diff --git a/opendis/dis7.py b/opendis/dis7.py
index b7f7189..eefd59a 100644
--- a/opendis/dis7.py
+++ b/opendis/dis7.py
@@ -5403,7 +5403,7 @@ def __init__(self):
         self.numberOfTargetsInTrackJam = 0
         self.highDensityTrackJam = 0
         self.jammingModeSequence = 0
-        self.trackJamRecord = TrackJamData();
+        self.trackJamRecords = [];
 
     def serialize(self, outputStream):
         outputStream.write_unsigned_byte(self.systemDataLength);
@@ -5420,7 +5420,9 @@ def serialize(self, outputStream):
         outputStream.read_unsigned_byte(self.highDensityTrackJam);
         outputStream.read_unsigned_byte(0); # 8 bit padding
         outputStream.read_unsigned_int(self.jammingModeSequence);
-        self.trackJamRecord.serialize(outputStream);
+
+        for anObj in self.trackJamRecords:
+            anObj.serialize(outputStream)
 
     def parse(self, inputStream):
         self.systemDataLength = inputStream.read_unsigned_byte();
@@ -5437,7 +5439,11 @@ def parse(self, inputStream):
         self.highDensityTrackJam = inputStream.read_unsigned_byte();
         inputStream.read_unsigned_byte(); # 8 bit padding
         self.jammingModeSequence = inputStream.read_unsigned_int();
-        self.trackJamRecord.parse(inputStream);
+
+        for idx in range(0, self.numberOfTargetsInTrackJam):
+            element = TrackJamData()
+            element.parse(inputStream)
+            self.trackJamRecords.append(element)
 
 
 class ResupplyOfferPdu( LogisticsFamilyPdu ):
diff --git a/tests/testElectromageneticEmissionPdu.py b/tests/testElectromageneticEmissionPdu.py
index c3a1f2a..2f8bfb7 100644
--- a/tests/testElectromageneticEmissionPdu.py
+++ b/tests/testElectromageneticEmissionPdu.py
@@ -51,11 +51,11 @@ def test_parse(self):
         self.assertEqual(0, pdu.systems[0].highDensityTrackJam)
         self.assertEqual(0, pdu.systems[0].jammingModeSequence)
 
-        self.assertEqual(23, pdu.systems[0].trackJamRecord.entityID.siteID)
-        self.assertEqual(1, pdu.systems[0].trackJamRecord.entityID.applicationID)
-        self.assertEqual(1, pdu.systems[0].trackJamRecord.entityID.entityID)
-        self.assertEqual(0, pdu.systems[0].trackJamRecord.emitterNumber)
-        self.assertEqual(0, pdu.systems[0].trackJamRecord.beamNumber)
+        self.assertEqual(23, pdu.systems[0].trackJamRecords[0].entityID.siteID)
+        self.assertEqual(1, pdu.systems[0].trackJamRecords[0].entityID.applicationID)
+        self.assertEqual(1, pdu.systems[0].trackJamRecords[0].entityID.entityID)
+        self.assertEqual(0, pdu.systems[0].trackJamRecords[0].emitterNumber)
+        self.assertEqual(0, pdu.systems[0].trackJamRecords[0].beamNumber)
         
 
 if __name__ == '__main__':