Write a contingency before anyone pays. List weather, sea conditions, venue access, staffing, an unanswered health question, equipment availability, late arrival, anxiety, and changes in headcount. For each trigger, state who decides, who is informed, whether another activity is possible, and what the written terms say. Do not call a refund or replacement date automatic unless confirmed.
Use “pause, assess, communicate, record”. Pause the affected lane without blaming anyone. Ask the provider or qualified professional to assess the issue. Communicate only the operational information the group needs, protecting private details. Record the decision, owner and next action so the question is not reopened by several organisers.
The FWS handbook says its operations should reflect the least experienced diver. It also calls for a safety plan and pre-dive briefing. Use that as a planning principle, not as a claim about a local provider’s exact policy. Let the most cautious participant understand the route and opt out without pressure.
Finish with a handover note containing the final count, lanes, provider contact, and meeting details. Add departure details, confirmed inclusions, pending items, contingency decisions, and the post-activity owner. Send a short participant version and retain the fuller organiser version.
Success is not forcing everyone through one sequence. It is an honest purpose, understood roles, delivered briefings, decisions by the right people and a clear next step. That is the practical value of group dive programme planning.