🧭 Primary Nautical Chart Official Source · Verified Jul 02, 2026 NOAA Chart 13292 — Portland Harbor and Vicinity (ENC US5ME10M). 95% Confidence ✓ Confirm 💬 Comment
🧭 Pilotage Requirement Official Source · Verified Jul 02, 2026 State pilotage required for all foreign vessels and U.S. vessels under registry with draft ≥ 9 ft. 95% Confidence ✓ Confirm 💬 Comment
🧭 Prominent Entrance Hazard Aid Official Source · Verified Jul 02, 2026 Ram Island Ledge — marked by Ram Island Ledge Light (Fl(2)W 6s, fog horn); position approx 43°37'53.3"N 70°11'14.6"W. 95% Confidence ✓ Confirm 💬 Comment
🧭 Entrance Channel Character Official Source · Verified Jul 02, 2026 Dredged entrance channel ~9,000 ft long, 45 ft depth, 1,000 ft width from SW Casco Bay to Fore River turning area. 90% Confidence ✓ Confirm 💬 Comment
🧭 Tides And Currents Summary Official Source · Verified Jul 02, 2026 Casco Bay tidal range ~9 ft; currents stronger between island channels and variable in island reaches and Fore River. 90% Confidence ✓ Confirm 💬 Comment
🧭 Operational Restrictions Security Zones Official Source · Verified Jul 02, 2026 COTP Portland enforces security/regulatory zones (e.g., 100‑yard/200‑yard passenger vessel zones); permits or COTP clearance may be required. 90% Confidence ✓ Confirm 💬 Comment
🧭 Pilot Boarding Area Operator Source · Verified Jul 02, 2026 Pilot boarding area: 2‑mile radius centered 43°31'36.6"N, 70°05'30.0"W (Papa Buoy). 85% Confidence ✓ Confirm 💬 Comment