USS H-1 (SS-28) First World War Submarine is known for the historic wreck of a First World War-era US submarine off Baja’s Pacific coast. It is not a guaranteed wildlife performance: water movement, visibility and encounters vary by season and from one dive to the next, which is why the guide’s local briefing matters as much as the published range.

The minimum experience level shown here reflects the wider site in normal liveaboard conditions. Divers should be comfortable with the listed entry method, maintain controlled buoyancy and carry an appropriate surface marker. If current, swell or depth is stronger than expected, the crew may change the route, move the entry point or choose a different site.

Its exposed Pacific location and historical sensitivity demand experienced boat support and conservative planning. Expedition or liveaboard access avoids a long repeated transfer, but this is a daylight wreck dive and not a casual penetration site.

Naval History and Heritage Command explains the environmental or management context for this part of Mexico. Follow all zoning, wildlife-distance and no-touch rules, and remember that coordinates on this page identify the general site rather than replacing the operator’s current entry position.

For a useful comparison on the same broader itinerary, see Magdalena Bay. Linking the sites makes it easier to understand how crews balance sheltered reefs, exposed pinnacles and seasonal wildlife during a voyage.