diff --git a/src/main/java/com/atsuishio/superbwarfare/client/overlay/SpyglassRangeOverlay.java b/src/main/java/com/atsuishio/superbwarfare/client/overlay/SpyglassRangeOverlay.java
index 02e871a48..2a9d0ee7d 100644
--- a/src/main/java/com/atsuishio/superbwarfare/client/overlay/SpyglassRangeOverlay.java
+++ b/src/main/java/com/atsuishio/superbwarfare/client/overlay/SpyglassRangeOverlay.java
@@ -59,9 +59,9 @@ public class SpyglassRangeOverlay implements LayeredDraw.Layer {
         var screenWidth = guiGraphics.guiWidth();
         var screenHeight = guiGraphics.guiHeight();
 
-        if (((player.isUsingItem() && player.getUseItem().is(ModItems.ARTILLERY_INDICATOR.get())) || player.isScoping()) && Minecraft.getInstance().options.getCameraType() == CameraType.FIRST_PERSON) {
-            if (player.getUseItem().is(ModItems.ARTILLERY_INDICATOR.get())) {
-                ItemStack stack = player.getUseItem();
+        if ((player.getMainHandItem().is(ModItems.ARTILLERY_INDICATOR.get()) || player.isScoping()) && Minecraft.getInstance().options.getCameraType() == CameraType.FIRST_PERSON) {
+            if (player.getMainHandItem().is(ModItems.ARTILLERY_INDICATOR.get())) {
+                ItemStack stack = player.getMainHandItem();
                 poseStack.pushPose();
                 RenderSystem.disableDepthTest();
                 RenderSystem.depthMask(false);
@@ -79,14 +79,16 @@ public class SpyglassRangeOverlay implements LayeredDraw.Layer {
                 float k = ((screenWidth - i) / 2);
                 float l = ((screenHeight - j) / 2);
                 float w = i * 21 / 9;
-                preciseBlit(guiGraphics, Mod.loc("textures/screens/spyglass.png"), k - (2 * w / 7), l, 0, 0.0F, w, j, w, j);
+                if (player.isUsingItem()) {
+                    preciseBlit(guiGraphics, Mod.loc("textures/screens/spyglass.png"), k - (2 * w / 7), l, 0, 0.0F, w, j, w, j);
+                }
 
                 // 标记位置
                 Vec3 pos;
                 var parameters = stack.get(ModDataComponents.FIRING_PARAMETERS);
                 if (parameters != null) {
                     var blockPos = parameters.pos();
-                    pos = new Vec3(blockPos.getX(), blockPos.getY(), blockPos.getZ());
+                    pos = new Vec3(blockPos.getX() - 0.5, blockPos.getY() + 0.5, blockPos.getZ() + 0.5);
                 } else {
                     pos = Vec3.ZERO;
                 }
@@ -115,12 +117,16 @@ public class SpyglassRangeOverlay implements LayeredDraw.Layer {
                     }
                 }
 
-                RenderHelper.fill(guiGraphics, RenderType.guiOverlay(), (float) screenWidth / 2 - 20, (float) (screenHeight / 2 + 44), (float) screenWidth / 2 + 20, (float) screenHeight / 2 + 48, -90, -16777216);
-                RenderHelper.fill(guiGraphics, RenderType.guiOverlay(), (float) screenWidth / 2 - 20, (float) (screenHeight / 2 + 44), (float) (screenWidth / 2 - 20 + 4 * ClientEventHandler.holdArtilleryIndicator), (float) screenHeight / 2 + 48, -90, -1);
+                if (ClientEventHandler.holdArtilleryIndicator > 0) {
+                    RenderHelper.fill(guiGraphics, RenderType.guiOverlay(), (float) screenWidth / 2 - 20, (float) (screenHeight / 2 + 44), (float) screenWidth / 2 + 20, (float) screenHeight / 2 + 48, -90, -16777216);
+                    RenderHelper.fill(guiGraphics, RenderType.guiOverlay(), (float) screenWidth / 2 - 20, (float) (screenHeight / 2 + 44), (float) (screenWidth / 2 - 20 + 4 * ClientEventHandler.holdArtilleryIndicator), (float) screenHeight / 2 + 48, -90, -1);
+                }
 
                 poseStack.popPose();
             }
 
+            // vehicle info display
+
             boolean lookAtEntity = false;
 
             BlockHitResult result = player.level().clip(new ClipContext(player.getEyePosition(), player.getEyePosition().add(player.getViewVector(1).scale(512)),
diff --git a/src/main/java/com/atsuishio/superbwarfare/event/ClientEventHandler.java b/src/main/java/com/atsuishio/superbwarfare/event/ClientEventHandler.java
index f50669cdf..16d223cfc 100644
--- a/src/main/java/com/atsuishio/superbwarfare/event/ClientEventHandler.java
+++ b/src/main/java/com/atsuishio/superbwarfare/event/ClientEventHandler.java
@@ -296,7 +296,7 @@ public class ClientEventHandler {
                 PacketDistributor.sendToServer(ArtilleryIndicatorFireMessage.INSTANCE);
             }
         } else {
-            holdArtilleryIndicator = Mth.clamp(holdArtilleryIndicator - 1, 0, 10);
+            holdArtilleryIndicator = 0;
         }
 
         isProne(player);