def decode_msg_24(bit_arr: bitarray) -> dict:
"""
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_int_from_data(8, 38),
'partno': get_int_from_data(38, 40)
}
# Part A
if len(bit_arr) == 160:
d = {
'shipname': encode_bin_as_ascii6(bit_arr[40: 160])
}
# Part B
else:
d = {
'shiptype': ShipType(get_int_from_data(40, 48)),
'vendorid': encode_bin_as_ascii6(bit_arr[48: 66]),
'model': get_int_from_data(66, 70),
'serial': get_int_from_data(70, 90),
'callsign': encode_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_int_from_data(132, 162)
}
data.update(d)
return data
def decode_msg_21(bit_arr: bitarray) -> dict:
"""
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_int_from_data(8, 38),
'aid_type': NavAid(get_int_from_data(38, 43)),
'name': encode_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': encode_bin_as_ascii6(bit_arr[272:]),
}
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_int_from_data(8, 38),
'ais_version': get_int_from_data(38, 40),
'imo': get_int_from_data(40, 70),
'callsign': encode_bin_as_ascii6(bit_arr[70:112]),
'shipname': encode_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': encode_bin_as_ascii6(bit_arr[302:422]),
'dte': bit_arr[-2]
}
def decode_msg_19(bit_arr: bitarray) -> dict:
"""
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_int_from_data(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': encode_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_14(bit_arr: bitarray) -> dict:
"""
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_int_from_data(8, 38),
'text': encode_bin_as_ascii6(bit_arr[40:])
}
def decode_msg_5(bit_arr: bitarray) -> dict:
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_int_from_data(8, 38),
'ais_version': get_int_from_data(38, 40),
'imo': get_int_from_data(40, 70),
'callsign': encode_bin_as_ascii6(bit_arr[70:112]),
'shipname': encode_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': encode_bin_as_ascii6(bit_arr[302:422]),
'dte': bit_arr[-2]
}
def decode_msg_12(bit_arr: bitarray) -> dict:
"""
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_int_from_data(8, 38),
'seqno': get_int_from_data(38, 40),
'dest_mmsi': get_int_from_data(40, 70),
'retransmit': bit_arr[70],
'text': encode_bin_as_ascii6(bit_arr[72:])
}
