jvde-github/AIS-catcher v0.69 on GitHub

v0.69

The JSON output has been aligned with the 2026 ITU-R M.1371-6 spec.

Message type 28 (single-slot AtoN report, M.1371-6 §A7-3.26) is now expanded into structured JSON fields. See the type 28 reference.
Messages 25 and 26: the addressed/broadcast envelope is now exposed in JSON; when the payload carries a recognised (dac, fid) pair the same ASM fields are emitted as for messages 6 and 8.
Spec field renames in messages 1/2/3, 4/11, 9, 18, 19, 21: bits previously labelled regional/reserved are now exposed under their M.1371-6 names (power, transmission_control, alt_sensor, aton_status, …). See the JSON reference for the per-message field list.
Type 23: ship_type is renamed to shiptype and now includes a shiptype_text description, matching the convention used elsewhere.
New ASM decoder for DAC 366, FID 10 (IALA AtoN monitor; messages 6/8/26).

A range of widely deployed Application-Specific Messages is now expanded into structured JSON fields:

IMO Circ.289 (DAC 1) — FID 17 (VTS-generated targets), FID 19 (marine traffic signal), FID 20 (berthing data / port operations), FID 22 (area notice, broadcast), FID 23 (area notice, addressed), FID 24 (extended ship static), FID 25 (dangerous cargo / IMDG), FID 28 (route addressed), FID 32 (tidal window).
Inland AIS — CCNR VTT 1.2 (DAC 200) — FID 21 (ETA at lock/bridge/terminal), FID 22 (RTA at lock/bridge/terminal), FID 23 (EMMA safety warning), FID 24 (water level gauges, up to four stations), FID 40 (signal station status).
Sweden STM (DAC 265, FID 1) — Sea Traffic Management route messages, with full waypoint reconstruction from the delta-encoded leg chain.
Flag-state text telegrams — DAC 210 (Cyprus), 248 (Malta), 353 (Liberia) FID 0 now decode as text.

Inland ENI (European vessel ID number) is now part of ship static data, shown in the ship card and available as an optional sortable column in the ship table.
Inland-specific FIDs (10/55) and the blue sign indicator are surfaced on the map and ship card.
Ship-type details are now reachable from a click popover with the full ITU description, and ERI / inland ship-type tables are complete and labelled correctly.

Box select on the map — drag a rectangle to show tracks for every vessel inside the area at once.
Reset tracks from now map action — clear historical track points and start fresh from the current time without dropping the vessels themselves.
GPS-derived station position is marked with a blue border and a tooltip so it is visually distinguishable from configured fixed positions.
Type 24B transponder details (vendor, model, serial) are now surfaced in the ship card's tech details.
Text telegrams (safety / broadcast text messages) are now displayed in the web viewer.

The community ship overlay has been replaced by a popup pane connected to aiscatcher.org/livemap with two-way view synchronisation (map pan/zoom is shared) and local-vessel push.
The community-feed icon now indicates sharing state at a glance: red = off, orange = anonymous, green = sharing with UUID.

Per-route CORS allow-origin flag, enabled by default on the JSON, GeoJSON, KML, and metrics endpoints so dashboards and external consumers can fetch directly from a browser. CSP also now allows http/ws schemes so LAN deployments work without a custom policy.

Lossless mode for file and TCP inputs. -ga LOSSLESS on/off (FileRAW) and -gt LOSSLESS on/off (RTLTCP) control whether the input blocks or drops samples on overflow. Defaults preserve current behaviour: file replay is lossless (block), live TCP is lossy (drop). The current setting is shown in -v output.
Simpler inline settings for input flags. -t, -r, -x, -z, -i, -w, and -e now accept trailing key/value pairs after their positional arguments, so you can write -t HOST PORT lossless on instead of having to repeat the device subletter via -gt.
New sensitivity_high config option for SDR input selects the higher-sensitivity ("challenger") decoder model — useful when you want maximum decode rate and CPU headroom allows it.

New CMake option -DWEBVIEWER=OFF produces a headless build without WebDB/WebViewer/HTTPServer (~1.5 MB smaller binary). The -N flag and the server config key are gated when the webviewer is disabled.
aiscat — Python bindings for the AIS-catcher NMEA decoder are now published on PyPI. The package exposes a Decoder with decode() / from_file / from_stdin / from_tcp / from_udp helpers, multiple output formats (dictionary, annotated, json, json_nmea, nmea, nmea_tag, binary), and ships pre-built wheels including armv7l and Windows ARM64. Free-threaded (3.13t / 3.14t) wheels are also published, plus an additional decoder speedup. See Tools → Python for details.