🧭 Charting Authority Official Source · Verified Jul 02, 2026 Hydrographic authority: DIGAOHM / Secretaría de Marina (SEMAR) — national nautical charts & publications. 95% Confidence ✓ Confirm 💬 Comment
🧭 Pilotage Requirement & Comms Official Source · Verified Jul 02, 2026 Pilotage required for entry/exit. Pilot service 24h; listening VHF Ch16; operational channel VHF Ch14; pilot craft 39'. 95% Confidence ✓ Confirm 💬 Comment
🧭 Access Channel Dimensions & Signalling Official Source · Verified Jul 02, 2026 Main access channel: 22 km length, template 200 m, depth 12 m; fully signalled. 95% Confidence ✓ Confirm 💬 Comment
🧭 Tidal Regime Official Source · Verified Jul 02, 2026 Tides: mixed, semidiurnal; range ~1.90 m. Pleamar max 1.64 m; bajamar min -0.53 m (reference NBMI). 90% Confidence ✓ Confirm 💬 Comment
🧭 Entrance Shoal / Bank Official Source · Verified Jul 02, 2026 A deltaic shoal lies outside the bay orientated SW–NE and spans the entrance up to the recalada (leading) buoy; channel is bifurcated. 90% Confidence ✓ Confirm 💬 Comment
🧭 Aids To Navigation (Entrance) Official Source · Verified Jul 02, 2026 Port equipped with recalada (lead‑in) buoy, enfilations/leading marks, numbered buoys, a lighthouse and a racon; channel signalled. 90% Confidence ✓ Confirm 💬 Comment
🧭 Notices To Mariners / Local Updates Official Source · Verified Jul 02, 2026 DIGAOHM publishes monthly 'Avisos a los Marinos' including Topolobampo entries (dredging, buoys, temporary works). 90% Confidence ✓ Confirm 💬 Comment
🧭 Access Restrictions (Navigation) Official Source · Verified Jul 02, 2026 No restrictions reported in the principal navigation channel; the secondary channel has been recently relocated. 85% Confidence ✓ Confirm 💬 Comment