From 315c0f5dc61304cdf0adbd71e5efb1633e47e474 Mon Sep 17 00:00:00 2001
From: Rudy Celekli <rudy@gradiahq.com>
Date: Sun, 25 Oct 2026 15:58:46 -0400
Subject: [PATCH 1/2] =?UTF-8?q?fix(local-adsb):=20show=20a=20359.7=C2=B0?=
 =?UTF-8?q?=20track=20as=20TRK=200=C2=B0,=20not=20TRK=20360=C2=B0?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The Local ADS-B card rounded the track without wrapping, so an aircraft
tracking 359.5° or more read "TRK 360°". The rounded track now wraps
to 0°.
---
 changelog.d/1396-local-adsb-track-north.md |  3 +++
 src/layers/localAdsb/card.js               |  2 +-
 src/layers/localAdsb/card.test.mjs         | 19 +++++++++++++++++++
 3 files changed, 23 insertions(+), 1 deletion(-)
 create mode 100644 changelog.d/1396-local-adsb-track-north.md
 create mode 100644 src/layers/localAdsb/card.test.mjs

diff --git a/changelog.d/1396-local-adsb-track-north.md b/changelog.d/1396-local-adsb-track-north.md
new file mode 100644
index 000000000..9235a19a3
--- /dev/null
+++ b/changelog.d/1396-local-adsb-track-north.md
@@ -0,0 +1,3 @@
+- Show a locally heard aircraft tracking 359.5° or more as TRK 0°. The Local
+  ADS-B card rounded the track without wrapping, so 359.7° read "TRK 360°"
+  (Rudy Celekli, @rudycelekli, #1396).
diff --git a/src/layers/localAdsb/card.js b/src/layers/localAdsb/card.js
index 1b0122925..c1c923a8c 100644
--- a/src/layers/localAdsb/card.js
+++ b/src/layers/localAdsb/card.js
@@ -152,7 +152,7 @@ export function localAdsbCardModel(
       t('ALT {altitude} FT · GS {speed} KT · TRK {track}', {
         altitude: grouped(altitude),
         speed: speed === null ? DASH : speed,
-        track: track === null ? DASH : `${track}°`,
+        track: track === null ? DASH : `${track % 360}°`,
       }),
       vertical === null
         ? t('V/S {rate}', { rate: DASH })
diff --git a/src/layers/localAdsb/card.test.mjs b/src/layers/localAdsb/card.test.mjs
new file mode 100644
index 000000000..ec53024da
--- /dev/null
+++ b/src/layers/localAdsb/card.test.mjs
@@ -0,0 +1,19 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+import { setLocale } from '../../i18n/index.js';
+import { localAdsbCardModel } from './card.js';
+
+test('a track of 359.7° reads TRK 0°, not TRK 360°', () => {
+  setLocale('en');
+  const { details } = localAdsbCardModel(
+    {
+      icao: 'abc123',
+      altitudeFt: 12500,
+      groundSpeedKt: 240,
+      trackDeg: 359.7,
+      lastPositionAt: 1000,
+    },
+    5000,
+  );
+  assert.equal(details[1], 'ALT 12,500 FT · GS 240 KT · TRK 0°');
+});

From 6642176de540776a04a7b3d9ed6413c190504530 Mon Sep 17 00:00:00 2001
From: Sameh Khamis <sameh@halfpixel.ai>
Date: Sun, 25 Oct 2026 14:08:32 -0700
Subject: [PATCH 2/2] docs: document Local ADS-B track rounding

---
 docs/CURRENT-STATE.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/docs/CURRENT-STATE.md b/docs/CURRENT-STATE.md
index b15babbb2..921604789 100644
--- a/docs/CURRENT-STATE.md
+++ b/docs/CURRENT-STATE.md
@@ -5994,6 +5994,8 @@ callsign, class and category, adsbdb operator/type and a plausible route when
 known, altitude, ground speed, track, vertical rate, position age, message
 count, "Heard by your receiver"); markers are not camera-followed. Positioned
 aircraft join detection boxes, labelled only with a decoded callsign.
+The card's `TRK` label wraps after rounding to whole degrees, so a track of
+359.5° displays as `TRK 0°` rather than `TRK 360°`.
 
 Receivers publish one record shape from `src/sources/adsbRecords.js`
 (`icao`, `callsign`, `category`, `onGround`, `lat`, `lon`, `altitudeFt`,