def decode_msg_24(bit_arr: bitarray.bitarray) -> Dict[str, Any]:
"""
Static Data Report
Src: https://gpsd.gitlab.io/gpsd/AIVDM.html#_type_24_static_data_report
"""
get_int_from_data = partial(get_int, bit_arr)
data = {
'type': get_int_from_data(0, 6),
'repeat': get_int_from_data(8, 8),
'mmsi': get_mmsi(bit_arr, 8, 38),
'partno': get_int_from_data(38, 40)
}
d: Dict[str, Any]
if not data['partno']:
# Part A
d = {
'shipname': decode_bin_as_ascii6(bit_arr[40: 160])
}
else:
# Part B
d = {
'shiptype': ShipType(get_int_from_data(40, 48)),
'vendorid': decode_bin_as_ascii6(bit_arr[48: 66]),
'model': get_int_from_data(66, 70),
'serial': get_int_from_data(70, 90),
'callsign': decode_bin_as_ascii6(bit_arr[90: 132]),
'to_bow': get_int_from_data(132, 141),
'to_stern': get_int_from_data(141, 150),
'to_port': get_int_from_data(150, 156),
'to_starboard': get_int_from_data(156, 162),
'mothership_mmsi': get_mmsi(bit_arr, 132, 162)
}
data.update(d)
return data
def decode_msg_10(bit_arr: bitarray.bitarray) -> Dict[str, Any]:
"""
UTC/Date Inquiry
Src: https://gpsd.gitlab.io/gpsd/AIVDM.html#_type_10_utc_date_inquiry
"""
get_int_from_data = partial(get_int, bit_arr)
return {
'type': get_int_from_data(0, 6),
'repeat': get_int_from_data(6, 8),
'mmsi': get_mmsi(bit_arr, 8, 38),
'dest_mmsi': get_mmsi(bit_arr, 40, 70)
}
def decode_msg_12(bit_arr: bitarray.bitarray) -> Dict[str, Any]:
"""
Addressed Safety-Related Message
Src: https://gpsd.gitlab.io/gpsd/AIVDM.html#_type_12_addressed_safety_related_message
"""
get_int_from_data = partial(get_int, bit_arr)
return {
'type': get_int_from_data(0, 6),
'repeat': get_int_from_data(6, 8),
'mmsi': get_mmsi(bit_arr, 8, 38),
'seqno': get_int_from_data(38, 40),
'dest_mmsi': get_mmsi(bit_arr, 40, 70),
'retransmit': bit_arr[70],
'text': decode_bin_as_ascii6(bit_arr[72:])
}
def decode_msg_19(bit_arr: bitarray.bitarray) -> Dict[str, Any]:
"""
Extended Class B CS Position Report
Src: https://gpsd.gitlab.io/gpsd/AIVDM.html#_type_19_extended_class_b_cs_position_report
"""
get_int_from_data = partial(get_int, bit_arr)
return {
'type': get_int_from_data(0, 6),
'repeat': get_int_from_data(8, 8),
'mmsi': get_mmsi(bit_arr, 8, 38),
'speed': get_int_from_data(46, 56) * 0.1,
'accuracy': bit_arr[56],
'lon': get_int_from_data(57, 85, signed=True) / 600000.0,
'lat': get_int_from_data(85, 112, signed=True) / 600000.0,
'course': get_int_from_data(112, 124) * 0.1,
'heading': get_int_from_data(124, 133),
'second': get_int_from_data(133, 139),
'regional': get_int_from_data(139, 143),
'shipname': decode_bin_as_ascii6(bit_arr[143:263]),
'shiptype': ShipType(get_int_from_data(263, 271)),
'to_bow': get_int_from_data(271, 280),
'to_stern': get_int_from_data(280, 289),
'to_port': get_int_from_data(289, 295),
'to_starboard': get_int_from_data(295, 301),
'epfd': EpfdType(get_int_from_data(301, 305)),
'raim': bit_arr[305],
'dte': bit_arr[306],
'assigned': bit_arr[307],
}
def decode_msg_20(bit_arr: bitarray.bitarray) -> Dict[str, Any]:
"""
Data Link Management Message
Src: https://gpsd.gitlab.io/gpsd/AIVDM.html#_type_20_data_link_management_message
"""
get_int_from_data = partial(get_int, bit_arr)
return {
'type': get_int_from_data(0, 6),
'repeat': get_int_from_data(8, 8),
'mmsi': get_mmsi(bit_arr, 8, 38),
'offset1': get_int_from_data(40, 52),
'number1': get_int_from_data(52, 56),
'timeout1': get_int_from_data(56, 59),
'increment1': get_int_from_data(59, 70),
'offset2': get_int_from_data(70, 82),
'number2': get_int_from_data(82, 86),
'timeout2': get_int_from_data(86, 89),
'increment2': get_int_from_data(89, 100),
'offset3': get_int_from_data(100, 112),
'number3': get_int_from_data(112, 116),
'timeout3': get_int_from_data(116, 119),
'increment3': get_int_from_data(110, 130),
'offset4': get_int_from_data(130, 142),
'number4': get_int_from_data(142, 146),
'timeout4': get_int_from_data(146, 149),
'increment4': get_int_from_data(149, 160),
}
def decode_msg_21(bit_arr: bitarray.bitarray) -> Dict[str, Any]:
"""
Aid-to-Navigation Report
Src: https://gpsd.gitlab.io/gpsd/AIVDM.html#_type_21_aid_to_navigation_report
"""
get_int_from_data = partial(get_int, bit_arr)
return {
'type': get_int_from_data(0, 6),
'repeat': get_int_from_data(8, 8),
'mmsi': get_mmsi(bit_arr, 8, 38),
'aid_type': NavAid(get_int_from_data(38, 43)),
'name': decode_bin_as_ascii6(bit_arr[43:163]),
'accuracy': bit_arr[163],
'lon': get_int_from_data(164, 192, signed=True) / 600000.0,
'lat': get_int_from_data(192, 219, signed=True) / 600000.0,
'to_bow': get_int_from_data(219, 228),
'to_stern': get_int_from_data(228, 237),
'to_port': get_int_from_data(237, 243),
'to_starboard': get_int_from_data(243, 249),
'epfd': EpfdType(get_int_from_data(249, 253)),
'second': get_int_from_data(253, 259),
'off_position': bit_arr[259],
'regional': get_int_from_data(260, 268),
'raim': bit_arr[268],
'virtual_aid': bit_arr[269],
'assigned': bit_arr[270],
'name_extension': decode_bin_as_ascii6(bit_arr[272:]),
}
def decode_msg_18(bit_arr: bitarray.bitarray) -> Dict[str, Any]:
"""
Standard Class B CS Position Report
Src: https://gpsd.gitlab.io/gpsd/AIVDM.html#_type_18_standard_class_b_cs_position_report
"""
get_int_from_data = partial(get_int, bit_arr)
return {
'type': get_int_from_data(0, 6),
'repeat': get_int_from_data(8, 8),
'mmsi': get_mmsi(bit_arr, 8, 38),
'speed': get_int_from_data(46, 56) * 0.1,
'accuracy': bit_arr[56],
'lon': get_int_from_data(57, 85, signed=True) / 600000.0,
'lat': get_int_from_data(85, 112, signed=True) / 600000.0,
'course': get_int_from_data(112, 124) * 0.1,
'heading': get_int_from_data(124, 133),
'second': get_int_from_data(133, 139),
'regional': get_int_from_data(139, 141),
'cs': bit_arr[141],
'display': bit_arr[142],
'dsc': bit_arr[143],
'band': bit_arr[144],
'msg22': bit_arr[145],
'assigned': bit_arr[146],
'raim': bit_arr[147],
'radio': get_int_from_data(148, len(bit_arr)),
}
def decode_msg_5(bit_arr: bitarray.bitarray) -> Dict[str, Any]:
"""
Static and Voyage Related Data
Src: https://gpsd.gitlab.io/gpsd/AIVDM.html#_type_5_static_and_voyage_related_data
"""
get_int_from_data = partial(get_int, bit_arr)
return {
'type': get_int_from_data(0, 6),
'repeat': get_int_from_data(6, 8),
'mmsi': get_mmsi(bit_arr, 8, 38),
'ais_version': get_int_from_data(38, 40),
'imo': get_int_from_data(40, 70),
'callsign': decode_bin_as_ascii6(bit_arr[70:112]),
'shipname': decode_bin_as_ascii6(bit_arr[112:232]),
'shiptype': ShipType(get_int_from_data(232, 240)),
'to_bow': get_int_from_data(240, 249),
'to_stern': get_int_from_data(249, 258),
'to_port': get_int_from_data(258, 264),
'to_starboard': get_int_from_data(264, 270),
'epfd': EpfdType(get_int_from_data(270, 274)),
'month': get_int_from_data(274, 278),
'day': get_int_from_data(278, 283),
'hour': get_int_from_data(283, 288),
'minute': get_int_from_data(288, 294),
'draught': get_int_from_data(294, 302) / 10.0,
'destination': decode_bin_as_ascii6(bit_arr[302:422]),
'dte': bit_arr[-2]
}
def decode_msg_6(bit_arr: bitarray.bitarray) -> Dict[str, Any]:
"""
Binary Addresses Message
Src: https://gpsd.gitlab.io/gpsd/AIVDM.html#_type_4_base_station_report
"""
get_int_from_data = partial(get_int, bit_arr)
return {
'type': get_int_from_data(0, 6),
'repeat': get_int_from_data(6, 8),
'mmsi': get_mmsi(bit_arr, 8, 38),
'seqno': get_int_from_data(38, 40),
'dest_mmsi': get_mmsi(bit_arr, 40, 70),
'retransmit': bit_arr[70],
'dac': get_int_from_data(72, 82),
'fid': get_int_from_data(82, 88),
'data': bit_arr[88:].to01()
}
def decode_msg_16(bit_arr: bitarray.bitarray) -> Dict[str, Any]:
"""
Assignment Mode Command
Src: https://gpsd.gitlab.io/gpsd/AIVDM.html#_type_16_assignment_mode_command
"""
get_int_from_data = partial(get_int, bit_arr)
return {
'type': get_int_from_data(0, 6),
'repeat': get_int_from_data(6, 8),
'mmsi': get_mmsi(bit_arr, 8, 38),
'mmsi1': get_mmsi(bit_arr, 40, 70),
'offset1': get_int_from_data(70, 82),
'increment1': get_int_from_data(82, 92),
'mmsi2': get_mmsi(bit_arr, 92, 122),
'offset2': get_int_from_data(122, 134),
'increment2': get_int_from_data(134, 144)
}
def decode_msg_26(bit_arr: bitarray.bitarray) -> Dict[str, Any]:
"""
Multiple Slot Binary Message
Src: https://gpsd.gitlab.io/gpsd/AIVDM.html#_type_26_multiple_slot_binary_message
NOTE: This message type is quite uncommon and
I was not able find any real world occurrence of the type.
Also documentation seems to vary. Use with caution.
"""
get_int_from_data = partial(get_int, bit_arr)
radio_status_offset = len(bit_arr) - 20
data = {
'type': get_int_from_data(0, 6),
'repeat': get_int_from_data(8, 8),
'mmsi': get_mmsi(bit_arr, 8, 38),
'addressed': bit_arr[38],
'structured': bit_arr[39],
'radio': get_int_from_data(radio_status_offset, len(bit_arr))
}
d: Dict[str, Any]
if data['addressed']:
d = {
'dest_mmsi': get_mmsi(bit_arr, 40, 70),
}
data.update(d)
lo_ix = 40 if data['addressed'] else 70
hi_ix = lo_ix + 16
if data['structured']:
d = {
'app_id': get_int_from_data(lo_ix, hi_ix),
'data': bit_arr[hi_ix:radio_status_offset].to01()
}
else:
d = {
'data': bit_arr[lo_ix:radio_status_offset].to01()
}
data.update(d)
return data
def decode_msg_15(bit_arr: bitarray.bitarray) -> Dict[str, Any]:
"""
Interrogation
Src: https://gpsd.gitlab.io/gpsd/AIVDM.html#_type_15_interrogation
"""
get_int_from_data = partial(get_int, bit_arr)
return {
'type': get_int_from_data(0, 6),
'repeat': get_int_from_data(6, 8),
'mmsi': get_mmsi(bit_arr, 8, 38),
'mmsi1': get_mmsi(bit_arr, 40, 70),
'type1_1': get_int_from_data(70, 76),
'offset1_1': get_int_from_data(76, 88),
'type1_2': get_int_from_data(90, 96),
'offset1_2': get_int_from_data(96, 108),
'mmsi2': get_mmsi(bit_arr, 110, 140),
'type2_1': get_int_from_data(140, 146),
'offset2_1': get_int_from_data(146, 157),
}
def decode_msg_7(bit_arr: bitarray.bitarray) -> Dict[str, Any]:
"""
Binary Acknowledge
Src: https://gpsd.gitlab.io/gpsd/AIVDM.html#_type_7_binary_acknowledge
"""
get_int_from_data = partial(get_int, bit_arr)
return {
'type': get_int_from_data(0, 6),
'repeat': get_int_from_data(6, 8),
'mmsi': get_mmsi(bit_arr, 8, 38),
'mmsi1': get_mmsi(bit_arr, 40, 70),
'mmsiseq1': get_int_from_data(70, 72),
'mmsi2': get_mmsi(bit_arr, 72, 102),
'mmsiseq2': get_int_from_data(102, 104),
'mmsi3': get_mmsi(bit_arr, 104, 134),
'mmsiseq3': get_int_from_data(134, 136),
'mmsi4': get_mmsi(bit_arr, 136, 166),
'mmsiseq4': get_int_from_data(166, 168)
}
def decode_msg_14(bit_arr: bitarray.bitarray) -> Dict[str, Any]:
"""
Safety-Related Broadcast Message
Src: https://gpsd.gitlab.io/gpsd/AIVDM.html#_type_14_safety_related_broadcast_message
"""
get_int_from_data = partial(get_int, bit_arr)
return {
'type': get_int_from_data(0, 6),
'repeat': get_int_from_data(6, 8),
'mmsi': get_mmsi(bit_arr, 8, 38),
'text': decode_bin_as_ascii6(bit_arr[40:])
}
def decode_msg_22(bit_arr: bitarray.bitarray) -> Dict[str, Any]:
"""
Channel Management
Src: https://gpsd.gitlab.io/gpsd/AIVDM.html#_type_22_channel_management
"""
get_int_from_data = partial(get_int, bit_arr)
data = {
'type': get_int_from_data(0, 6),
'repeat': get_int_from_data(8, 8),
'mmsi': get_mmsi(bit_arr, 8, 38),
'channel_a': get_int_from_data(40, 52),
'channel_b': get_int_from_data(52, 64),
'txrx': get_int_from_data(64, 68),
'power': bit_arr[68],
'addressed': bit_arr[139],
'band_a': bit_arr[140],
'band_b': bit_arr[141],
'zonesize': get_int_from_data(142, 145),
}
d: Dict[str, Any] = {}
if data['addressed']:
# Addressed
d = {
'dest1': get_mmsi(bit_arr, 69, 99),
'dest2': get_mmsi(bit_arr, 104, 134),
}
else:
# Broadcast
d = {
'ne_lon': get_int_from_data(69, 87, signed=True) * 0.1,
'ne_lat': get_int_from_data(87, 104, signed=True) * 0.1,
'sw_lon': get_int_from_data(104, 122, signed=True) * 0.1,
'sw_lat': get_int_from_data(122, 139, signed=True) * 0.1,
}
data.update(d)
return data
def decode_msg_8(bit_arr: bitarray.bitarray) -> Dict[str, Any]:
"""
Binary Acknowledge
Src: https://gpsd.gitlab.io/gpsd/AIVDM.html#_type_8_binary_broadcast_message
"""
get_int_from_data = partial(get_int, bit_arr)
return {
'type': get_int_from_data(0, 6),
'repeat': get_int_from_data(6, 8),
'mmsi': get_mmsi(bit_arr, 8, 38),
'dac': get_int_from_data(40, 50),
'fid': get_int_from_data(50, 56),
'data': bit_arr[56:].to01()
}
def decode_msg_17(bit_arr: bitarray.bitarray) -> Dict[str, Any]:
"""
DGNSS Broadcast Binary Message
Src: https://gpsd.gitlab.io/gpsd/AIVDM.html#_type_17_dgnss_broadcast_binary_message
"""
get_int_from_data = partial(get_int, bit_arr)
return {
'type': get_int_from_data(0, 6),
'repeat': get_int_from_data(6, 8),
'mmsi': get_mmsi(bit_arr, 8, 38),
'lon': get_int_from_data(40, 58, signed=True),
'lat': get_int_from_data(58, 75, signed=True),
'data': get_int_from_data(80, 816)
}
def decode_msg_27(bit_arr: bitarray.bitarray) -> Dict[str, Any]:
"""
Long Range AIS Broadcast message
Src: https://gpsd.gitlab.io/gpsd/AIVDM.html#_type_27_long_range_ais_broadcast_message
"""
get_int_from_data = partial(get_int, bit_arr)
return {
'type': get_int_from_data(0, 6),
'repeat': get_int_from_data(8, 8),
'mmsi': get_mmsi(bit_arr, 8, 38),
'accuracy': bit_arr[38],
'raim': bit_arr[39],
'status': NavigationStatus(get_int_from_data(40, 44)),
'lon': get_int_from_data(44, 62, signed=True) / 600.0,
'lat': get_int_from_data(62, 79, signed=True) / 600.0,
'speed': get_int_from_data(79, 85),
'course': get_int_from_data(85, 94),
'gnss': bit_arr[94],
}
def decode_msg_23(bit_arr: bitarray.bitarray) -> Dict[str, Any]:
"""
Group Assignment Command
Src: https://gpsd.gitlab.io/gpsd/AIVDM.html#_type_23_group_assignment_command
"""
get_int_from_data = partial(get_int, bit_arr)
return {
'type': get_int_from_data(0, 6),
'repeat': get_int_from_data(8, 8),
'mmsi': get_mmsi(bit_arr, 8, 38),
'ne_lon': get_int_from_data(40, 58, signed=True) * 0.1,
'ne_lat': get_int_from_data(58, 75, signed=True) * 0.1,
'sw_lon': get_int_from_data(75, 93, signed=True) * 0.1,
'sw_lat': get_int_from_data(93, 110, signed=True) * 0.1,
'station_type': StationType(get_int_from_data(110, 114)),
'ship_type': ShipType(get_int_from_data(114, 122)),
'txrx': TransmitMode(get_int_from_data(144, 146)),
'interval': StationIntervals(get_int_from_data(146, 150)),
'quiet': get_int_from_data(150, 154),
}
def decode_msg_9(bit_arr: bitarray.bitarray) -> Dict[str, Any]:
"""
Standard SAR Aircraft Position Report
Src: https://gpsd.gitlab.io/gpsd/AIVDM.html#_type_9_standard_sar_aircraft_position_report
"""
get_int_from_data = partial(get_int, bit_arr)
return {
'type': get_int_from_data(0, 6),
'repeat': get_int_from_data(6, 8),
'mmsi': get_mmsi(bit_arr, 8, 38),
'alt': get_int_from_data(38, 50),
'speed': get_int_from_data(50, 60),
'accuracy': bit_arr[60],
'lon': get_int_from_data(61, 89, signed=True) / 600000.0,
'lat': get_int_from_data(89, 116, signed=True) / 600000.0,
'course': get_int_from_data(116, 128) * 0.1,
'second': get_int_from_data(128, 134),
'dte': bit_arr[142],
'assigned': bit_arr[146],
'raim': bit_arr[147],
'radio': get_int_from_data(148, 168)
}
def decode_msg_4(bit_arr: bitarray.bitarray) -> Dict[str, Any]:
"""
AIS Vessel position report using SOTDMA (Self-Organizing Time Division Multiple Access)
Src: https://gpsd.gitlab.io/gpsd/AIVDM.html#_type_4_base_station_report
"""
get_int_from_data = partial(get_int, bit_arr)
return {
'type': get_int_from_data(0, 6),
'repeat': get_int_from_data(6, 8),
'mmsi': get_mmsi(bit_arr, 8, 38),
'year': get_int_from_data(38, 52),
'month': get_int_from_data(52, 56),
'day': get_int_from_data(56, 61),
'hour': get_int_from_data(61, 66),
'minute': get_int_from_data(66, 72),
'second': get_int_from_data(72, 78),
'accuracy': bit_arr[78],
'lon': get_int_from_data(79, 107, signed=True) / 600000.0,
'lat': get_int_from_data(107, 134, signed=True) / 600000.0,
'epfd': EpfdType(get_int_from_data(134, 138)),
'raim': bit_arr[148],
'radio': get_int_from_data(148, len(bit_arr)),
}
def decode_msg_1(bit_arr: bitarray.bitarray) -> Dict[str, Any]:
"""
AIS Vessel position report using SOTDMA (Self-Organizing Time Division Multiple Access)
Src: https://gpsd.gitlab.io/gpsd/AIVDM.html#_types_1_2_and_3_position_report_class_a
"""
get_int_from_data = partial(get_int, bit_arr)
return {
'type': get_int_from_data(0, 6),
'repeat': get_int_from_data(6, 8),
'mmsi': get_mmsi(bit_arr, 8, 38),
'status': NavigationStatus(get_int_from_data(38, 42)),
'turn': get_int_from_data(42, 50, signed=True),
'speed': get_int_from_data(50, 60) / 10.0,
'accuracy': bit_arr[60],
'lon': get_int_from_data(61, 89, signed=True) / 600000.0,
'lat': get_int_from_data(89, 116, signed=True) / 600000.0,
'course': get_int_from_data(116, 128) * 0.1,
'heading': get_int_from_data(128, 137),
'second': get_int_from_data(137, 143),
'maneuver': ManeuverIndicator(get_int_from_data(143, 145)),
'raim': bit_arr[148],
'radio': get_int_from_data(149, len(bit_arr)),
}