diff --git a/target_simulator/gui/sfp_debug_window.py b/target_simulator/gui/sfp_debug_window.py
index a42e293..8735b9d 100644
--- a/target_simulator/gui/sfp_debug_window.py
+++ b/target_simulator/gui/sfp_debug_window.py
@@ -731,6 +731,33 @@ class SfpDebugWindow(tk.Toplevel):
                                 except Exception:
                                     return None
 
+                            def decimal_deg_to_dms(deg, is_lat=True):
+                                """Convert decimal degrees to DMS string with direction.
+
+                                Examples:
+                                    45.50417 -> 45°30'15" N
+                                    -73.9876 -> 73°59'15" W
+                                """
+                                try:
+                                    d = float(deg)
+                                except Exception:
+                                    return str(deg)
+
+                                # direction
+                                if is_lat:
+                                    direction = "N" if d >= 0 else "S"
+                                else:
+                                    direction = "E" if d >= 0 else "W"
+
+                                ad = abs(d)
+                                degrees = int(ad)
+                                minutes_full = (ad - degrees) * 60
+                                minutes = int(minutes_full)
+                                seconds = (minutes_full - minutes) * 60
+
+                                # Format seconds with 2 decimal places to keep it compact
+                                return f"{degrees}°{minutes}'{seconds:.2f}\" {direction}"
+
                             # collect rows first so we can log the exact label->value mapping
                             scenario_rows = []
                             for label, key, unit in order:
@@ -783,8 +810,9 @@ class SfpDebugWindow(tk.Toplevel):
                                         elif key in ("latitude", "longitude"):
                                             fv = try_float(val)
                                             if fv is not None:
-                                                # show decimal degrees with higher precision per request
-                                                display_val = f"{fv:.{8}f} °"
+                                                # show as degrees/minutes/seconds with direction
+                                                is_lat = key == "latitude"
+                                                display_val = decimal_deg_to_dms(fv, is_lat=is_lat)
                                             else:
                                                 display_val = str(val)
                                         elif key == "flags":