🧭 Charting Authority Official Source · Verified Jul 01, 2026 NOAA Office of Coast Survey is U.S. charting authority; use NOAA nautical charts/ENCs for Anacortes area. 98% Confidence ✓ Confirm 💬 Comment
🧭 Sailing Directions Reference Official Source · Verified Jul 01, 2026 U.S. Coast Pilot 10 (Chapter 7) provides official sailing directions for Rosario Strait/Guemes Channel/Anacortes. 95% Confidence ✓ Confirm 💬 Comment
🧭 Tidal Currents And Eddies Official Source · Verified Jul 01, 2026 Currents in Guemes Channel may exceed 5 knots; flood (east) can form an eddy between Guemes east end and Cap Sante; west countercurrent along Fidalgo ~200 yds. 95% Confidence ✓ Confirm 💬 Comment
🧭 Pilotage And Towage Official Source · Verified Jul 01, 2026 Pilotage compulsory for vessels except those under enrollment/coasting trade; Puget Sound Pilots serve area; tugs via Marine Exchange of Puget Sound (VHF ch 9 & 20). 95% Confidence ✓ Confirm 💬 Comment
🧭 Entrance Character Official Source · Verified Jul 01, 2026 Guemes Channel: ~3 miles long, ~0.5 mile narrowest; depths 8–18 fathoms; lighted buoys mark west entrance. 94% Confidence ✓ Confirm 💬 Comment
🧭 Submerged Hazard City Of Seattle Rock Official Source · Verified Jul 01, 2026 City of Seattle Rock: covers 1.5 fathoms; located ~200 yards offshore on south side of channel, ~2 miles east of Shannon Point. 94% Confidence ✓ Confirm 💬 Comment
🧭 Anchorage And Wharf Currents Official Source · Verified Jul 01, 2026 Ship Harbor bottom is poor holding; considerable current along port wharves (east flood, west ebb); advise docking at slack water or against current. 94% Confidence ✓ Confirm 💬 Comment
🧭 Shannon Point Light Sound And Shoal Official Source · Verified Jul 01, 2026 Shannon Point: low, rounding; marked by light and radio-activated sound signal (key mic 5 times on VHF-FM ch 81A); shoal extends NW from point. 93% Confidence ✓ Confirm 💬 Comment