Ushuaia and the Beagle Channel

Check current Prefectura recreational nautical zones and operator registration for the exact location, especially islands and the Monte Cervantes vicinity. Require cold-water experience or supervised drysuit instruction, guide-to-diver ratios, functioning redundant communication, oxygen and first aid, rescue-capable boat and an agreed abort signal. Winter water is reported near 2°C to 4°C; hypothermia, cold shock, current, kelp entanglement and surface chop are serious risks. For breath-hold activities, do not infer safety from scuba or surface snorkel programs: use trained apnea rescue supervision and never practice alone or hyperventilate. Ask about harbor closures and real-time marine forecasts. For divers without symptoms of decompression sickness, DAN suggests a minimum 12 hours after a single no-decompression dive before flying and 18 hours after multiple/repetitive dives, with longer margins after decompression obligations; more conservative plans reduce risk. Seek urgent medical advice and do not fly if decompression sickness is suspected.

Call local emergency services first for suspected decompression illness, hypothermia or injury and notify the dive operator. Prefectura handles maritime rescue on 106/VHF16; Argentina lists 911 for general emergencies. DAN can advise the treating team via its 24/7 dive emergency number. A 2020 national-government announcement recorded a hyperbaric chamber at Hospital Naval Ushuaia, but it explicitly gave that authorization a five-year validity and no 2026 renewal or current ability to treat divers was verified in this review. Do not assume the chamber is staffed, licensed or accepting civilian cases. Have the operator identify the CURRENT medical referral, recompression option, transport/evacuation chain, coverage and weather limitations before the dive.

Giant kelp forests and benthic invertebrates are the central underwater habitats. Stay off the bottom, use buoyancy control, avoid grabbing kelp, never take crabs, shells or artifacts, and do not feed, chase or touch wildlife. Visit Isla Martillo penguins only through authorized viewing or guided landings, obey distancing rules, and keep out of breeding colonies. Tierra del Fuego National Park has a separate protected-area management and permitted trail/activity system; its presence does not create unrestricted access to Beagle Channel diving. Prefectura determines nautical activity zones and the dive operator must also check local site restrictions. Do not imply that a sea-lion sighting permits a wildlife swim.