From 5ef12391e143099e445912222f8105633dad0cb9 Mon Sep 17 00:00:00 2001
From: Rudy Celekli <rudy@gradiahq.com>
Date: Sun, 25 Oct 2026 12:32:18 -0400
Subject: [PATCH] =?UTF-8?q?fix(cockpit):=20show=20wind=20from=20359.6?=
 =?UTF-8?q?=C2=B0=20as=200=C2=B0,=20not=20360=C2=B0?=
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formatCockpitWindDirection rounded the bearing and printed that number, so wind from 359.5° or more read "N · 360°". Take the rounded degrees modulo 360 so north reads 0°.
---
 changelog.d/1389-cockpit-wind-north.md |  3 +++
 src/ui/cockpitPresentation.js          |  4 +++-
 src/ui/cockpitPresentation.test.mjs    | 10 ++++++++++
 3 files changed, 16 insertions(+), 1 deletion(-)
 create mode 100644 changelog.d/1389-cockpit-wind-north.md
 create mode 100644 src/ui/cockpitPresentation.test.mjs

diff --git a/changelog.d/1389-cockpit-wind-north.md b/changelog.d/1389-cockpit-wind-north.md
new file mode 100644
index 000000000..cc81c362e
--- /dev/null
+++ b/changelog.d/1389-cockpit-wind-north.md
@@ -0,0 +1,3 @@
+- Show cockpit wind from 359.5° or more as 0°, not 360°. Rounding 359.6°
+  printed "N · 360°" on the local wind direction
+  (Rudy Celekli, @rudycelekli, #1389).
diff --git a/src/ui/cockpitPresentation.js b/src/ui/cockpitPresentation.js
index 8285b74b3..b9c000503 100644
--- a/src/ui/cockpitPresentation.js
+++ b/src/ui/cockpitPresentation.js
@@ -156,7 +156,9 @@ export function formatCockpitWindDirection(value) {
   if (!Number.isFinite(value)) return t('DIR UNKNOWN');
   const labels = Object.keys(COMPASS_POINT_LABELS);
   const normalized = ((value % 360) + 360) % 360;
-  return `${compassPointLabel(labels[Math.round(normalized / 45) % labels.length])} · ${Math.round(normalized)}°`;
+  // 359.5° and above is north. Modulo keeps that from printing 360°.
+  const degrees = Math.round(normalized) % 360;
+  return `${compassPointLabel(labels[Math.round(normalized / 45) % labels.length])} · ${degrees}°`;
 }
 
 // Digit grouping and decimal marks (`26,175`, `26 175`, `26.175`) take a
diff --git a/src/ui/cockpitPresentation.test.mjs b/src/ui/cockpitPresentation.test.mjs
new file mode 100644
index 000000000..da5c8e53b
--- /dev/null
+++ b/src/ui/cockpitPresentation.test.mjs
@@ -0,0 +1,10 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+import { formatCockpitWindDirection } from './cockpitPresentation.js';
+
+test('wind just west of north reads 0°, not 360°', () => {
+  assert.equal(formatCockpitWindDirection(90), 'E · 90°');
+  assert.equal(formatCockpitWindDirection(0), 'N · 0°');
+  assert.equal(formatCockpitWindDirection(359.4), 'N · 359°');
+  assert.equal(formatCockpitWindDirection(359.6), 'N · 0°');
+});