2:48 PM: Thanks to Chris Frankovich for the photo! That Matson cargo ship (Manulani) is one of the vessels that have sounded horns in the past hour-plus as they navigated through sailboats participating in today’s Duwamish Head Race, organized by the Three Tree Point Yacht Club. While Chris’s photo showed a view from west-facing southwest West Seattle, VesselFinder shows about 20 racers currently off Alki.

ADDED 4:36 PM: Thanks to David Hutchinson for this closeup view of one of the participating boats: