diff --git a/SerialPrograms/CMakeLists.txt b/SerialPrograms/CMakeLists.txt
index da51665b98..7581f0e101 100644
--- a/SerialPrograms/CMakeLists.txt
+++ b/SerialPrograms/CMakeLists.txt
@@ -1330,6 +1330,8 @@ file(GLOB MAIN_SOURCES
     Source/PokemonSV/Inference/Overworld/PokemonSV_LetsGoKillDetector.h
     Source/PokemonSV/Inference/Overworld/PokemonSV_OverworldDetector.cpp
     Source/PokemonSV/Inference/Overworld/PokemonSV_OverworldDetector.h
+    Source/PokemonSV/Inference/Overworld/PokemonSV_StationaryOverworldWatcher.cpp
+    Source/PokemonSV/Inference/Overworld/PokemonSV_StationaryOverworldWatcher.h    
     Source/PokemonSV/Inference/Picnics/PokemonSV_PicnicDetector.cpp
     Source/PokemonSV/Inference/Picnics/PokemonSV_PicnicDetector.h
     Source/PokemonSV/Inference/Picnics/PokemonSV_SandwichHandDetector.cpp
diff --git a/SerialPrograms/SerialPrograms.pro b/SerialPrograms/SerialPrograms.pro
index 8f4cdea9a4..63d4c19371 100644
--- a/SerialPrograms/SerialPrograms.pro
+++ b/SerialPrograms/SerialPrograms.pro
@@ -665,6 +665,7 @@ SOURCES += \
     Source/PokemonSV/Inference/Overworld/PokemonSV_LetsGoHpReader.cpp \
     Source/PokemonSV/Inference/Overworld/PokemonSV_LetsGoKillDetector.cpp \
     Source/PokemonSV/Inference/Overworld/PokemonSV_OverworldDetector.cpp \
+    Source/PokemonSV/Inference/Overworld/PokemonSV_StationaryOverworldWatcher.cpp \
     Source/PokemonSV/Inference/Picnics/PokemonSV_PicnicDetector.cpp \
     Source/PokemonSV/Inference/Picnics/PokemonSV_SandwichHandDetector.cpp \
     Source/PokemonSV/Inference/Picnics/PokemonSV_SandwichIngredientDetector.cpp \
@@ -1759,6 +1760,7 @@ HEADERS += \
     Source/PokemonSV/Inference/Overworld/PokemonSV_LetsGoHpReader.h \
     Source/PokemonSV/Inference/Overworld/PokemonSV_LetsGoKillDetector.h \
     Source/PokemonSV/Inference/Overworld/PokemonSV_OverworldDetector.h \
+    Source/PokemonSV/Inference/Overworld/PokemonSV_StationaryOverworldWatcher.h \
     Source/PokemonSV/Inference/Picnics/PokemonSV_PicnicDetector.h \
     Source/PokemonSV/Inference/Picnics/PokemonSV_SandwichHandDetector.h \
     Source/PokemonSV/Inference/Picnics/PokemonSV_SandwichIngredientDetector.h \
diff --git a/SerialPrograms/Source/PokemonSV/Inference/Overworld/PokemonSV_StationaryOverworldWatcher.cpp b/SerialPrograms/Source/PokemonSV/Inference/Overworld/PokemonSV_StationaryOverworldWatcher.cpp
new file mode 100644
index 0000000000..2fb9499603
--- /dev/null
+++ b/SerialPrograms/Source/PokemonSV/Inference/Overworld/PokemonSV_StationaryOverworldWatcher.cpp
@@ -0,0 +1,77 @@
+/*  Stationary Overworld Detector
+ *
+ *  From: https://github.com/PokemonAutomation/Arduino-Source
+ *
+ */
+
+#include "Kernels/Waterfill/Kernels_Waterfill_Session.h"
+#include "CommonFramework/Globals.h"
+#include "CommonFramework/VideoPipeline/VideoOverlayScopes.h"
+#include "CommonFramework/ImageMatch/ImageDiff.h"
+#include "CommonFramework/ImageMatch/ExactImageMatcher.h"
+#include "CommonFramework/ImageTools/BinaryImage_FilterRgb32.h"
+#include "CommonFramework/ImageTools/WaterfillUtilities.h"
+#include "CommonFramework/ImageMatch/WaterfillTemplateMatcher.h"
+#include "PokemonSV_StationaryOverworldWatcher.h"
+
+//#include <iostream>
+//using std::cout;
+//using std::endl;
+
+namespace PokemonAutomation{
+namespace NintendoSwitch{
+namespace PokemonSV{
+
+
+
+
+
+StationaryOverworldWatcher::StationaryOverworldWatcher(Color color, ImageFloatBox box, size_t seconds_stationary)
+     : VisualInferenceCallback("StationaryOverworldWatcher")
+     , m_color(color)
+     , m_box(box)
+     , m_overworld_detector(color)
+     , m_map_hold_duration(std::chrono::milliseconds(seconds_stationary * 1000))
+{}
+
+void StationaryOverworldWatcher::make_overlays(VideoOverlaySet& items) const{
+    items.add(m_color, m_box);
+}
+
+bool StationaryOverworldWatcher::process_frame(const VideoSnapshot& frame){
+    if (!m_overworld_detector.detect(frame)){
+        m_snapshot_start.clear();
+        return false;
+    }
+
+    if (!m_snapshot_start){
+        m_snapshot_start = frame;
+        return false;
+    }
+
+    // Check if radar map stays still for `m_map_hold_duration`
+
+    //  Mismatching image sizes.
+    ImageViewRGB32 start = extract_box_reference(m_snapshot_start, m_box);
+    ImageViewRGB32 current = extract_box_reference(frame, m_box);
+    if (start.width() != current.width() || start.height() != current.height()){
+        m_snapshot_start = frame;
+        return false;
+    }
+    
+    double rmsd = ImageMatch::pixel_RMSD(start, current);
+//    cout << "rmsd = " << rmsd << endl;
+    if (rmsd > 2.0){ //  Image of radar map has changed too much.
+        m_snapshot_start = frame;
+        return false;
+    }
+
+    //  Make sure radar map held for long enough.
+    return frame.timestamp - m_snapshot_start.timestamp >= m_map_hold_duration;    
+}
+
+
+
+}
+}
+}
\ No newline at end of file
diff --git a/SerialPrograms/Source/PokemonSV/Inference/Overworld/PokemonSV_StationaryOverworldWatcher.h b/SerialPrograms/Source/PokemonSV/Inference/Overworld/PokemonSV_StationaryOverworldWatcher.h
new file mode 100644
index 0000000000..affb0938d3
--- /dev/null
+++ b/SerialPrograms/Source/PokemonSV/Inference/Overworld/PokemonSV_StationaryOverworldWatcher.h
@@ -0,0 +1,46 @@
+/*  Stationary Overworld Detector
+ *
+ *  From: https://github.com/PokemonAutomation/Arduino-Source
+ *
+ */
+
+#ifndef PokemonAutomation_PokemonSV_StationaryOverworldWatcher_H
+#define PokemonAutomation_PokemonSV_StationaryOverworldWatcher_H
+
+#include "Common/Cpp/Color.h"
+#include "CommonFramework/ImageTools/ImageBoxes.h"
+#include "CommonFramework/VideoPipeline/VideoFeed.h"
+#include "CommonFramework/InferenceInfra/VisualInferenceCallback.h"
+#include "CommonFramework/Inference/VisualDetector.h"
+#include "PokemonSV/Inference/Overworld/PokemonSV_OverworldDetector.h"
+
+
+namespace PokemonAutomation{
+namespace NintendoSwitch{
+namespace PokemonSV{
+
+
+
+class StationaryOverworldWatcher : public VisualInferenceCallback{
+public:
+    StationaryOverworldWatcher(Color color = COLOR_RED, ImageFloatBox box = {0.865, 0.82, 0.08, 0.1}, size_t seconds_stationary = 5);
+
+    virtual void make_overlays(VideoOverlaySet& items) const override;
+    // return true if the screen within `m_box` doesn't change for am amount of time as per `seconds_stationary`
+    // the overworld must be detected throughout this.
+    virtual bool process_frame(const VideoSnapshot& frame) override;
+
+
+private:
+    const Color m_color;
+    const ImageFloatBox m_box;
+    const OverworldDetector m_overworld_detector;
+    const std::chrono::milliseconds m_map_hold_duration;
+    VideoSnapshot m_snapshot_start;
+};
+
+
+}
+}
+}
+#endif