🧭 Charted Position Caution Official Source · Verified Jul 02, 2026 Report (1995): Isla San Marcos reported 1.0 mile east of its charted position. 90% Confidence ✓ Confirm 💬 Comment
🧭 Canal De San Marcos - Channel Character Official Source · Verified Jul 02, 2026 Canal de San Marcos about 1.0 mile wide with depths of 6.4 m; passage should not be attempted without local knowledge. 90% Confidence ✓ Confirm 💬 Comment
🧭 Pier / Berth Characteristics Official Source · Verified Jul 02, 2026 T-headed pier on SW side: extends 365 m, berthing face 137 m, depth alongside 9.1 m (used to load gypsum). 90% Confidence ✓ Confirm 💬 Comment
🧭 Pilotage Requirement And Boarding Official Source · Verified Jul 02, 2026 Pilotage is compulsory for arrival and departure; pilots contacted by VHF; usually board from a launch off the pier or off Puerto de Santa Rosalía. 90% Confidence ✓ Confirm 💬 Comment
🧭 Anchorage And Nearby Shoal Official Source · Verified Jul 02, 2026 Anchorage: 15–18 m, sand, ~0.5 mile W of the pier. Alternate anchorage E of Roco Lobos but a shoal 5.5 m lies 1.0 mile E of Roco Lobos. 90% Confidence ✓ Confirm 💬 Comment
🧭 Hazards Near North Extremity Official Source · Verified Jul 02, 2026 Three white islets 3–12 m high and several detached rocks lie about 0.5 mile north of the island's N extremity. 90% Confidence ✓ Confirm 💬 Comment
🧭 Published Coordinates (Reference) Official Source · Verified Jul 02, 2026 Pub.153 reference position: 27°11'N, 112°06'W (useful reference; see position caution). 90% Confidence ✓ Confirm 💬 Comment