make shure that all changes were reflected in the .md file

01_classes.md

@@ -167,3 +167,41 @@ struct target_data_to_thread_1_structure {
   uint32_t mmsi; // AIS unique identifier; ICAO hex address for aircraft
 };
 
+===============================================================================
+
+CURRENT IMPLEMENTATION STATUS (stub phase)
+
+Files: include/01_classes.h, src/01_classes.cpp
+
+What is built:
+
+  RadarBase — abstract base class with three pure virtual methods:
+    render_left_panel()   — renders radar description and keyboard control list
+    render_scope()        — renders scope content (stub: radar name + "stub" label)
+    render_status_bar()   — renders current control uniform values
+
+  Four stub subclasses, each overriding all three methods:
+    ChainHomeRadar      (Ventnor, Isle of Wight)
+    MarineAScopeRadar   (Community Boating Center, Bellingham Bay)
+    MarineTrafficRadar  (center of Bellingham Bay)
+    PoliceboatRadar     (Taylor Dock / Boulevard Park, Bellingham Bay)
+
+  One global instance of each subclass is declared in 01_classes.h and defined
+  in 01_classes.cpp: g_chain_home, g_marine_ascope, g_marine_traffic, g_police_boat.
+
+What is NOT yet built (future components):
+  - Real scope rendering (radar sweep, target blips, graticule, range rings/ticks,
+    north indicator, P7 persistence layer, land/terrain background)
+  - Target data ingestion from Traffic Cop
+  - The Keyboard controls class (keyboard handling currently lives in the
+    static key_callback() function in src/main.cpp)
+  - The Traffic Cop class (Thread 2) — not yet started
+  - The Simulator class (Thread 3) — not yet started
+  - Per-frame update() method — the 30 Hz render loop in main.cpp calls
+    render_left_panel(), render_scope(), and render_status_bar() directly
+
+Both target data structures (target_data_structure and
+target_data_to_thread_1_structure) are defined in
+include/data_structure_and_constants.h and will be used when the
+Traffic Cop and Simulator components are built.
+