diff --git a/app/src/main/java/com/example/medilightv2android/ui/views/monitoring/PlacementGuideView.kt b/app/src/main/java/com/example/medilightv2android/ui/views/monitoring/PlacementGuideView.kt
index 01a5b26..d5a2bad 100644
--- a/app/src/main/java/com/example/medilightv2android/ui/views/monitoring/PlacementGuideView.kt
+++ b/app/src/main/java/com/example/medilightv2android/ui/views/monitoring/PlacementGuideView.kt
@@ -307,9 +307,11 @@ fun PlacementGuideView(appState: AppState) {
 
             // 화살표 깜빡임 — alpha 1.0 ↔ 0.0 (완전 사라짐), 빨강 색.
             // 사용자 피드백: "붉은색/사라짐 으로 깜빡임"
+            // tween 0ms (snap) — 아래 Hint 2 의 ". .. ..." 도트 변화(instant)와 동일
+            // 시각 tick 에 깜빡이도록 fade 제거 → 둘이 같은 박자로 보임.
             val arrowAlpha by animateFloatAsState(
                 targetValue = if (scanCount % 2 == 0) 1f else 0f,
-                animationSpec = tween(durationMillis = 220),
+                animationSpec = tween(durationMillis = 0),
                 label = "arrowBlink"
             )