Tools and routines for {maritime} data.
- High-performance AIS decoding routines.
- built on Kurt Schwehr’s libais
- Seavision API wrapper
- ?
You’ll need a C++ compiler. If you’re using Windows, that means Rtools.
if (!requireNamespace("remotes", quietly = TRUE)) install.packages("remotes")
remotes::install_github("knapply/maritime")library(maritime)- Automatic sentence validation and line normalization
- Message Types:
-
ais_msgs$msg_1_2_3 -
ais_msgs$msg_4_11 -
ais_msgs$msg_5 -
ais_msgs$msg_6 -
ais_msgs$msg_7_13 -
ais_msgs$msg_8 -
ais_msgs$msg_9 -
ais_msgs$msg_10 -
ais_msgs$msg_11 -
ais_msgs$msg_12 -
ais_msgs$msg_14 -
ais_msgs$msg_15 -
ais_msgs$msg_16 -
ais_msgs$msg_17 -
ais_msgs$msg_18 -
ais_msgs$msg_19 -
ais_msgs$msg_20 -
ais_msgs$msg_21 -
ais_msgs$msg_22 -
ais_msgs$msg_23 -
ais_msgs$msg_24 -
ais_msgs$msg_25 -
ais_msgs$msg_26 -
ais_msgs$msg_27
-
nmea_file <- "inst/example-data/big-files/20200131.log"
paste(round(file.size(nmea_file) / 1e9, 2L), "GB")#> [1] "1.38 GB"
readLines(nmea_file, n = 20) # real world data, in all its terrible glory#> [1] ",1580428800"
#> [2] ",1580428800"
#> [3] "!AIVDM,1,1,,B,33P9gc5000OiLfLP2CuP3TUU0P00,0*0E,1580428800,1580428800"
#> [4] "!AIVDM,1,1,,A,33P>Erm000OTjJtOtb`jMlen1lg:,0*14,1580428800,1580428800"
#> [5] "!AIVDM,2,1,5,A,53FDrl02<u;pD4th000p5E@TiE<000000000001J38i6:7?40;j5C300,0*6F,1580428800"
#> [6] "!AIVDM,2,2,5,A,000000000000000,2*21,1580428800,1580428800"
#> [7] "!AIVDM,1,1,,B,33n>C@1002OnlS`PfbRM4WOnP000,0*62,1580428800,1580428800"
#> [8] "!AIVDM,2,1,3,A,55Thhp82DVT;<Hi?F20p5HTu>1=0PE8622222216H@R;I4K?>SQT`12j,0*18,1580428800"
#> [9] "!AIVDM,2,2,3,A,p88888888888880,2*6F,1580428800,1580428800"
#> [10] "!AIVDM,1,1,,B,13@2I6001RPCas8MdPqD1k?n0DB7,0*36,1580428800,1580428800"
#> [11] "!AIVDM,1,1,,A,13gTve0P00ve;htUUf7>4?v02L0U,0*69,1580428801,1580428800"
#> [12] "!AIVDM,1,1,,A,B3h;a2P00?U7kkaK7JVNKwP5oP06,0*75,1580428801,1580428800"
#> [13] "!AIVDM,1,1,,A,H3h;0kQ<DTME:0TT00000000000,2*18,1580428801,1580428800"
#> [14] "!AIVDM,1,1,,A,1Cgda=g001Nc<MhUguL@`@L00400,0*7A,1580428801,1580428800"
#> [15] "!AIVDM,2,1,9,B,53gkbKT00001@HHt000d4H58V20000000000000R18923t00d0P0000@,0*4F,1580428801"
#> [16] "!AIVDM,2,2,9,B,00P0000p0000000,2*0E,1580428801,1580428800"
#> [17] "!BSVDM,1,1,,B,B3m?0t000HMaR>::Mufa7wuUoP06,0*05,1580428801,1580428800"
#> [18] "!BSVDM,2,1,5,A,53m`ni026Hl8h4l:220dDU0pE>2222222222220N0PA254B00<fNM<ev<v88,0*4B,1580428801"
#> [19] "!BSVDM,2,2,5,A,88888888880,2*38,1580428801,1580428800"
#> [20] "!BSVDM,2,1,3,B,53o=mb02?7A8aLhR221<eDh858Dr22222222220N3H;4440Ht?1RDj2CQp0j,0*0A,1580428801"
ais_decode_filter(msgs = nmea_file, msg_type = ais_msgs$msg_1_2_3)#> # A tibble: 5,542,768 x 29
#> time first_line_numb… message_id repeat_indicator mmsi nav_status rot_over_range rot sog position_accura… lng_deg lat_deg
#> <dttm> <int> <int> <int> <int> <int> <lgl> <dbl> <dbl> <int> <dbl> <dbl>
#> 1 2020-01-31 00:00:00 3 3 0 2.35e8 5 FALSE 0 0 0 -3.18 56.0
#> 2 2020-01-31 00:00:00 4 3 0 2.35e8 5 FALSE 0 0 0 -5.94 55.8
#> 3 2020-01-31 00:00:00 7 3 0 2.58e8 1 FALSE 0 0.200 0 -2.01 57.2
#> 4 2020-01-31 00:00:00 10 1 0 2.18e8 0 FALSE 0 9.80 1 4.29 51.9
#> 5 2020-01-31 00:00:01 11 1 0 2.51e8 0 TRUE -731. 0 1 -18.1 65.7
#> 6 2020-01-31 00:00:01 14 1 1 2.51e8 15 FALSE 0 0.100 0 -18.5 66.0
#> 7 2020-01-31 00:00:01 24 1 0 2.74e8 5 TRUE -731. 0.100 0 18.9 69.6
#> 8 2020-01-31 00:00:01 25 3 0 2.57e8 5 FALSE -35.0 0.100 0 24.7 71.0
#> 9 2020-01-31 00:00:01 27 1 0 2.57e8 0 TRUE -731. 0 0 12.6 66.0
#> 10 2020-01-31 00:00:01 33 1 0 2.57e8 0 TRUE -731. 0 0 8.65 63.8
#> # … with 5,542,758 more rows, and 17 more variables: cog <dbl>, true_heading <int>, timestamp <int>, special_manoeuvre <int>, spare <int>,
#> # raim <lgl>, sync_state <int>, slot_timeout <int>, received_stations <int>, slot_number <int>, utc_hour <int>, utc_min <int>, utc_spare <int>,
#> # slot_offset <int>, slot_increment <int>, slots_to_allocate <int>, keep_flag <lgl>
ais_decode_df(msgs = nmea_file)#> # A tibble: 14,817,325 x 71
#> time first_line_numb… message_id repeat_indicator mmsi nav_status rot_over_range rot sog position_accura… lng_deg lat_deg
#> <dttm> <int> <int> <int> <int> <int> <lgl> <dbl> <dbl> <int> <dbl> <dbl>
#> 1 2020-01-31 00:00:00 3 3 0 2.35e8 5 FALSE 0 0 0 -3.18 56.0
#> 2 2020-01-31 00:00:00 4 3 0 2.35e8 5 FALSE 0 0 0 -5.94 55.8
#> 3 2020-01-31 00:00:00 5 5 0 2.25e8 NA NA NA NA NA NA NA
#> 4 2020-01-31 00:00:00 7 3 0 2.58e8 1 FALSE 0 0.200 0 -2.01 57.2
#> 5 2020-01-31 00:00:00 8 5 0 3.74e8 NA NA NA NA NA NA NA
#> 6 2020-01-31 00:00:00 10 1 0 2.18e8 0 FALSE 0 9.80 1 4.29 51.9
#> 7 2020-01-31 00:00:01 11 1 0 2.51e8 0 TRUE -731. 0 1 -18.1 65.7
#> 8 2020-01-31 00:00:01 12 18 0 2.52e8 NA NA NA 0 1 -23.5 65.9
#> 9 2020-01-31 00:00:01 13 24 0 2.52e8 NA NA NA NA NA NA NA
#> 10 2020-01-31 00:00:01 14 1 1 2.51e8 15 FALSE 0 0.100 0 -18.5 66.0
#> # … with 14,817,315 more rows, and 59 more variables: cog <dbl>, true_heading <int>, timestamp <int>, special_manoeuvre <int>, spare <int>,
#> # raim <lgl>, sync_state <int>, slot_timeout <int>, received_stations <int>, slot_number <int>, utc_hour <int>, utc_min <int>, utc_spare <int>,
#> # slot_offset <int>, slot_increment <int>, slots_to_allocate <int>, keep_flag <int>, year <int>, month <int>, day <int>, hour <int>, minute <int>,
#> # second <int>, fix_type <int>, transmission_ctl <int>, ais_version <int>, imo_num <int>, callsign <chr>, name <chr>, type_and_cargo <int>,
#> # dim_a <int>, dim_b <int>, dim_c <int>, dim_d <int>, eta_month <int>, eta_day <int>, eta_hour <int>, eta_minute <int>, draught <dbl>,
#> # destination <chr>, dte <int>, alt <int>, alt_sensor <int>, spare2 <int>, assigned_mode <int>, seq_num <int>, dest_mmsi <int>,
#> # retransmitted <lgl>, text <chr>, unit_flag <int>, display_flag <int>, dsc_flag <int>, band_flag <int>, m22_flag <int>, mode_flag <int>,
#> # commstate_flag <int>, commstate_cs_fill <int>, spare3 <int>, vendor_id <chr>
bench::mark(
`ais_decode_list()` = decoded_list <- ais_decode_list(
nmea_file, as_tibble = FALSE, as_sf = FALSE, verbose = FALSE
)
)#> # A tibble: 1 x 6
#> expression min median `itr/sec` mem_alloc `gc/sec`
#> <bch:expr> <bch:tm> <bch:tm> <dbl> <bch:byt> <dbl>
#> 1 ais_decode_list() 17.7s 17.7s 0.0564 4.76GB 0.0564
lapply(decoded_list, tibble::as_tibble)#> $msgs_1_2_3
#> # A tibble: 5,542,768 x 29
#> time first_line_numb… message_id repeat_indicator mmsi nav_status rot_over_range rot sog position_accura… lng_deg lat_deg
#> <dttm> <int> <int> <int> <int> <int> <lgl> <dbl> <dbl> <int> <dbl> <dbl>
#> 1 2020-01-31 00:00:00 3 3 0 2.35e8 5 FALSE 0 0 0 -3.18 56.0
#> 2 2020-01-31 00:00:00 4 3 0 2.35e8 5 FALSE 0 0 0 -5.94 55.8
#> 3 2020-01-31 00:00:00 7 3 0 2.58e8 1 FALSE 0 0.200 0 -2.01 57.2
#> 4 2020-01-31 00:00:00 10 1 0 2.18e8 0 FALSE 0 9.80 1 4.29 51.9
#> 5 2020-01-31 00:00:01 11 1 0 2.51e8 0 TRUE -731. 0 1 -18.1 65.7
#> 6 2020-01-31 00:00:01 14 1 1 2.51e8 15 FALSE 0 0.100 0 -18.5 66.0
#> 7 2020-01-31 00:00:01 24 1 0 2.74e8 5 TRUE -731. 0.100 0 18.9 69.6
#> 8 2020-01-31 00:00:01 25 3 0 2.57e8 5 FALSE -35.0 0.100 0 24.7 71.0
#> 9 2020-01-31 00:00:01 27 1 0 2.57e8 0 TRUE -731. 0 0 12.6 66.0
#> 10 2020-01-31 00:00:01 33 1 0 2.57e8 0 TRUE -731. 0 0 8.65 63.8
#> # … with 5,542,758 more rows, and 17 more variables: cog <dbl>, true_heading <int>, timestamp <int>, special_manoeuvre <int>, spare <int>,
#> # raim <lgl>, sync_state <int>, slot_timeout <int>, received_stations <int>, slot_number <int>, utc_hour <int>, utc_min <int>, utc_spare <int>,
#> # slot_offset <int>, slot_increment <int>, slots_to_allocate <int>, keep_flag <lgl>
#>
#> $msgs_4_11
#> # A tibble: 187,845 x 26
#> time first_line_numb… message_id repeat_indicator mmsi year month day hour minute second position_accura… lng_deg lat_deg
#> <dttm> <int> <int> <int> <int> <int> <int> <int> <int> <int> <int> <int> <dbl> <dbl>
#> 1 2020-01-31 00:00:01 130 4 0 2.73e6 2020 1 31 0 0 0 0 27.0 60.0
#> 2 2020-01-31 00:00:01 134 4 1 2.66e6 2020 1 31 0 0 0 0 18.2 59.3
#> 3 2020-01-31 00:00:01 136 4 1 2.77e6 2020 1 31 0 0 0 1 27.4 59.4
#> 4 2020-01-31 00:00:01 137 4 1 2.73e6 2020 1 31 0 0 1 0 28.7 60.3
#> 5 2020-01-31 00:00:01 181 4 0 3.16e6 2020 1 31 0 0 0 1 -81.7 44.1
#> 6 2020-01-31 00:00:01 183 4 0 3.16e6 2020 1 31 0 0 0 1 -76.7 44.3
#> 7 2020-01-31 00:00:01 188 4 0 3.67e6 2020 1 31 0 0 0 1 -89.8 29.6
#> 8 2020-01-31 00:00:01 203 4 0 3.67e6 2020 1 31 0 0 0 1 -85.3 29.8
#> 9 2020-01-31 00:00:02 317 4 0 3.67e6 2020 1 31 0 0 0 1 -124. 41.1
#> 10 2020-01-31 00:00:03 520 4 0 3.67e6 2020 1 31 0 0 2 1 -122. 45.7
#> # … with 187,835 more rows, and 12 more variables: fix_type <int>, transmission_ctl <int>, spare <int>, raim <lgl>, sync_state <int>,
#> # slot_timeout <int>, received_stations <int>, slot_number <int>, utc_hour <int>, utc_min <int>, utc_spare <int>, slot_offset <int>
#>
#> $msgs_5
#> # A tibble: 4,177,583 x 23
#> time first_line_numb… message_id repeat_indicator mmsi ais_version imo_num callsign name type_and_cargo dim_a dim_b dim_c dim_d
#> <dttm> <int> <int> <int> <int> <int> <int> <chr> <chr> <int> <int> <int> <int> <int>
#> 1 2020-01-31 00:00:00 5 5 0 2.25e8 0 9237694 EAOL@@@ NAUT… 90 25 49 6 10
#> 2 2020-01-31 00:00:00 8 5 0 3.74e8 2 9738818 3FLS5 NAVI… 70 194 34 11 25
#> 3 2020-01-31 00:00:01 15 5 0 2.51e8 1 0 TFFO@@@ KAFA… 34 9 9 2 3
#> 4 2020-01-31 00:00:01 18 5 0 2.58e8 0 8807234 LAMB KEIP… 30 4 17 2 5
#> 5 2020-01-31 00:00:01 20 5 0 2.59e8 0 9379090 JWLH SKUL… 30 27 11 4 4
#> 6 2020-01-31 00:00:01 22 5 0 2.58e8 0 9237981 LLKV HIDR… 60 25 25 7 7
#> 7 2020-01-31 00:00:01 29 5 0 2.57e8 0 0 LK5895 ISBJ… 30 4 7 2 2
#> 8 2020-01-31 00:00:01 31 5 0 2.57e8 2 0 LM6281@ HILM… 30 2 8 1 3
#> 9 2020-01-31 00:00:01 44 5 0 2.50e8 0 9327712 EITN RONA 30 0 0 0 0
#> 10 2020-01-31 00:00:02 47 5 0 3.12e8 1 0 V3OM6@@ JOAN… 99 35 45 7 5
#> # … with 4,177,573 more rows, and 9 more variables: fix_type <int>, eta_month <int>, eta_day <int>, eta_hour <int>, eta_minute <int>, draught <dbl>,
#> # destination <chr>, dte <int>, spare <int>
#>
#> $msgs_7_13
#> # A tibble: 0 x 0
#>
#> $msgs_9
#> # A tibble: 1,412 x 29
#> time first_line_numb… message_id repeat_indicator mmsi alt sog position_accura… lng_deg lat_deg cog timestamp alt_sensor
#> <dttm> <int> <int> <int> <int> <int> <int> <int> <dbl> <dbl> <int> <int> <int>
#> 1 2020-01-31 00:09:12 121025 9 0 1.11e8 73 0 0 -15.4 28.2 330 44 0
#> 2 2020-01-31 00:14:14 187566 9 0 1.11e8 237 78 0 -15.5 28.2 278 45 0
#> 3 2020-01-31 00:19:17 254727 9 0 1.11e8 103 43 0 -15.4 28.2 11 45 0
#> 4 2020-01-31 00:24:30 322875 9 0 1.11e8 70 2 0 -15.4 28.2 348 56 0
#> 5 2020-01-31 00:34:43 457540 9 0 1.11e8 76 0 0 -15.4 28.2 0 4 0
#> 6 2020-01-31 00:39:45 523440 9 0 1.11e8 326 81 0 -15.5 28.2 45 4 0
#> 7 2020-01-31 00:44:56 591595 9 0 1.11e8 526 122 0 -15.4 28.1 182 15 0
#> 8 2020-01-31 01:57:43 1548581 9 0 1.11e8 619 105 1 128. 35.0 170 39 0
#> 9 2020-01-31 02:03:33 1625095 9 0 1.11e8 941 106 1 128. 34.8 167 29 0
#> 10 2020-01-31 02:08:43 1692764 9 0 1.11e8 1498 99 1 128. 34.7 249 39 0
#> # … with 1,402 more rows, and 16 more variables: spare <int>, dte <int>, spare2 <int>, assigned_mode <int>, raim <lgl>, sync_state <int>,
#> # slot_timeout <int>, received_stations <int>, slot_number <int>, utc_hour <int>, utc_min <int>, utc_spare <int>, slot_offset <int>,
#> # slot_increment <int>, slots_to_allocate <int>, keep_flag <lgl>
#>
#> $msgs_10
#> # A tibble: 0 x 0
#>
#> $msgs_12
#> # A tibble: 369 x 10
#> time first_line_number message_id repeat_indicator mmsi seq_num dest_mmsi retransmitted spare text
#> <dttm> <int> <int> <int> <int> <int> <int> <lgl> <int> <chr>
#> 1 2020-01-31 00:11:08 146585 12 1 2.24e6 0 215375000 FALSE 0 ANCHORAGE AND DRIFTING ARE NOT ALL…
#> 2 2020-01-31 00:11:10 147170 12 1 2.24e6 0 215375000 FALSE 0 ANCHORAGE AND DRIFTING ARE NOT ALL…
#> 3 2020-01-31 00:18:25 242526 12 0 2.35e8 0 563083300 FALSE 0 SIR ANY UPDATE ABOUT UR ETB?
#> 4 2020-01-31 00:18:27 243124 12 0 2.35e8 0 563083300 FALSE 0 SIR ANY UPDATE ABOUT UR ETB?
#> 5 2020-01-31 00:31:11 411238 12 0 5.63e8 3 205602000 FALSE 0 DOOG EVENING,SIR , DISCH PORT CHIN…
#> 6 2020-01-31 00:31:14 412141 12 0 5.63e8 3 205602000 FALSE 0 DOOG EVENING,SIR , DISCH PORT CHIN…
#> 7 2020-01-31 00:36:02 474763 12 0 6.36e8 1 248659000 FALSE 0 AIS TEST PLS ACK GOOD WATCH MSC MI…
#> 8 2020-01-31 00:36:03 475012 12 0 6.36e8 1 248659000 FALSE 0 AIS TEST PLS ACK GOOD WATCH MSC MI…
#> 9 2020-01-31 00:36:04 475276 12 0 6.36e8 1 248659000 FALSE 0 AIS TEST PLS ACK GOOD WATCH MSC MI…
#> 10 2020-01-31 00:36:32 480994 12 0 6.36e8 2 241008000 FALSE 0 AIS TEST PLS ACK GOOD WATCH MSC MI…
#> # … with 359 more rows
#>
#> $msgs_14
#> # A tibble: 99 x 8
#> time first_line_number message_id repeat_indicator mmsi spare text spare2
#> <dttm> <int> <int> <int> <int> <int> <chr> <int>
#> 1 2020-01-31 00:15:43 206734 14 0 970226163 0 SART ACTIVE@@@@@ 0
#> 2 2020-01-31 01:05:13 858311 14 0 255805824 0 AIS TEST PLS ACK BQ 0
#> 3 2020-01-31 01:05:14 858572 14 0 255805824 0 AIS TEST PLS ACK BQ 0
#> 4 2020-01-31 01:59:44 1574937 14 0 970226163 0 SART ACTIVE@@@@@ 0
#> 5 2020-01-31 01:59:47 1575615 14 0 970226163 0 SART ACTIVE@@@@@ 0
#> 6 2020-01-31 02:03:44 1627493 14 0 970226163 0 SART ACTIVE@@@@@ 0
#> 7 2020-01-31 02:15:44 1784003 14 0 970226163 0 SART ACTIVE@@@@@ 0
#> 8 2020-01-31 02:33:18 2015329 14 0 636018898 0 PLEASE ACKN SEND 0
#> 9 2020-01-31 02:33:19 2015540 14 0 636018898 0 PLEASE ACKN SEND 0
#> 10 2020-01-31 02:43:42 2151333 14 0 970226163 0 SART ACTIVE@@@@@ 0
#> # … with 89 more rows
#>
#> $msgs_15
#> # A tibble: 0 x 0
#>
#> $msgs_16
#> # A tibble: 0 x 0
#>
#> $msgs_17
#> # A tibble: 0 x 0
#>
#> $msgs_18
#> # A tibble: 1,815,577 x 33
#> time first_line_numb… message_id repeat_indicator mmsi spare sog position_accura… lng_deg lat_deg cog true_heading timestamp
#> <dttm> <int> <int> <int> <int> <int> <dbl> <int> <dbl> <dbl> <dbl> <int> <int>
#> 1 2020-01-31 00:00:01 12 18 0 2.52e8 0 0 1 -23.5 65.9 253. 511 0
#> 2 2020-01-31 00:00:01 17 18 0 2.57e8 0 0.100 1 25.9 71.0 270. 511 59
#> 3 2020-01-31 00:00:01 40 18 0 2.57e8 0 5.5 0 16.2 69.3 318. 511 0
#> 4 2020-01-31 00:00:02 54 18 0 2.61e8 0 0 1 16.9 54.6 240. 511 1
#> 5 2020-01-31 00:00:02 80 18 0 2.19e8 0 0 1 10.1 55.6 360 511 1
#> 6 2020-01-31 00:00:01 118 18 0 3.78e8 0 0 1 14.5 35.9 241. 511 59
#> 7 2020-01-31 00:00:01 119 18 0 2.24e8 0 0 1 -0.315 39.5 101. 511 21
#> 8 2020-01-31 00:00:01 140 18 0 2.45e8 0 0 1 -6.28 36.5 360 511 0
#> 9 2020-01-31 00:00:01 167 18 0 3.38e8 0 0.100 1 -118. 33.7 316. 511 59
#> 10 2020-01-31 00:00:01 170 18 0 3.38e8 0 0 0 -122. 38.1 26.2 511 59
#> # … with 1,815,567 more rows, and 20 more variables: spare2 <int>, unit_flag <int>, display_flag <int>, dsc_flag <int>, band_flag <int>,
#> # m22_flag <int>, mode_flag <int>, raim <lgl>, commstate_flag <int>, slot_timeout <int>, slot_offset <int>, utc_hour <int>, utc_min <int>,
#> # utc_spare <int>, slot_number <int>, received_stations <int>, slot_increment <int>, slots_to_allocate <int>, keep_flag <int>,
#> # commstate_cs_fill <int>
#>
#> $msgs_19
#> # A tibble: 9,415 x 25
#> time first_line_numb… message_id repeat_indicator mmsi spare sog position_accura… lng_deg lat_deg cog true_heading timestamp
#> <dttm> <int> <int> <int> <int> <int> <dbl> <int> <dbl> <dbl> <dbl> <int> <int>
#> 1 2020-01-31 00:00:14 2924 19 0 5.14e8 0 0.300 1 103. 10.9 360. 511 11
#> 2 2020-01-31 00:00:14 2933 19 0 5.67e8 0 1.70 1 102. 12.2 6 6 60
#> 3 2020-01-31 00:00:22 4691 19 0 5.67e8 0 4.70 1 102. 12.1 80.3 511 20
#> 4 2020-01-31 00:00:24 5126 19 0 9.41e8 0 1 1 14.7 69.1 350. 511 60
#> 5 2020-01-31 00:00:27 5574 19 0 2.19e8 0 0 0 10.7 54.8 171. 171 0
#> 6 2020-01-31 00:01:01 13366 19 0 9.42e8 0 0.900 1 29.7 70.6 360 511 60
#> 7 2020-01-31 00:01:04 14295 19 0 9.41e8 0 0.700 1 13.2 67.9 218. 511 60
#> 8 2020-01-31 00:01:11 15810 19 0 2.58e8 0 0 0 8.00 58.1 249. 248 0
#> 9 2020-01-31 00:01:14 16467 19 0 9.41e8 0 0.400 1 19.7 70.4 266. 511 60
#> 10 2020-01-31 00:01:16 17009 19 0 2.58e8 0 0 1 5.23 59.4 0 0 60
#> # … with 9,405 more rows, and 12 more variables: spare2 <int>, name <chr>, type_and_cargo <int>, dim_a <int>, dim_b <int>, dim_c <int>, dim_d <int>,
#> # fix_type <int>, raim <lgl>, dte <int>, assigned_mode <int>, spare3 <int>
#>
#> $msgs_20
#> # A tibble: 0 x 0
#>
#> $msgs_21
#> # A tibble: 0 x 0
#>
#> $msgs_22
#> # A tibble: 0 x 0
#>
#> $msgs_23
#> # A tibble: 0 x 0
#>
#> $msgs_24
#> # A tibble: 3,082,257 x 14
#> time first_line_number message_id repeat_indicator mmsi name type_and_cargo vendor_id callsign dim_a dim_b dim_c dim_d spare
#> <dttm> <int> <int> <int> <int> <chr> <int> <chr> <chr> <int> <int> <int> <int> <int>
#> 1 2020-01-31 00:00:01 13 24 0 2.52e8 SEIGUR I… NA <NA> <NA> NA NA NA NA NA
#> 2 2020-01-31 00:00:01 26 24 0 2.58e8 BANGSUND… NA <NA> <NA> NA NA NA NA NA
#> 3 2020-01-31 00:00:01 28 24 0 2.57e8 EMIL@@@@… NA <NA> <NA> NA NA NA NA NA
#> 4 2020-01-31 00:00:01 34 24 0 2.57e8 <NA> 30 SRTEC&* LF4079@ 3 7 2 2 0
#> 5 2020-01-31 00:00:01 38 24 0 2.58e8 <NA> 52 @@@@@@@ LCXV@@@ 10 15 3 3 0
#> 6 2020-01-31 00:00:01 39 24 0 2.57e8 TRISTEIN… NA <NA> <NA> NA NA NA NA NA
#> 7 2020-01-31 00:00:01 41 24 0 2.57e8 <NA> 30 SMTFW19 LD2557@ 2 8 1 1 0
#> 8 2020-01-31 00:00:01 42 24 0 2.57e8 <NA> 30 @@@@@@@ LM9428@ 3 7 1 2 0
#> 9 2020-01-31 00:00:02 50 24 0 2.64e8 <NA> 37 SMTD/MY CRA7692 5 3 1 2 0
#> 10 2020-01-31 00:00:02 56 24 0 2.61e8 <NA> 37 SMTF`&L SPS2540 17 10 4 2 0
#> # … with 3,082,247 more rows
#>
#> $msgs_25
#> # A tibble: 0 x 0
#>
#> $msgs_26
#> # A tibble: 0 x 0
#>
#> $msgs_27
#> # A tibble: 0 x 0
- AIS decoding routines are built on top of Kurt Schwehr’s libais.