diff --git a/src/libais/ais.h b/src/libais/ais.h
index 4619db19..9b3bc20e 100644
--- a/src/libais/ais.h
+++ b/src/libais/ais.h
@@ -850,6 +850,23 @@ class Ais6_1_40 : public Ais6 {
 };
 ostream& operator<< (ostream &o, const Ais6_1_40 &msg);
 
+// Number of persons on board.  ITU 1371-1
+class Ais6_235_10 : public Ais6 {
+ public:
+  float ana_int;
+  float ana_ext1;
+  float ana_ext2;
+  int racon;
+  int light;
+  bool health;
+  int stat_ext;
+  bool off_pos;
+  int spare2;
+
+  Ais6_235_10(const char *nmea_payload, const size_t pad);
+};
+ostream& operator<< (ostream &o, const Ais6_235_10 &msg);
+
 //////////////////////////////////////////////////////////////////////
 
 // 7 and 13 are ACKs for msg 6 and 12
diff --git a/src/libais/ais6.cpp b/src/libais/ais6.cpp
index bd4c245e..672e5564 100644
--- a/src/libais/ais6.cpp
+++ b/src/libais/ais6.cpp
@@ -561,4 +561,37 @@ Ais6_1_40::Ais6_1_40(const char *nmea_payload, const size_t pad)
   status = AIS_OK;
 }
 
+// This message provides AtoN (Aid to navigation) monitoring data for the General Lighthouse Authorities (GLA)
+Ais6_235_10::Ais6_235_10(const char *nmea_payload, const size_t pad)
+    : Ais6(nmea_payload, pad), ana_int(0.0), ana_ext1(0.0), ana_ext2(0.0), racon(0), light(0), health(0), stat_ext(0), off_pos(0), spare2(0) {
+  assert(dac == 235);
+  assert(fi == 10);
+
+  if (num_bits != 136) {
+    status = AIS_ERR_BAD_BIT_COUNT;
+    return;
+  }
+
+  AisBitset bs;
+  const AIS_STATUS r = bits.ParseNmeaPayload(nmea_payload, pad);
+  if (r != AIS_OK) {
+    status = r;
+    return;
+  }
+
+  bits.SeekTo(88);
+  ana_int = bits.ToUnsignedInt(88, 10) / 20.;
+  ana_ext1 = bits.ToUnsignedInt(98, 10) / 20.;
+  ana_ext2 = bits.ToUnsignedInt(108, 10) / 20.;
+  racon = bits.ToUnsignedInt(118, 2);
+  light = bits.ToUnsignedInt(120, 2);
+  health = static_cast<bool>(bits[122]);
+  stat_ext = bits.ToUnsignedInt(123, 8);
+  off_pos = static_cast<bool>(bits[131]);
+  spare2 = bits.ToUnsignedInt(132, 4);
+
+  assert(bits.GetRemaining() == 0);
+  status = AIS_OK;
+}
+
 }  // namespace libais
diff --git a/src/libais/ais_py.cpp b/src/libais/ais_py.cpp
index a0fcce67..c21db147 100644
--- a/src/libais/ais_py.cpp
+++ b/src/libais/ais_py.cpp
@@ -36,7 +36,7 @@ enum AIS_FI {
   AIS_FI_6_200_21_RIS_VTS_ETA = 21,
   AIS_FI_6_200_22_RIS_VTS_RTA = 22,
   AIS_FI_6_200_55_RIS_VTS_SAR = 55,
-
+  AIS_FI_6_235_10_ATON_MONITORING_DATA = 10,
   AIS_FI_8_1_0_TEXT = 0,
   AIS_FI_8_1_11_MET_HYDRO = 11,
   AIS_FI_8_1_13_FAIRWAY_CLOSED = 13,
@@ -698,6 +698,30 @@ ais6_1_40_append_pydict(const char *nmea_payload, PyObject *dict,
   return AIS_OK;
 }
 
+AIS_STATUS
+ais6_235_10_append_pydict(const char *nmea_payload, PyObject *dict,
+                        const size_t pad) {
+  assert(nmea_payload);
+  assert(dict);
+  assert(pad < 6);
+  Ais6_235_10 msg(nmea_payload, pad);
+  if (msg.had_error()) {
+    return msg.get_error();
+  }
+
+  DictSafeSetItem(dict, "ana_int", msg.ana_int);
+  DictSafeSetItem(dict, "ana_ext1", msg.ana_ext1);
+  DictSafeSetItem(dict, "ana_ext2", msg.ana_ext2);
+  DictSafeSetItem(dict, "racon", msg.racon);
+  DictSafeSetItem(dict, "light", msg.light);
+  DictSafeSetItem(dict, "health", msg.health);
+  DictSafeSetItem(dict, "stat_ext", msg.stat_ext);
+  DictSafeSetItem(dict, "off_pos", msg.off_pos);
+  DictSafeSetItem(dict, "spare2", msg.spare2);
+
+  return AIS_OK;
+}
+
 PyObject*
 ais6_to_pydict(const char *nmea_payload, const size_t pad) {
   assert(nmea_payload);
@@ -770,10 +794,19 @@ ais6_to_pydict(const char *nmea_payload, const size_t pad) {
       DictSafeSetItem(dict, "not_parsed", true);
     }
     break;
-
+  case AIS_DAC_235_UNITED_KINGDOM_OF_GREAT_BRITAIN_AND_NORTHERN_IRELAND:  // IMO.
+    switch (msg.fi) {
+    case AIS_FI_6_235_10_ATON_MONITORING_DATA:  //  IALA-A126.
+      status = ais6_235_10_append_pydict(nmea_payload, dict, pad);
+      break;
     default:
       // TODO(schwehr): Raise an exception?
       DictSafeSetItem(dict, "not_parsed", true);
+    }  
+    break;
+  default:
+    // TODO(schwehr): Raise an exception?
+    DictSafeSetItem(dict, "not_parsed", true);
   }
 
   if (status != AIS_OK) {
diff --git a/src/libais/decode_body.cpp b/src/libais/decode_body.cpp
index 0e6a1c9d..ad7e4502 100644
--- a/src/libais/decode_body.cpp
+++ b/src/libais/decode_body.cpp
@@ -66,6 +66,13 @@ unique_ptr<AisMsg> CreateAisMsg6(const string &body, const int fill_bits) {
       }
       // FI not handled.
       break;
+    case libais::AIS_DAC_235_UNITED_KINGDOM_OF_GREAT_BRITAIN_AND_NORTHERN_IRELAND:
+      switch (msg.fi) {
+        case 10:
+          return MakeUnique<libais::Ais6_235_10>(body.c_str(), fill_bits);
+      }
+      // FI not handled.
+      break;
   }
   return nullptr;
 }
diff --git a/test/test_data.py b/test/test_data.py
index 30f06a7a..9e0f2cf6 100644
--- a/test/test_data.py
+++ b/test/test_data.py
@@ -673,4 +673,25 @@
              'y': -2.5533333333333332}
   },
 
+  {
+    'nmea': [ '!AIVDM,1,1,4,B,6>jR0600V:C0>da4P106P00,2*02' ],
+    'result': {'id': 6,
+              'repeat_indicator': 0,
+              'mmsi': 992509976,
+              'seq': 0,
+              'mmsi_dest': 2500912,
+              'retransmit': True,
+              'spare': 0,
+              'dac': 235,
+              'fi': 10,
+              'ana_int': 13.699999809265137, 
+              'ana_ext1': 0.05000000074505806, 
+              'ana_ext2': 0.05000000074505806,
+              'racon': 2,
+              'light': 2,
+              'health': False,
+              'stat_ext': 0,
+              'off_pos': False,
+              'spare2': 0}
+  },
 ]