🧭 Charting Authority & Primary Chart Official Source · Verified Jul 02, 2026 CHS Chart 4266 'Sydney Harbour' (scale 1:20,000). Edition 2014-02-28; Last Notice listed 2026-02-20; page updated 2026-06-15. 95% Confidence ✓ Confirm 💬 Comment
🧭 Promulgation & Operational Updates Official Source · Verified Jul 02, 2026 Chart corrections and temporary/navigation updates for chart 4266 are promulgated via Notices to Mariners (NOTMAR) and MCTS; NOTMAR chart-correction search available. 95% Confidence ✓ Confirm 💬 Comment
🧭 Entrance Draft Limitation (Channel Shoal) Official Source · Verified Jul 02, 2026 Access currently restricted to vessels with 11.8 m draft due to sand/gravel deposit in access channel adjacent to South Bar. 90% Confidence ✓ Confirm 💬 Comment
🧭 Local Bathymetry — Sill And South Arm Depths Official Source · Verified Jul 02, 2026 Sill across Seaward Arm min depths ≈12 m (Chart Datum); channel deepens to ≈18 m CD off South Arm proposed berth. 90% Confidence ✓ Confirm 💬 Comment
🧭 Currents, Seiche And Storm Surge Cautions Official Source · Verified Jul 02, 2026 Currents generally weak (~0.2 m/s or less) but can strengthen with wind/events; seiche period 120–150 min (amp up to ≈0.5 m); typical storm residual 0.7–0.8 m; 100‑yr total sea level ≈2.4 m CD. 90% Confidence ✓ Confirm 💬 Comment
🧭 Pilotage — Compulsory & Boarding Positions Trusted Secondary Source · Verified Jul 02, 2026 Pilotage compulsory; request pilot from Atlantic Pilotage Authority ≥12 hrs. Pilot embarkation: Outer Lighted Buoy A 46°22'N 60°08'W; Sydney Marine Terminal boarding 46°18'N 60°08'W. 85% Confidence ✓ Confirm 💬 Comment
🧭 Approach Restriction — Traffic Separation Trusted Secondary Source · Verified Jul 02, 2026 Cabot Strait Traffic Separation Scheme (TSS) is in force; use mandatory separation lanes on approach through Cabot Strait. 80% Confidence ✓ Confirm 💬 Comment