diff --git a/README.md b/README.md
index 69f450d..952a668 100644
--- a/README.md
+++ b/README.md
@@ -97,7 +97,8 @@ CI: `.gitea/workflows/build.yml` на каждый пуш собирает то
 перенацеливает ещё не взлетевшие Ланцеты и Шахеды на них; если цель-комплекс уничтожен, дроны идут к
 следующему известному. Дроны под обстрелом прижимаются к земле.
 
-**Ночь.** Ночью пушки попадают втрое хуже, если цель не освещена. Освещают **прожекторы** (луч ведёт ближайшую
+**Ночь.** Исправные пушки с собственным свежим радарным сопровождением не теряют точность из-за темноты.
+Цели освещают **прожекторы** (луч ведёт ближайшую
 цель из сети, приоритет — цели пушек) и **осветительные ракеты**: пушечные комплексы пускают их сами (раз в
 25 с на цель в темноте), игрок — **осветительным пистолетом** или `/airdef flare`. Ракета висит ~30 с и
 освещает всё вокруг на ~60–90 м.
diff --git a/airdef-mod/src/sim/lights.rs b/airdef-mod/src/sim/lights.rs
index afeecbf..41921b1 100644
--- a/airdef-mod/src/sim/lights.rs
+++ b/airdef-mod/src/sim/lights.rs
@@ -1,5 +1,5 @@
-//! Night fighting: guns aim by sight, and at night they hit far less unless
-//! the target is lit. Searchlights follow the network's tracks with their
+//! Night fighting: darkness penalizes aiming without fresh radar fire control,
+//! unless the target is lit. Searchlights follow the network's tracks with their
 //! beams; illumination flares (fired by the guns on their own, or by the
 //! player) hang over the sky for half a minute and light everything round.
 use super::*;
@@ -24,6 +24,11 @@ pub const DARK_HITS: f64 = 0.4;
 /// Ticks between a gun's own flares.
 const FLARE_EVERY: u32 = 500;
 
+/// Night only reduces a gun's hit chance when it has to aim by sight.
+pub(super) fn hit_factor(night: bool, lit: bool, radar_fire_control: bool) -> f64 {
+    if night && !lit && !radar_fire_control { DARK_HITS } else { 1.0 }
+}
+
 pub struct Flare {
     id: u32,
     pub pos: DVec3,
diff --git a/airdef-mod/src/sim/mod.rs b/airdef-mod/src/sim/mod.rs
index 2959c26..caff02c 100644
--- a/airdef-mod/src/sim/mod.rs
+++ b/airdef-mod/src/sim/mod.rs
@@ -2728,8 +2728,11 @@ impl Sim {
                             let event = if sam.kind == SamKind::Pantsir { "airdef:gun.pantsir" } else { "airdef:gun.gepard" };
                             out.sound(event, mount, 1.0, 0.95 + self.vis.f() as f32 * 0.1);
                         }
-                        // At night a gun sees what is lit (a searchlight, a flare) and little else.
-                        let dark = if self.night && !self.lit.contains(&t.id) { lights::DARK_HITS } else { 1.0 };
+                        // A fresh working own-radar fire-control track does not depend on seeing the target.
+                        // Guns without that radar picture still take the darkness penalty unless illuminated.
+                        let radar_fire_control = sam.radar_up()
+                            && sam.track(gt).is_some_and(|tr| tr.own_within(now, sight::GUN_AGE));
+                        let dark = lights::hit_factor(self.night, self.lit.contains(&t.id), radar_fire_control);
                         // The aim point is the track's forecast: the farther it is from the truth, the more shells miss.
                         let off = est.distance(t.pos);
                         let p = gun.p * sam.gun_fit() * dark / (t.kind.spec().stealth * (1.0 + (off / 8.0).powi(2))) * (1.0 - dist / (gun.range * 1.3)).max(0.35);
diff --git a/airdef-mod/src/sim/sensor_tests.rs b/airdef-mod/src/sim/sensor_tests.rs
index aa56ef1..47f8496 100644
--- a/airdef-mod/src/sim/sensor_tests.rs
+++ b/airdef-mod/src/sim/sensor_tests.rs
@@ -181,6 +181,34 @@ fn a_close_blast_can_leave_a_firing_but_immobile_system() {
     assert!(found, "no seed left it firing but immobile");
 }
 
+#[test]
+fn a_fresh_own_radar_track_keeps_gun_hits_equal_day_and_night() {
+    fn firing(seed: u64, night: bool) -> (u32, u32) {
+        let mut sim = Sim::new(seed);
+        let (mut ground, mut out) = flat();
+        let gun = radar_at(&mut sim, SamKind::Gepard, 0.0);
+        sim.night = night;
+        sim.add_drone(
+            DroneKind::Shahed,
+            DVec3::new(0.0, 95.0, 35.0),
+            DVec3::ZERO,
+            DVec3::new(5000.0, 95.0, 35.0),
+        );
+        let starting_bursts = sim.sams[gun].bursts;
+        for _ in 0..240 {
+            sim.step(&mut ground, None, &mut out);
+        }
+        (starting_bursts - sim.sams[gun].bursts, sim.sams[gun].kills)
+    }
+
+    for seed in 0..32 {
+        let day = firing(seed, false);
+        let night = firing(seed, true);
+        assert!(day.0 > 0, "seed {seed} did not fire");
+        assert_eq!(night, day, "seed {seed}: radar gun changed its fire or kills at night");
+    }
+}
+
 #[test]
 fn failed_parts_block_what_they_serve_and_repair_restores_them() {
     let mut sim = Sim::new(2);