// Operational Analysis describes the need without choosing a technical solution.
oa_actor vessel "Vessel in distress" id "00000000-0000-4000-8000-000000000101" {
    description "The vessel's crew needs to communicate its position and obtain assistance.";
}
oa_entity rescue_team "Rescue coordination" id "00000000-0000-4000-8000-000000000102" {
    description "The coordination team assesses the report and decides on a response.";
}

// This is work decomposition. It does not assign either activity to a participant.
oa_activity respond "Respond to distress" id "00000000-0000-4000-8000-000000000103" {
    // Keep the crew's reporting responsibility visible when decomposing the need.
    oa_activity report_distress "Report distress" id "00000000-0000-4000-8000-000000000104" {
        description "Provide the vessel's situation and last known position.";
    }
    oa_activity assess_incident "Assess incident" id "00000000-0000-4000-8000-000000000105" {
        description "Decide which assistance is needed using the received report.";
    }
}

oa_capability protect_life "Protect life at sea" id "00000000-0000-4000-8000-000000000106" {}
oa_exchange_item oa_report_data "Distress report" id "00000000-0000-4000-8000-000000000107" {
    kind Information;
    oa_data_field reported_latitude "Reported latitude" id "00000000-0000-4000-8000-000000000108" {
        type_ref Real;
        unit "degrees north";
    }
}

// Allocation remains explicit even though the saved architecture view nests work.
allocation crew_reports "Crew reports distress" id "00000000-0000-4000-8000-000000000201" {
    source @vessel; target @report_distress;
}
allocation team_assesses "Team assesses incident" id "00000000-0000-4000-8000-000000000202" {
    source @rescue_team; target @assess_incident;
}
interaction distress_signal "Distress signal" id "00000000-0000-4000-8000-000000000203" {
    source @report_distress; target @assess_incident; items [@oa_report_data];
}
capability_involvement operational_contribution "Assessment supports rescue" id "00000000-0000-4000-8000-000000000204" {
    source @assess_incident; target @protect_life;
}