diff --git a/chasemapper/geometry.py b/chasemapper/geometry.py
index 8e62fe8..33694b1 100644
--- a/chasemapper/geometry.py
+++ b/chasemapper/geometry.py
@@ -92,8 +92,10 @@ class GenericTrack(object):
             # Basic ascent rate case - only 2 samples.
             _time_delta = (self.track_history[-1][0] - self.track_history[-2][0]).total_seconds()
             _altitude_delta = self.track_history[-1][3] - self.track_history[-2][3]
+
             return _altitude_delta/_time_delta
 
+
         else:
             _num_samples = min(len(self.track_history), self.ASCENT_AVERAGING)
             _asc_rates = []
diff --git a/horusmapper.py b/horusmapper.py
index d518d56..caa874f 100644
--- a/horusmapper.py
+++ b/horusmapper.py
@@ -66,6 +66,11 @@ car_track = GenericTrack()
 habitat_uploader = None
 
 
+# Copy out any extra fields from incoming telemetry that we want to pass on to the GUI.
+# At the moment we're really only using the burst timer field.
+EXTRA_FIELDS = ['bt', 'temp', 'humidity', 'sats']
+
+
 #
 #   Flask Routes
 #
@@ -173,13 +178,14 @@ def handle_new_payload_position(data):
         current_payload_tracks[_callsign] = GenericTrack()
 
         current_payloads[_callsign] = {
-            'telem': {'callsign': _callsign, 'position':[_lat, _lon, _alt], 'vel_v':0.0, 'speed':0.0, 'short_time':_short_time, 'time_to_landing':"", 'server_time':time.time()},
+            'telem': {'callsign': _callsign, 'position':[_lat, _lon, _alt], 'max_alt':0.0, 'vel_v':0.0, 'speed':0.0, 'short_time':_short_time, 'time_to_landing':"", 'server_time':time.time()},
             'path': [],
             'pred_path': [],
             'pred_landing': [],
             'burst': [],
             'abort_path': [],
-            'abort_landing': []
+            'abort_landing': [],
+            'max_alt': 0.0
         }
 
     # Add new data into the payload's track, and get the latest ascent rate.
@@ -223,10 +229,23 @@ def handle_new_payload_position(data):
         'speed':_speed,
         'short_time':_short_time,
         'time_to_landing': _ttl,
-        'server_time':time.time()}
+        'server_time':time.time()
+        }
 
     current_payloads[_callsign]['path'].append([_lat, _lon, _alt])
 
+    # Copy out any extra fields we may want to pass onto the GUI.
+    for _field in EXTRA_FIELDS:
+        if _field in data:
+            current_payloads[_callsign]['telem'][_field] = data[_field]
+
+    # Check if the current payload altitude is higher than our previous maximum altitude.
+    if _alt > current_payloads[_callsign]['max_alt']:
+        current_payloads[_callsign]['max_alt'] = _alt
+
+    # Add the payload maximum altitude into the telemetry snapshot dictionary.
+    current_payloads[_callsign]['telem']['max_alt'] = current_payloads[_callsign]['max_alt']
+
     # Update the web client.
     flask_emit_event('telemetry_event', current_payloads[_callsign]['telem'])
 
@@ -528,6 +547,11 @@ def udp_listener_summary_callback(data):
         # Otherwise use the current UTC time.
         output['time_dt'] = datetime.utcnow()
 
+    # Copy out any extra fields that we want to pass on to the GUI.
+    for _field in EXTRA_FIELDS:
+        if _field in data:
+            output[_field] = data[_field]
+
     try:
         handle_new_payload_position(output)
     except Exception as e:
diff --git a/static/js/tables.js b/static/js/tables.js
index cc580c5..a001af9 100644
--- a/static/js/tables.js
+++ b/static/js/tables.js
@@ -34,7 +34,8 @@ function initTables(){
             {title:"Latitude", field:"lat", headerSort:false},
             {title:"Longitude", field:"lon", headerSort:false},
             {title:"Alt (m)", field:"alt", headerSort:false},
-            {title:"V_rate (m/s)", field:"vel_v", headerSort:false}
+            {title:"V_rate (m/s)", field:"vel_v", headerSort:false},
+            {title:"Aux", field:'aux', headerSort:false}
         ]
     });
 
@@ -73,9 +74,18 @@ function updateTelemetryTable(){
             // Modify some of the fields to fixed point values.
             balloon_call_data.lat = balloon_call_data.position[0].toFixed(5);
             balloon_call_data.lon = balloon_call_data.position[1].toFixed(5);
-            balloon_call_data.alt = balloon_call_data.position[2].toFixed(1);
+            balloon_call_data.alt = balloon_call_data.position[2].toFixed(1) + " (" + balloon_call_data.max_alt.toFixed(0) + ")" ;
             balloon_call_data.vel_v = balloon_call_data.vel_v.toFixed(1);
 
+            // Add in any extra data to the aux field.
+            balloon_call_data.aux = "";
+
+            if (balloon_call_data.hasOwnProperty('bt')){
+                if ((balloon_call_data.bt >= 0) && (balloon_call_data.bt < 65535)) {
+                    balloon_call_data.aux += "BT " + new Date(balloon_call_data.bt*1000).toISOString().substr(11, 8) + " ";
+                }
+            }
+
             // Update table
             telem_data.push(balloon_call_data);
         }
diff --git a/templates/index.html b/templates/index.html
index bc570b4..bd0ecd7 100644
--- a/templates/index.html
+++ b/templates/index.html
@@ -479,7 +479,7 @@
                     // There is balloon data!
                     var _latest_telem = balloon_positions[balloon_currently_following].latest_data;
                     
-                    _summary_update.alt = _latest_telem.position[2].toFixed(0) + "m";
+                    _summary_update.alt = _latest_telem.position[2].toFixed(0) + "m (" + _latest_telem.max_alt.toFixed(0) + ")";
                     var _speed = _latest_telem.speed*3.6;
                     _summary_update.speed = _speed.toFixed(0) + " kph";
                     _summary_update.vel_v = _latest_telem.vel_v.toFixed(1) + " m/s";
@@ -530,7 +530,7 @@
 
                 if(initial_load_complete == false){
                     // If we have not completed our initial load of telemetry data, discard this data.
-                    return
+                    return;
                 }
 
                 // Handle chase car position updates.
@@ -603,7 +603,7 @@
                         }
 
                         if (data.position[2] < parachute_min_alt){
-                            balloon_positions[data.callsign].marker.setIcon(balloonPayloadIcons[balloon_positions[callsign].colour]);
+                            balloon_positions[data.callsign].marker.setIcon(balloonPayloadIcons[balloon_positions[data.callsign].colour]);
                         }
                     }