diff --git a/chasemapper/__init__.py b/chasemapper/__init__.py
index 03e9cb7..4226042 100644
--- a/chasemapper/__init__.py
+++ b/chasemapper/__init__.py
@@ -8,4 +8,4 @@
 
 # Now using Semantic Versioning (https://semver.org/)  MAJOR.MINOR.PATCH
 
-__version__ = "1.3.1"
+__version__ = "1.3.2"
diff --git a/chasemapper/bearings.py b/chasemapper/bearings.py
index 221bb35..810c8fb 100644
--- a/chasemapper/bearings.py
+++ b/chasemapper/bearings.py
@@ -44,6 +44,8 @@ class Bearings(object):
         # }
         self.bearings = {}
 
+        self.bearing_sources = []
+
         self.bearing_lock = Lock()
 
         # Internal record of the chase car position, which is updated with incoming GPS data.
@@ -183,6 +185,10 @@ class Bearings(object):
                     "source": _source,
                 }
 
+                # Allow override of the heading valid calculations if a hearing_override field is supplied
+                if "heading_override" in bearing:
+                    _new_bearing["heading_valid"] = bearing["heading_override"]
+
             elif bearing["bearing_type"] == "absolute":
                 # Absolute bearing - use the provided data as-is
 
@@ -213,6 +219,10 @@ class Bearings(object):
 
         self.bearings["%.4f" % _arrival_time] = _new_bearing
 
+        if _source not in self.bearing_sources:
+            self.bearing_sources.append(_source)
+            logging.info(f"Bearing Handler - New source of bearings: {_source}")
+
         # Now we need to do a clean-up of our bearing list.
         # At this point, we should always have at least 2 bearings in our store
         if len(self.bearings) == 1:
diff --git a/static/js/bearings.js b/static/js/bearings.js
index 8b64125..5c6e926 100644
--- a/static/js/bearings.js
+++ b/static/js/bearings.js
@@ -15,6 +15,8 @@
 
 var bearing_store = {};
 
+var bearing_sources = [];
+
 var bearings_on = true;
 var bearings_only_mode = false;
 
@@ -67,6 +69,7 @@ function destroyAllBearings(){
 	});
 
 	bearing_store = {};
+	bearing_sources = [];
 }
 
 
@@ -86,6 +89,11 @@ function bearingValid(bearing){
 		}
 	}
 
+	// Disable showing of this bearing if the source is not selected
+	if (!document.getElementById("bearing_source_" + bearing.source).checked){
+		_show_bearing = false;
+	}
+
 	return _show_bearing;
 }
 
@@ -106,6 +114,18 @@ function addBearing(timestamp, bearing, live){
 
 	bearing_store[timestamp] = bearing;
 
+	if ( !bearing_sources.includes(bearing.source)){
+		bearing_sources.push(bearing.source);
+		_new_bearing_div_name = "bearing_source_" + bearing.source;
+		bearing_sources_div = "<div class='paramRow'><b>Source: " + bearing.source + "</b> <input type='checkbox' class='paramSelector' id='"+_new_bearing_div_name+"'></div>";
+		$("#bearing_source_selector").append(bearing_sources_div);
+		$("#"+_new_bearing_div_name).prop('checked',true);
+
+		$("#"+_new_bearing_div_name).change(function(){
+			redrawBearings();
+		});
+	}
+
 	// Calculate the end position.
 	var _end = calculateDestination(L.latLng([bearing_store[timestamp].lat, bearing_store[timestamp].lon]), bearing_store[timestamp].true_bearing, bearing_length);
 
diff --git a/templates/index.html b/templates/index.html
index 86fbd5b..ffcb1e3 100644
--- a/templates/index.html
+++ b/templates/index.html
@@ -898,7 +898,6 @@
                     <b>Show Stationary Bearings</b> <input type="checkbox" class="paramSelector" id="showStationaryBearings">
                 </div>
 
-
                 <div class="paramRow">
                     <button type="button" class="paramSelector" id="clearBearingsBtn" onclick='destroyAllBearings();'>Clear Map</button></br>
                 </div>
@@ -906,6 +905,9 @@
                     <button type="button" class="paramSelector" id="flushBearingsBtn" onclick='flushBearings();'>Flush Bearing Store</button></br>
                 </div>
 
+                <h3>Bearing Sources</h3>
+                <div id="bearing_source_selector"></div>
+
                 <h3>Bearing Style</h3>
                 <div class="paramRow">
                     <b>Bearing Length (km)</b><input type="text" class="paramEntry" id="bearingLength" value="10"><br/>
diff --git a/utils/bearing_o_clock.py b/utils/bearing_o_clock.py
new file mode 100644
index 0000000..fa6d3bd
--- /dev/null
+++ b/utils/bearing_o_clock.py
@@ -0,0 +1,76 @@
+#!/usr/bin/env python
+#
+#   ChaseMapper - Bearing o'Clock
+#
+#   Add bearings based on O'Clock position (1 through 12)
+#   Run with: python bearing_o_clock.py bearing_source_name
+#
+#   Copyright (C) 2019  Mark Jessop <vk5qi@rfhead.net>
+#   Released under GNU GPL v3 or later
+#
+#   
+import json
+import socket
+import sys
+import time
+import datetime
+import traceback
+
+
+def send_relative_bearing(bearing, source, heading_override=False, udp_port=55672):
+    """
+    Send a basic relative bearing
+    """
+    packet = {
+        'type' : 'BEARING',
+        'bearing' : bearing,
+        'bearing_type': 'relative', 
+        'source': source
+    }
+
+    if heading_override:
+        packet["heading_override"] = True
+
+    # Set up our UDP socket
+    s = socket.socket(socket.AF_INET,socket.SOCK_DGRAM)
+    s.settimeout(1)
+    # Set up socket for broadcast, and allow re-use of the address
+    s.setsockopt(socket.SOL_SOCKET,socket.SO_BROADCAST,1)
+    s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
+    try:
+        s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEPORT, 1)
+    except:
+        pass
+    s.bind(('',udp_port))
+    try:
+        s.sendto(json.dumps(packet).encode('ascii'), ('<broadcast>', udp_port))
+    except socket.error:
+        s.sendto(json.dumps(packet).encode('ascii'), ('127.0.0.1', udp_port))
+
+
+if __name__ == "__main__":
+    if len(sys.argv) > 1:
+        _source = sys.argv[1]
+    else:
+        _source = "o_clock_entry"
+    
+    try:
+        while True:
+
+            print("Enter O-Clock Bearing (1-12):")
+            _val = input()
+
+            try:
+                _val_int = int(_val)
+
+                _bearing = (_val_int%12)*30
+
+                print(f"Sending Relative Bearing: {_bearing}")
+
+                send_relative_bearing(_bearing, _source, heading_override=True)
+            except Exception as e:
+                print(f"Error handling input: {str(e)}")
+    except KeyboardInterrupt:
+        sys.exit(0)
+            
+