the Swinomish. If you are bringing your boat to the American Tug facility in La Conner this is on the route. The USCG recently published this in the District 13 Notice to Mariners. These submerged items can be particularly dangerous to twin-screw or inboard/outboard configurations where the prop is exposed.
WASHINGTON – STRAIT OF JUAN DE FUCA TO STRAIT OF GEORGIA – SWINOMISH CHANNEL SOUTH ENTRANCE – Submerged
The USCG has verified a submerged tree is in the Swinomish Channel South Entrance in the vicinity of the northeast side of Swinomish Channel
South Entrance Lighted Buoy 2 (LLNR 18790). The tree was photographed at a +0.4 foot tide at approximately 48-21.6676N, 122-33.2537W.
The USACE is working on removing the tree. If the tree can be removed from the channel, a BNM will be released informing mariners of the
channel status. Mariners transit at the slowest safe speed, and use extreme caution.
Chart 18427 LNM: 13/14
via USCG Local Notice to Mariners
Thanks to Bitterend Blog for the graphic, I just want to get the message out.