Remote-Site Emergency Response After a Missed Deco Stop
You are inspecting a dive operation at a remote freshwater lake used for advanced recreational dives. The site is 45 minutes by gravel road from the nearest town, with no cellular coverage. The operator's emergency action plan lists a chamber 2.5 hours away, a local clinic 35 minutes away, and 'call 911' as the first step. On the day of your visit, a diver surfaces after a planned 35 m/115 ft dive with omitted decompression, complains of numbness in the left arm, and is given 100% oxygen from the only demand valve kit on site. The second kit is out for hydrostatic testing. The boat captain wants to drive the diver to the clinic; the divemaster wants to wait for a coast guard vessel. The site's radio is in the dive shop, 600 m away. You must evaluate the EAP and the response.
1. Evaluate the emergency action plan against the site's actual constraints and identify the critical gaps.
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The EAP is not operationally credible for this site. 'Call 911' is the first step, but there is no cellular coverage, and the only radio is 600 m away-so the primary summoning method fails at the point of need. The plan does not assign roles (who stays with the diver, who communicates, who drives), does not define a decision rule for clinic versus chamber, and does not address transport assets or rendezvous points. The single oxygen kit is a critical single point of failure; the second kit is unavailable, and suspected neurological decompression sickness requires continuous 100% oxygen and urgent evacuation to a chamber, not a delay for a vessel that may not be timely. The plan also lacks a site-specific evacuation map, radio check procedure, after-hours contacts, and training/drill records. These are major EAP deficiencies because they would predictably delay definitive care.
2. What immediate actions should be taken for the injured diver, and who should coordinate them?
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Keep the diver supine, on 100% oxygen via demand valve, and monitor airway, breathing, circulation, and neurological status. Do not let the diver walk or drive. The divemaster should stay with the patient and record times, oxygen start, symptoms, dive profile, and gas exposure. A second person should go to the radio and establish communication with emergency services and the chamber, while a third prepares the fastest reliable transport. The boat captain's instinct to drive to the clinic is understandable but should not delay chamber consultation; the clinic may not have hyperbaric capability. If the coast guard vessel is not imminent, use road transport to the chamber or to a rendezvous point, with oxygen continued. One designated coordinator-normally the senior dive supervisor-should make the evacuation decision and communicate it clearly, rather than competing plans being followed.
3. What reporting and follow-up would you require after the incident?
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Require immediate notification through the operator's incident-reporting chain and to the relevant external authority under the program's reporting matrix. Preserve the dive computer/profile, gas analysis, equipment, oxygen kit records, radio log, witness statements, and the EAP version in force. The internal investigation should separate immediate causes (omitted decompression, recognition delay, communication gap) from systemic causes (no coverage, single oxygen kit, no role assignment, no drill). The corrective action should include a satellite phone or radio at the dive site, two serviceable oxygen kits, a written evacuation decision tree with clinic and chamber contacts, a transport plan, and quarterly drills with documented critique. Follow up with the injured diver's outcome through appropriate confidentiality channels and verify that the revised EAP is actually tested, not just filed.