diff --git a/airdef-mod/src/lib.rs b/airdef-mod/src/lib.rs
index 0d5a789..a99ad1e 100644
--- a/airdef-mod/src/lib.rs
+++ b/airdef-mod/src/lib.rs
@@ -674,7 +674,7 @@ impl AirDef {
             }
             _ => replay::Mode::Map,
         };
-        self.replay = Some(replay::Player::new(n - 1, mode, &self.sim));
+        self.replay = Some(replay::Player::new(rec.number, mode, &self.sim));
         self.grid = false;
         input::claim_wheel(true);
         Ok(())
@@ -947,7 +947,7 @@ impl Mod for AirDef {
                         _ => replay::Control::Pause,
                     };
                     if let Some(r) = &mut self.replay
-                        && let Some(rec) = self.sim.replays.get(r.rec)
+                        && let Some(rec) = self.sim.replay(r.rec)
                     {
                         r.control(c, rec);
                     }
@@ -964,7 +964,7 @@ impl Mod for AirDef {
                 }
                 Event::Wheel(w) => {
                     if let Some(r) = &mut self.replay
-                        && let Some(rec) = self.sim.replays.get(r.rec)
+                        && let Some(rec) = self.sim.replay(r.rec)
                     {
                         r.wheel(w, rec);
                     }
diff --git a/airdef-mod/src/replay.rs b/airdef-mod/src/replay.rs
index b82990f..230fbe6 100644
--- a/airdef-mod/src/replay.rs
+++ b/airdef-mod/src/replay.rs
@@ -31,8 +31,8 @@ pub struct Clip {
 }
 
 pub struct Player {
-    /// Which of the sim's recordings.
-    pub rec: usize,
+    /// Which raid's recording (its number: the list drops the oldest as new ones come).
+    pub rec: u32,
     pub mode: Mode,
     t: f64,
     speed: f64,
@@ -188,7 +188,7 @@ pub fn reel(rec: &Recording) -> Vec<Clip> {
 }
 
 impl Player {
-    pub fn new(rec: usize, mode: Mode, sim: &Sim) -> Self {
+    pub fn new(rec: u32, mode: Mode, sim: &Sim) -> Self {
         let start = match &mode {
             Mode::Clips { list, .. } => list.first().map_or(0.0, |c| c.from),
             _ => 0.0,
@@ -291,7 +291,7 @@ impl Player {
 
     /// One tick: time runs, the ghosts fly, the director films. Models and sounds go to `out`.
     pub fn tick(&mut self, sim: &Sim, listener: DVec3, out: &mut Out) {
-        let Some(rec) = sim.replays.get(self.rec) else {
+        let Some(rec) = sim.replay(self.rec) else {
             self.done = true;
             return;
         };
@@ -491,7 +491,7 @@ impl Player {
 
     /// The replay's screen: the film with its titles, or the map.
     pub fn hud(&self, sim: &Sim, (gw, gh): (f32, f32)) -> Vec<Shape> {
-        let Some(rec) = sim.replays.get(self.rec) else { return Vec::new() };
+        let Some(rec) = sim.replay(self.rec) else { return Vec::new() };
         if matches!(self.mode, Mode::Map) {
             return self.map(rec, gw, gh);
         }
diff --git a/airdef-mod/src/sim/damage.rs b/airdef-mod/src/sim/damage.rs
index 262d074..cb6dca2 100644
--- a/airdef-mod/src/sim/damage.rs
+++ b/airdef-mod/src/sim/damage.rs
@@ -179,6 +179,10 @@ impl Sim {
             sam.burn = 0;
             sam.state = SamState::Search;
             sam.reloading = 0;
+            sam.empty = false;
+            // Rebuilt where it stands: a march under way is called off.
+            sam.dest = None;
+            sam.march = 0;
             sam.missiles = spec.missile.as_ref().map_or(0, |m| m.magazine);
             sam.bursts = spec.gun.as_ref().map_or(0, |g| g.bursts);
         }
diff --git a/airdef-mod/src/sim/lights.rs b/airdef-mod/src/sim/lights.rs
index 0a14cd1..6c68051 100644
--- a/airdef-mod/src/sim/lights.rs
+++ b/airdef-mod/src/sim/lights.rs
@@ -113,11 +113,13 @@ impl Sim {
                 self.lit.push(t);
             }
             let mut along = 1.0;
-            for k in 0..10u32 {
+            // Up to 14 segments (the unit's part ids 2..15), each longer than the last: one
+            // reaches about 550 blocks, past the beam's reach, about 9 blocks wide out there.
+            for k in 0..14u32 {
                 if along >= reach {
                     break;
                 }
-                let size = 0.8 + along * 0.025;
+                let size = 0.8 + along * 0.12;
                 let len = 3.0 * size;
                 out.model(id + 2 + k, "airdef:beam", head + dir * (along + len / 2.0), rot, size, true);
                 along += len;
diff --git a/airdef-mod/src/sim/mod.rs b/airdef-mod/src/sim/mod.rs
index 8a3eb11..db0c176 100644
--- a/airdef-mod/src/sim/mod.rs
+++ b/airdef-mod/src/sim/mod.rs
@@ -1272,6 +1272,10 @@ impl Sim {
         self.queue.clear();
         self.plan = None;
         self.wave = None;
+        // Ammunition still to cook off, flares in the sky.
+        self.later.clear();
+        self.flares.clear();
+        self.lit.clear();
     }
 
     /// One game tick.
@@ -1845,7 +1849,7 @@ impl Sim {
                         };
                         for b in barrels {
                             let muzzle = mount + rot * *b * s;
-                            let dir = (lead - muzzle).normalize();
+                            let dir = (lead - muzzle).normalize_or(DVec3::NEG_Z);
                             let len = muzzle.distance(lead).min(gun.range * 1.2);
                             // Every round is a red tracer flying out at the shell's speed.
                             let scatter = DVec3::new(self.rng.s(), self.rng.s(), self.rng.s()) * 0.012;
diff --git a/airdef-mod/src/sim/raid.rs b/airdef-mod/src/sim/raid.rs
index e943c99..ca28644 100644
--- a/airdef-mod/src/sim/raid.rs
+++ b/airdef-mod/src/sim/raid.rs
@@ -195,6 +195,11 @@ impl Sim {
     /// (each route found in full, a few a tick) and launched when its plan is ready.
     pub fn order_raid(&mut self, order: &RaidOrder, objects: &[DVec3], out: &mut Out) -> u32 {
         let Some(&centre) = objects.first() else { return 0 };
+        // One raid is planned at a time: another order waits for this one's drones to be sent.
+        if self.plan.is_some() {
+            out.messages.push("Противник ещё готовит прошлый налёт: подожди пару секунд".into());
+            return 0;
+        }
         let total: u32 = order.kinds.iter().map(|k| k.1).sum();
         if total == 0 {
             return 0;
@@ -473,7 +478,8 @@ impl Sim {
         let kills = self.kills - w.kills;
         let through = self.hits - w.hits;
         let launched = self.launched - w.launched;
-        let fired: u32 = self.sams.iter().map(|s| s.fired).sum::<u32>() - w.fired;
+        // A system taken away during the raid takes its count along: never below none.
+        let fired: u32 = self.sams.iter().map(|s| s.fired).sum::<u32>().saturating_sub(w.fired);
         let lost = w.sams.saturating_sub(self.sams.iter().filter(|s| s.alive()).count());
         let objects = if self.target_health.is_empty() {
             String::new()
diff --git a/airdef-mod/src/sim/record.rs b/airdef-mod/src/sim/record.rs
index 82161bf..262df78 100644
--- a/airdef-mod/src/sim/record.rs
+++ b/airdef-mod/src/sim/record.rs
@@ -142,6 +142,13 @@ impl Recording {
     }
 }
 
+impl Sim {
+    /// The recording of raid `number`, while it is kept.
+    pub fn replay(&self, number: u32) -> Option<&Recording> {
+        self.replays.iter().find(|r| r.number == number)
+    }
+}
+
 impl Sim {
     /// Something worth a replay happened.
     pub(super) fn log(&mut self, pos: DVec3, kind: EventKind) {
diff --git a/tools/airdef.py b/tools/airdef.py
index 622f66b..b46bd90 100644
--- a/tools/airdef.py
+++ b/tools/airdef.py
@@ -80,7 +80,9 @@ def fork():
                            capture_output=True, text=True).stdout.strip()
     if dirty:
         sys.exit("horizon/: есть незакоммиченные изменения, а движок надо обновить. Закоммить или убери их и запусти снова.")
-    if branch == "airdef":
+    exists = subprocess.run(["git", "-C", FORK, "rev-parse", "--verify", "-q", "refs/heads/airdef"],
+                            capture_output=True).returncode == 0
+    if exists:
         print("horizon/: коммит или патчи изменились, ветка airdef пересобирается (прежняя: airdef-prev)")
         run(["git", "-C", FORK, "branch", "-f", "airdef-prev", "airdef"])
     run(["git", "-C", FORK, "fetch", "--quiet", "origin", commit])