diff --git a/heliwatch/src/adsb.rs b/heliwatch/src/adsb.rs
index 73f020b..c21bc3b 100644
--- a/heliwatch/src/adsb.rs
+++ b/heliwatch/src/adsb.rs
@@ -6,10 +6,21 @@ use tokio::sync::mpsc::{channel, Receiver};
 use super::location::Locations;
 
 /// ft
-const MAX_ALTITUDE: u16 = 5000;
+const MAX_ALTITUDE: u16 = 10_000;
 /// s
 const STATE_TIMEOUT: u64 = 180;
 
+const IGNORED_CATEGORIES: &[u8] = &[
+    // Small (15,500..75,000) lbs
+    2,
+    // Large (75,000..300,000 lbs)
+    3,
+    // High Vortex Large
+    4,
+    // Heavy (> 300,000 lbs)
+    5,
+];
+
 #[derive(Debug, Clone)]
 pub struct Event {
     pub action: Action,
@@ -122,8 +133,8 @@ pub fn run(host: &'static str, port: u16, locations: Locations) -> Receiver<Even
                 let hex = format!("{}", icao_address);
                 let entry = entry.read().unwrap();
 
-                if entry.altitude.map(|altitude| altitude > MAX_ALTITUDE)
-                    .unwrap_or(false)
+                if entry.altitude.map(|altitude| altitude > MAX_ALTITUDE).unwrap_or(false) ||
+                    entry.emitter_category.as_ref().map(|category| IGNORED_CATEGORIES.contains(category)).unwrap_or(false)
                 {
                     if !ignored.contains(&hex) {
                         ignored.insert(hex.clone());