diff --git a/CHANGELOG.md b/CHANGELOG.md
index f1a7ecb..9cac86b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@
 - parser: Added support for OGNLT24 (LT24), OGSKYL (Skylines), OGSPID (Spider), OGSPOT (Spot) and OGNFNT (Fanet)
 - parser: Added support for (server) comments
 - parser: Added parser for local receiver output (port 50001)
+- parser: Changed unit for rotation from "half turn per minute" to "degrees/s"
 
 ## 0.8.2: - 2018-01-20
 - parser: Better validation of timestamp, lat/lon and altitude
diff --git a/ogn/parser/aprs_comment/flarm_parser.py b/ogn/parser/aprs_comment/flarm_parser.py
index ec65953..71e52da 100644
--- a/ogn/parser/aprs_comment/flarm_parser.py
+++ b/ogn/parser/aprs_comment/flarm_parser.py
@@ -1,7 +1,7 @@
 import re
 
 from ogn.parser.pattern import PATTERN_FLARM_POSITION_COMMENT
-from ogn.parser.utils import FPM_TO_MS
+from ogn.parser.utils import FPM_TO_MS, HPM_TO_DEGS
 
 from .base import BaseParser
 
@@ -18,7 +18,7 @@ class FlarmParser(BaseParser):
                 'stealth': (int(ac_match.group('details'), 16) & 0b10000000) >> 7 == 1,
                 'address': ac_match.group('address'),
                 'climb_rate': int(ac_match.group('climb_rate')) * FPM_TO_MS,
-                'turn_rate': float(ac_match.group('turn_rate')),
+                'turn_rate': float(ac_match.group('turn_rate')) * HPM_TO_DEGS,
                 'signal_quality': float(ac_match.group('signal_quality')),
                 'error_count': int(ac_match.group('error_count')),
                 'frequency_offset': float(ac_match.group('frequency_offset')),
diff --git a/ogn/parser/aprs_comment/naviter_parser.py b/ogn/parser/aprs_comment/naviter_parser.py
index 9f589e4..b411f9b 100644
--- a/ogn/parser/aprs_comment/naviter_parser.py
+++ b/ogn/parser/aprs_comment/naviter_parser.py
@@ -1,7 +1,7 @@
 import re
 
 from ogn.parser.pattern import PATTERN_NAVITER_POSITION_COMMENT
-from ogn.parser.utils import FPM_TO_MS
+from ogn.parser.utils import FPM_TO_MS, HPM_TO_DEGS
 
 from .base import BaseParser
 
@@ -20,4 +20,4 @@ class NaviterParser(BaseParser):
                 'reserved': (int(match.group('details'), 16) & 0b0000000000001111),
                 'address': match.group('address'),
                 'climb_rate': int(match.group('climb_rate')) * FPM_TO_MS if match.group('climb_rate') else None,
-                'turn_rate': float(match.group('turn_rate')) if match.group('turn_rate') else None}
+                'turn_rate': float(match.group('turn_rate')) * HPM_TO_DEGS if match.group('turn_rate') else None}
diff --git a/ogn/parser/aprs_comment/ogn_parser.py b/ogn/parser/aprs_comment/ogn_parser.py
index bf17331..0f8ddf4 100644
--- a/ogn/parser/aprs_comment/ogn_parser.py
+++ b/ogn/parser/aprs_comment/ogn_parser.py
@@ -1,6 +1,6 @@
 import re
 
-from ogn.parser.utils import FPM_TO_MS
+from ogn.parser.utils import FPM_TO_MS, HPM_TO_DEGS
 from ogn.parser.pattern import PATTERN_RECEIVER_BEACON, PATTERN_AIRCRAFT_BEACON
 
 from .base import BaseParser
@@ -36,7 +36,7 @@ class OgnParser(BaseParser):
                     'stealth': (int(ac_match.group('details'), 16) & 0b10000000) >> 7 == 1,
                     'address': ac_match.group('address'),
                     'climb_rate': int(ac_match.group('climb_rate')) * FPM_TO_MS if ac_match.group('climb_rate') else None,
-                    'turn_rate': float(ac_match.group('turn_rate')) if ac_match.group('turn_rate') else None,
+                    'turn_rate': float(ac_match.group('turn_rate')) * HPM_TO_DEGS if ac_match.group('turn_rate') else None,
                     'flightlevel': float(ac_match.group('flight_level')) if ac_match.group('flight_level') else None,
                     'signal_quality': float(ac_match.group('signal_quality')) if ac_match.group('signal_quality') else None,
                     'error_count': int(ac_match.group('errors')) if ac_match.group('errors') else None,
diff --git a/ogn/parser/aprs_comment/tracker_parser.py b/ogn/parser/aprs_comment/tracker_parser.py
index 24297ce..1b0f2f5 100644
--- a/ogn/parser/aprs_comment/tracker_parser.py
+++ b/ogn/parser/aprs_comment/tracker_parser.py
@@ -1,7 +1,7 @@
 import re
 
 from ogn.parser.pattern import PATTERN_TRACKER_POSITION_COMMENT, PATTERN_TRACKER_STATUS_COMMENT
-from ogn.parser.utils import FPM_TO_MS
+from ogn.parser.utils import FPM_TO_MS, HPM_TO_DEGS
 
 from .base import BaseParser
 
@@ -18,7 +18,7 @@ class TrackerParser(BaseParser):
                 'stealth': (int(match.group('details'), 16) & 0b10000000) >> 7 == 1,
                 'address': match.group('address'),
                 'climb_rate': int(match.group('climb_rate')) * FPM_TO_MS if match.group('climb_rate') else None,
-                'turn_rate': float(match.group('turn_rate')) if match.group('turn_rate') else None,
+                'turn_rate': float(match.group('turn_rate')) * HPM_TO_DEGS if match.group('turn_rate') else None,
                 'flightlevel': float(match.group('flight_level')) if match.group('flight_level') else None,
                 'signal_quality': float(match.group('signal_quality')) if match.group('signal_quality') else None,
                 'error_count': int(match.group('error_count')) if match.group('error_count') else None,
diff --git a/ogn/parser/utils.py b/ogn/parser/utils.py
index 34cf7db..ce50e6c 100644
--- a/ogn/parser/utils.py
+++ b/ogn/parser/utils.py
@@ -7,6 +7,7 @@ FEETS_TO_METER = 0.3048             # ratio feets to meter
 FPM_TO_MS = FEETS_TO_METER / 60     # ratio fpm to m/s
 KNOTS_TO_MS = 0.5144                # ratio knots to m/s
 KPH_TO_MS = 2.7778                  # ratio kph to m/s
+HPM_TO_DEGS = 180 / 60              # ratio between half turn per minute and degrees/s
 
 
 def parseAngle(dddmmhht):
diff --git a/tests/parser/test_parse_flarm.py b/tests/parser/test_parse_flarm.py
index d6f3b48..ed38665 100644
--- a/tests/parser/test_parse_flarm.py
+++ b/tests/parser/test_parse_flarm.py
@@ -1,6 +1,6 @@
 import unittest
 
-from ogn.parser.utils import FPM_TO_MS
+from ogn.parser.utils import FPM_TO_MS, HPM_TO_DEGS
 from ogn.parser.aprs_comment.flarm_parser import FlarmParser
 
 
@@ -13,7 +13,7 @@ class TestStringMethods(unittest.TestCase):
         self.assertFalse(message['stealth'])
         self.assertEqual(message['address'], "A8CBA8")
         self.assertAlmostEqual(message['climb_rate'], -39 * FPM_TO_MS, 2)
-        self.assertEqual(message['turn_rate'], 0.1)
+        self.assertEqual(message['turn_rate'], 0.1 * HPM_TO_DEGS)
         self.assertEqual(message['signal_quality'], 3.5)
         self.assertEqual(message['error_count'], 2)
         self.assertEqual(message['frequency_offset'], -8.7)
diff --git a/tests/parser/test_parse_naviter.py b/tests/parser/test_parse_naviter.py
index eee8604..271cfa6 100644
--- a/tests/parser/test_parse_naviter.py
+++ b/tests/parser/test_parse_naviter.py
@@ -1,6 +1,6 @@
 import unittest
 
-from ogn.parser.utils import FPM_TO_MS
+from ogn.parser.utils import FPM_TO_MS, HPM_TO_DEGS
 from ogn.parser.aprs_comment.naviter_parser import NaviterParser
 
 
@@ -23,7 +23,7 @@ class TestStringMethods(unittest.TestCase):
         self.assertEqual(message['address'], "042121")
 
         self.assertAlmostEqual(message['climb_rate'], 123 * FPM_TO_MS, 2)
-        self.assertEqual(message['turn_rate'], 0.5)
+        self.assertEqual(message['turn_rate'], 0.5 * HPM_TO_DEGS)
 
 
 if __name__ == '__main__':
diff --git a/tests/parser/test_parse_ogn_aircraft.py b/tests/parser/test_parse_ogn_aircraft.py
index f0d3f1a..f175c6c 100644
--- a/tests/parser/test_parse_ogn_aircraft.py
+++ b/tests/parser/test_parse_ogn_aircraft.py
@@ -1,6 +1,6 @@
 import unittest
 
-from ogn.parser.utils import FPM_TO_MS
+from ogn.parser.utils import FPM_TO_MS, HPM_TO_DEGS
 from ogn.parser.aprs_comment.ogn_parser import OgnParser
 
 
@@ -16,7 +16,7 @@ class TestStringMethods(unittest.TestCase):
         self.assertFalse(message['stealth'])
         self.assertEqual(message['address'], "DDA5BA")
         self.assertAlmostEqual(message['climb_rate'], -454 * FPM_TO_MS, 2)
-        self.assertEqual(message['turn_rate'], -1.1)
+        self.assertEqual(message['turn_rate'], -1.1 * HPM_TO_DEGS)
         self.assertEqual(message['signal_quality'], 8.8)
         self.assertEqual(message['error_count'], 0)
         self.assertEqual(message['frequency_offset'], 51.2)
diff --git a/tests/parser/test_parse_tracker.py b/tests/parser/test_parse_tracker.py
index 81c8a7c..0ca18fd 100644
--- a/tests/parser/test_parse_tracker.py
+++ b/tests/parser/test_parse_tracker.py
@@ -1,6 +1,6 @@
 import unittest
 
-from ogn.parser.utils import FPM_TO_MS
+from ogn.parser.utils import FPM_TO_MS, HPM_TO_DEGS
 from ogn.parser.aprs_comment.tracker_parser import TrackerParser
 
 
@@ -13,7 +13,7 @@ class TestStringMethods(unittest.TestCase):
         self.assertFalse(message['stealth'])
         self.assertEqual(message['address'], "2FD00F")
         self.assertAlmostEqual(message['climb_rate'], -58 * FPM_TO_MS, 2)
-        self.assertEqual(message['turn_rate'], 1.1)
+        self.assertEqual(message['turn_rate'], 1.1 * HPM_TO_DEGS)
         self.assertEqual(message['flightlevel'], 3.12)
         self.assertEqual(message['signal_quality'], 32.8)
         self.assertEqual(message['error_count'], 0)