diff --git a/examples/companion_radio/ui-core/NearbyModel.h b/examples/companion_radio/ui-core/NearbyModel.h
index 732d752c..8c9ceab1 100644
--- a/examples/companion_radio/ui-core/NearbyModel.h
+++ b/examples/companion_radio/ui-core/NearbyModel.h
@@ -43,6 +43,7 @@ public:
     // channel (name, best-effort) one.
     bool     is_live;
     bool     live_verified;
+    bool     is_sos;         // the live position came with an SOS (LiveTrackStore::Entry::sos)
     // Favourite (ContactInfo::flags bit 0) -- only a contact carries it.
     bool     fav;
   };
@@ -130,6 +131,7 @@ public:
       e.is_known    = true;
       e.is_live     = false;
       e.live_verified = false;
+      e.is_sos      = false;
     }
 
     mergeLiveTrack();
@@ -161,6 +163,7 @@ public:
       e.contact_idx = -1;
       e.is_live = false;
       e.live_verified = false;
+      e.is_sos = false;
     }
     // strongest first
     for (int i = 0; i < _count - 1; i++) {
@@ -230,6 +233,7 @@ protected:
         if (s.ts > e.lastmod) e.lastmod = s.ts;
         e.is_live       = true;
         e.live_verified = s.verified;
+        e.is_sos        = s.sos;
       } else if (_count < MAX_NEARBY && typeMatchesFilter(ADV_TYPE_CHAT, 0, false)) {
         // A sender we don't have as a contact: treat it as a companion (the only
         // node type that shares position), so the type filter still applies.
@@ -253,6 +257,7 @@ protected:
         e.is_known      = false;
         e.is_live       = true;
         e.live_verified = s.verified;
+        e.is_sos        = s.sos;
       }
     }
   }
@@ -287,6 +292,7 @@ protected:
       e.contact_idx = -1;
       e.is_known    = false;
       e.is_live     = false;
+      e.is_sos      = false;
     }
   }
 
diff --git a/examples/companion_radio/ui-lvgl/HomeScreen.h b/examples/companion_radio/ui-lvgl/HomeScreen.h
index 203301ce..b70f9c39 100644
--- a/examples/companion_radio/ui-lvgl/HomeScreen.h
+++ b/examples/companion_radio/ui-lvgl/HomeScreen.h
@@ -142,7 +142,7 @@ static lv_obj_t* s_imgs[COLS * ROWS];
 static lv_obj_t* s_hint = nullptr;
 static lv_obj_t* s_caption = nullptr;
 static const int MAX_PTS = LiveTrackStore::CAPACITY + 2;
-enum : uint8_t { P_ME, P_LAST, P_TARGET, P_LIVE };   // how a point's dot looks
+enum : uint8_t { P_ME, P_LAST, P_TARGET, P_LIVE, P_SOS };   // how a point's dot looks
 struct Pt { int32_t lat, lon; uint8_t kind; lv_obj_t* obj; };
 static PSRAM_BSS Pt s_pts[MAX_PTS];   // [0] you, then the target, then live shares
 static int s_npts = 0;
@@ -160,6 +160,7 @@ static lv_obj_t* dot(uint8_t kind) {
   const struct { uint8_t d; uint32_t col, border; } LOOK[] = {
     { 14, theme::ACCENT, theme::BG }, { 14, theme::BG, theme::ACCENT },   // you; no fix: the last position, hollow
     { 12, theme::BG, theme::ACCENT }, { 12, theme::OK, theme::BG },       // the target; live shares
+    { 12, theme::FAIL, theme::BG },                                       // someone's SOS, pulsing
   };
   int d = LOOK[kind].d;
   uint32_t col = LOOK[kind].col, border = LOOK[kind].border;
@@ -172,6 +173,7 @@ static lv_obj_t* dot(uint8_t kind) {
   lv_obj_set_style_border_color(o, lv_color_hex(border), 0);
   lv_obj_set_style_border_width(o, 2, 0);
   lv_obj_remove_flag(o, LV_OBJ_FLAG_CLICKABLE);
+  if (kind == P_SOS) mapview::sosPulse(o);
   return o;
 }
 }  // namespace mini
@@ -708,7 +710,7 @@ bool UITask::homeMapFit() {
   for (int i = 0; i < LiveTrackStore::CAPACITY && np < MAX_PTS; i++) {
     if (!lt.isActive(i, now)) continue;
     const LiveTrackStore::Entry& e = lt.slotAt(i);
-    pts[np++] = { e.lat_1e6, e.lon_1e6, P_LIVE, nullptr };
+    pts[np++] = { e.lat_1e6, e.lon_1e6, e.sos ? P_SOS : P_LIVE, nullptr };
     live++;
   }
   bool same = np == s_npts;
diff --git a/examples/companion_radio/ui-lvgl/MapScreen.h b/examples/companion_radio/ui-lvgl/MapScreen.h
index 94f74937..76825d05 100644
--- a/examples/companion_radio/ui-lvgl/MapScreen.h
+++ b/examples/companion_radio/ui-lvgl/MapScreen.h
@@ -189,6 +189,7 @@ struct Mark {
   int16_t lx, ly, lw, lh;     // name pill, layer px (lw 0: no room for it)
   uint8_t order;              // 1.. while it is a hop of the route being picked, else 0
   bool vis;                   // inside the view
+  bool sos;                   // someone's SOS: a pulsing ring around the dot (s_sos_rings)
 };
 // What was drawn for a slot last time, to repaint only what changed.
 struct MarkSig { int16_t x, y, lx, ly, lw; uint32_t col, hash; uint8_t order; bool vis; };
@@ -198,6 +199,10 @@ static Mark* s_marks = psramBuf<Mark>(MAX_MARKS);
 static MarkSig* s_sigs = psramBuf<MarkSig>(MAX_MARKS);
 static int  s_sig_n = 0;
 static lv_obj_t* s_mark_layer = nullptr;
+// Rings pulsing out of the SOS markers in view: objects over the drawn layer,
+// so only their small area is repainted each frame, not the layer.
+static const int SOS_RINGS = 4;
+static lv_obj_t* s_sos_rings[SOS_RINGS];
 // The route being picked (Route > Map): its points as lat/lon, and in layer px
 // from the last layout, drawn as a line under the markers.
 static const int ROUTE_PTS = HopRoute::MAX_PTS;   // a picked route has 10 at most
@@ -505,6 +510,27 @@ static void drawFlows(lv_layer_t* layer, const lv_area_t& a) {
 }
 
 static const int MARK_D = 12;   // marker dot diameter
+
+// An SOS marker's ring: an outline round `o` (the dot's size) that grows out
+// of it and fades, over and over. Home's mini map uses it too.
+static void setSosPulse(void* o, int32_t v) {
+  lv_obj_set_style_outline_pad((lv_obj_t*)o, (int32_t)(v * 14 / 1000), 0);
+  lv_obj_set_style_outline_opa((lv_obj_t*)o, (lv_opa_t)(LV_OPA_COVER - v * LV_OPA_COVER / 1000), 0);
+}
+static void sosPulse(lv_obj_t* o) {
+  lv_obj_set_style_outline_color(o, lv_color_hex(theme::FAIL), 0);
+  lv_obj_set_style_outline_width(o, 2, 0);
+  lv_anim_t a;
+  lv_anim_init(&a);
+  lv_anim_set_var(&a, o);
+  lv_anim_set_exec_cb(&a, setSosPulse);
+  lv_anim_set_values(&a, 0, 1000);
+  lv_anim_set_duration(&a, 1200);
+  lv_anim_set_repeat_delay(&a, 300);
+  lv_anim_set_repeat_count(&a, LV_ANIM_REPEAT_INFINITE);
+  lv_anim_set_path_cb(&a, lv_anim_path_ease_out);
+  lv_anim_start(&a);
+}
 static const int MARK_LABELS_MAX = 20;   // names shown at once: the rest stay dots
 
 // LV_EVENT_DRAW_MAIN of the marker layer: the name pills, then the dots over them.
@@ -830,6 +856,15 @@ void UITask::buildMap() {
   lv_obj_remove_flag(mapview::s_mark_layer, LV_OBJ_FLAG_CLICKABLE);
   lv_obj_remove_flag(mapview::s_mark_layer, LV_OBJ_FLAG_SCROLLABLE);
   lv_obj_add_event_cb(mapview::s_mark_layer, mapview::drawMarks, LV_EVENT_DRAW_MAIN, NULL);
+  for (lv_obj_t*& r : mapview::s_sos_rings) {
+    r = lv_obj_create(mapview::s_mark_layer);
+    lv_obj_remove_style_all(r);
+    lv_obj_set_size(r, mapview::MARK_D + 1, mapview::MARK_D + 1);
+    lv_obj_set_style_radius(r, LV_RADIUS_CIRCLE, 0);
+    lv_obj_remove_flag(r, LV_OBJ_FLAG_CLICKABLE);
+    lv_obj_add_flag(r, LV_OBJ_FLAG_HIDDEN);
+    mapview::sosPulse(r);
+  }
   mapview::s_flow = &_core->flow;
   mapview::s_view_ok = false;
   mapview::s_flow_area_on = false;
@@ -1120,15 +1155,15 @@ void UITask::rebuildNodeMarkers() {
     const NearbyModel::Entry& e = _nearby->at(i);
     if (e.lat_e6 == 0 && e.lon_e6 == 0) continue;
     if (e.is_live && _map_nav) continue;   // the live share's own marker shows it
-    uint32_t col = e.is_live ? theme::OK : e.type == ADV_TYPE_CHAT ? theme::TEXT : theme::TEXT_MUTED;
-    addMapMark(mapview::MK_NODE, i, e.lat_e6, e.lon_e6, col, e.name[0] ? e.name : "?");
+    uint32_t col = e.is_sos ? theme::FAIL : e.is_live ? theme::OK : e.type == ADV_TYPE_CHAT ? theme::TEXT : theme::TEXT_MUTED;
+    addMapMark(mapview::MK_NODE, i, e.lat_e6, e.lon_e6, col, e.name[0] ? e.name : "?", e.is_sos);
   }
 }
 
 // A marker is a record: where it is, its colour and name. Placement and
 // painting are layoutMapMarks() and mapview::drawMarks(). The name's width is
 // measured here, not per pan: a slot whose name is unchanged keeps it.
-void UITask::addMapMark(uint8_t kind, int idx, int32_t lat_e6, int32_t lon_e6, uint32_t col, const char* text) {
+void UITask::addMapMark(uint8_t kind, int idx, int32_t lat_e6, int32_t lon_e6, uint32_t col, const char* text, bool sos) {
   if (!_map_marks || mapview::s_mark_count >= mapview::MAX_MARKS) return;
   uint32_t h = 2166136261u;   // FNV-1a of the name
   for (const char* c = text; *c; c++) h = (h ^ (uint8_t)*c) * 16777619u;
@@ -1136,7 +1171,7 @@ void UITask::addMapMark(uint8_t kind, int idx, int32_t lat_e6, int32_t lon_e6, u
   mapview::Mark& mk = mapview::s_marks[k];
   bool same_name = k < mapview::s_mark_prev && mk.text_hash == h;
   mk.lat_e6 = lat_e6; mk.lon_e6 = lon_e6; mk.idx = idx; mk.kind = kind; mk.col = col; mk.text_hash = h;
-  mk.vis = false; mk.lw = 0; mk.order = 0;
+  mk.vis = false; mk.lw = 0; mk.order = 0; mk.sos = sos;
   if (same_name) return;
   size_t n = strlen(text);
   if (n > (size_t)mapview::MARK_NAME) {   // cut at a character boundary
@@ -1268,6 +1303,14 @@ void UITask::layoutMapMarks(double left, double top, int w, int h) {
     const Mark& m = s_marks[k];
     s_sigs[k] = { m.x, m.y, m.lx, m.ly, m.lw, m.col, m.text_hash, m.order, m.vis };
   }
+  int rings = 0;
+  for (int k = 0; k < s_mark_count && rings < SOS_RINGS; k++) {
+    const Mark& m = s_marks[k];
+    if (!m.vis || !m.sos || !s_sos_rings[rings]) continue;
+    lv_obj_set_pos(s_sos_rings[rings], m.x - half, m.y - half);
+    lv_obj_remove_flag(s_sos_rings[rings++], LV_OBJ_FLAG_HIDDEN);
+  }
+  for (; rings < SOS_RINGS; rings++) if (s_sos_rings[rings]) lv_obj_add_flag(s_sos_rings[rings], LV_OBJ_FLAG_HIDDEN);
   s_sig_n = s_mark_count;
 }
 
diff --git a/examples/companion_radio/ui-lvgl/NavMap.h b/examples/companion_radio/ui-lvgl/NavMap.h
index f2b852fb..fa41d82a 100644
--- a/examples/companion_radio/ui-lvgl/NavMap.h
+++ b/examples/companion_radio/ui-lvgl/NavMap.h
@@ -306,7 +306,7 @@ void UITask::rebuildNavMarkers() {
     char age[8], t[LiveTrackStore::NAME_LEN + 12];
     geo::fmtAgeShort(age, sizeof(age), now, e.ts);
     snprintf(t, sizeof(t), "%s%s%s", e.name, age[0] ? "  " : "", age);
-    addMapMark(mapview::MK_LIVE, i, e.lat_1e6, e.lon_1e6, theme::OK, t);
+    addMapMark(mapview::MK_LIVE, i, e.lat_1e6, e.lon_1e6, e.sos ? theme::FAIL : theme::OK, t, e.sos);
   }
 
   navTrailSync();
@@ -1550,10 +1550,10 @@ void UITask::navTargetsPopup() {
     const LiveTrackStore::Entry& e = lt.slotAt(i);
     char age[8], sub[40], d[12];
     geo::fmtAgeShort(age, sizeof(age), now, e.ts);
-    snprintf(sub, sizeof(sub), "%s  -  %s ago", e.verified ? "direct" : "channel", age[0] ? age : "0s");
+    snprintf(sub, sizeof(sub), "%s%s  -  %s ago", e.sos ? "SOS, " : "", e.verified ? "direct" : "channel", age[0] ? age : "0s");
     lv_obj_t* row = listRow(list, e.name, sub, onNavPick, (void*)(uintptr_t)navmap::code(navmap::T_LIVE, i));
     dist(e.lat_1e6, e.lon_1e6, d, sizeof(d));
-    if (d[0]) navRowRight(row, d, theme::OK, theme::PAD);
+    if (d[0]) navRowRight(row, d, e.sos ? theme::FAIL : theme::OK, theme::PAD);
     live++;
   }
   if (live == 0) label(list, "Nobody is sharing their position.", THEME_FONT_SMALL, theme::TEXT_MUTED);
diff --git a/examples/companion_radio/ui-lvgl/NodesView.h b/examples/companion_radio/ui-lvgl/NodesView.h
index 02d95dc2..8a407772 100644
--- a/examples/companion_radio/ui-lvgl/NodesView.h
+++ b/examples/companion_radio/ui-lvgl/NodesView.h
@@ -182,7 +182,7 @@ uint32_t UITask::nearbySignature() const {
   for (int i = 0; i < _nearby->count(); i++) {
     const NearbyModel::Entry& e = _nearby->at(i);
     sig = sig * 31 + e.contact_idx + (uint32_t)e.lastmod + (uint32_t)(e.dist_km * 100) + e.rssi + e.fav
-        + e.type * 5 + (e.is_live ? 3 : 0);
+        + e.type * 5 + (e.is_live ? 3 : 0) + (e.is_sos ? 17 : 0);
     for (const char* p = e.name; *p; p++) sig = sig * 31 + (uint8_t)*p;
   }
   // Ages are shown in minutes, so let the list re-render once a minute anyway.
@@ -201,9 +201,9 @@ static void nearbyText(const NearbyModel::Entry& e, uint32_t now, bool imperial,
   if (e.dist_km >= 0.0f) geo::fmtDist(t.right, sizeof(t.right), e.dist_km, imperial);
   else if (age[0]) snprintf(t.right, sizeof(t.right), "%s", age);
   const char* kind = e.contact_idx >= 0 ? NearbyModel::typeName(e.type) : "not a contact";
-  snprintf(t.sub, sizeof(t.sub), "%s%s%s%s", kind, e.is_live ? "  -  live" : "",
+  snprintf(t.sub, sizeof(t.sub), "%s%s%s%s", kind, e.is_sos ? "  -  SOS" : e.is_live ? "  -  live" : "",
            (e.dist_km >= 0.0f && age[0]) ? "  -  " : "", (e.dist_km >= 0.0f && age[0]) ? age : "");
-  t.right_col = e.is_live ? theme::OK : theme::TEXT_MUTED;
+  t.right_col = e.is_sos ? theme::FAIL : e.is_live ? theme::OK : theme::TEXT_MUTED;
 }
 
 // A small arrow towards the node, drawn in the value label's left padding:
@@ -391,7 +391,8 @@ void UITask::refreshNode() {
   int o = 0;
   auto tag = [&](const char* t) { o += snprintf(status + o, sizeof(status) - o, "%s%s", o ? ", " : "", t); };
   if (!known) tag("not a contact");
-  if (e.is_live) tag(e.live_verified ? "live position" : "live position (channel)");
+  if (e.is_sos) tag(e.live_verified ? "SOS position" : "SOS position (channel)");
+  else if (e.is_live) tag(e.live_verified ? "live position" : "live position (channel)");
   if (e.fav) tag("favourite");
   if (status[0] >= 'a' && status[0] <= 'z') status[0] -= 'a' - 'A';
   int32_t lat, lon;
diff --git a/examples/companion_radio/ui-lvgl/UITask.h b/examples/companion_radio/ui-lvgl/UITask.h
index 1788b9bf..46ce7dfe 100644
--- a/examples/companion_radio/ui-lvgl/UITask.h
+++ b/examples/companion_radio/ui-lvgl/UITask.h
@@ -486,7 +486,7 @@ private:
   void mapLoop();
   void rebuildMapMarkers();
   void rebuildNodeMarkers();
-  void addMapMark(uint8_t kind, int idx, int32_t lat_e6, int32_t lon_e6, uint32_t col, const char* text);
+  void addMapMark(uint8_t kind, int idx, int32_t lat_e6, int32_t lon_e6, uint32_t col, const char* text, bool sos = false);
   void mapPointToLatLon(int x, int y, int32_t& lat_e6, int32_t& lon_e6) const;
   double mapCenterBias() const;
   int mapBottomH() const;