diff --git a/Cargo.lock b/Cargo.lock
index 2fd4fbe..d3f4b07 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -501,7 +501,6 @@ version = "0.12.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e4bc7e09282a82a48d70ade0c4c1154b0fd7882a735a39c66766a5d0f4718ea9"
 dependencies = [
- "bevy_dylib",
  "bevy_internal",
 ]
 
@@ -677,15 +676,6 @@ dependencies = [
  "sysinfo",
 ]
 
-[[package]]
-name = "bevy_dylib"
-version = "0.12.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "45b99001eb4837c78d9c63cc8b32fda61ea96b194a2cda54b569aeee69a9853c"
-dependencies = [
- "bevy_internal",
-]
-
 [[package]]
 name = "bevy_ecs"
 version = "0.12.1"
diff --git a/Cargo.toml b/Cargo.toml
index b1e2f41..2776397 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -30,7 +30,7 @@ opt-level = 3
 
 [workspace.dependencies]
 bevy = { version = "0.12", features = [
-    "dynamic_linking",
+    #    "dynamic_linking",
     "multi-threaded",
     "trace",
 ] }
diff --git a/crates/guardian_core/src/srs.rs b/crates/guardian_core/src/srs.rs
index 75568b8..e7671e5 100644
--- a/crates/guardian_core/src/srs.rs
+++ b/crates/guardian_core/src/srs.rs
@@ -162,7 +162,7 @@ fn listen_srs(
 
         let frequency = radio.frequency;
         let id = *id;
-        let voice = radio.voice;
+        let voice = radio.voice.clone();
         let stt_url = stt_url.as_str().to_string();
         radio.handle = Some(tokio.0.spawn(async move {
             loop {
@@ -520,19 +520,18 @@ fn handle_voice_command(
     }
 }
 
-#[derive(Default, Clone, Copy, Debug, Deserialize, Serialize)]
-pub enum Voice {
-    #[default]
-    David,
-    Zira,
+#[derive(Default, Clone, Debug, Deserialize, Serialize)]
+pub struct Voice(String);
+
+impl Voice {
+    pub fn new(voice: impl Into<String>) -> Self {
+        Self(voice.into())
+    }
 }
 
 impl std::fmt::Display for Voice {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        match self {
-            Self::David => write!(f, "David"),
-            Self::Zira => write!(f, "Zira"),
-        }
+        write!(f, "{}", self.0)
     }
 }
 
diff --git a/src/commands/bogeydope.rs b/src/commands/bogeydope.rs
index 26bb4fb..7f3e194 100644
--- a/src/commands/bogeydope.rs
+++ b/src/commands/bogeydope.rs
@@ -47,11 +47,11 @@ pub fn bogey_dope(
         return;
     };
 
-    let mut distance: f64 = 0.0;
+    let mut distance: f64 = f64::MAX;
     let mut n = (None, None);
     for (n_pos, n_heading) in npc.iter() {
         let d = p_pos.distance_to_nmi(n_pos);
-        if distance < d {
+        if d < distance {
             distance = d;
             n = (Some(n_pos), Some(n_heading));
         }
diff --git a/src/config.rs b/src/config.rs
index 0ad67f0..816eb06 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -57,7 +57,7 @@ impl Config {
             ChannelConfig {
                 frequency: 251000000,
                 modulation: Modulation::Am,
-                voice: Voice::David,
+                voice: Voice::new("David"),
             },
         );
 
diff --git a/src/main.rs b/src/main.rs
index 43cf6dd..093a3a3 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -67,7 +67,7 @@ fn give_awacs_radio(
         commands.entity(ent).insert(Radio::new(
             channel.frequency,
             channel.modulation,
-            channel.voice,
+            channel.voice.clone(),
         ));
     }
 }
diff --git a/src/tripwire.rs b/src/tripwire.rs
index b6d050c..04233da 100644
--- a/src/tripwire.rs
+++ b/src/tripwire.rs
@@ -45,6 +45,10 @@ fn tripwire(
             }
 
             for (n_id, n_position, n_heading) in npc.iter() {
+                if n_position.angels() == 0 {
+                    // ignore on-ground units
+                    continue;
+                }
                 let distance = n_position.distance_to_nmi(p_position);
                 if distance <= p_tripwire.range && !p_tripwire.reported.contains(n_id) {
                     p_tripwire.reported.push(*n_id);