diff --git a/src/GUI/LocalAircraftCache.cxx b/src/GUI/LocalAircraftCache.cxx
index eaf1eb72a..306b4195e 100644
--- a/src/GUI/LocalAircraftCache.cxx
+++ b/src/GUI/LocalAircraftCache.cxx
@@ -399,6 +399,7 @@ Q_SIGNALS:
 protected:
     void run() override
     {
+        flightgear::addSentryBreadcrumb("AircraftScan started", "info");
         readCache();
 
         // avoid filling up Sentry with many reports
@@ -416,6 +417,7 @@ protected:
         }
 
         writeCache();
+        flightgear::addSentryBreadcrumb("AircraftScan finished", "info");
     }
 
 private:
diff --git a/src/GUI/QtLauncher.cxx b/src/GUI/QtLauncher.cxx
index b531fc8dd..1d6207b66 100644
--- a/src/GUI/QtLauncher.cxx
+++ b/src/GUI/QtLauncher.cxx
@@ -174,6 +174,7 @@ void initNavCache()
         updateTimer.start(); // timer won't actually run until we process events
         rebuildProgress.exec();
         updateTimer.stop();
+        flightgear::addSentryBreadcrumb("Launcher nav-cache rebuild complete", "info");
     }
 }