fix: raise conditions throttle to 20 min / 10 nm to stop 429s

Previous gate (5 min AND 2 nm) meant any pan > 2 nm triggered a
fresh fetch regardless of how recently one completed. Raised to
20 min OR 10 nm — marine conditions don't change meaningfully
at finer resolution than that.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/android-app/app/src/main/kotlin/org/terst/nav/ui/MainViewModel.kt b/android-app/app/src/main/kotlin/org/terst/nav/ui/MainViewModel.kt
index 530af39..502c44f 100644
--- a/android-app/app/src/main/kotlin/org/terst/nav/ui/MainViewModel.kt
+++ b/android-app/app/src/main/kotlin/org/terst/nav/ui/MainViewModel.kt
@@ -242,14 +242,14 @@ class MainViewModel(
 
     /**
      * Fetches current conditions snapshot for [lat]/[lon] and exposes it via [marineConditions].
-     * Throttled: skips if conditions loaded < 5 min ago and position < 2 nm from last load.
+     * Throttled: skips unless the position moved >= 10 nm OR data is >= 20 min old.
      */
     fun loadConditions(lat: Double, lon: Double) {
         val nowMs  = System.currentTimeMillis()
         val ageMs  = nowMs - lastConditionsMs
         val distNm = if (lastConditionsLat.isNaN()) Double.MAX_VALUE
                      else distanceNm(lastConditionsLat, lastConditionsLon, lat, lon)
-        if (ageMs < 5 * 60_000L && distNm < 2.0) {
+        if (ageMs < 20 * 60_000L && distNm < 10.0) {
             NavLogger.i("conditions", "skip age=${ageMs / 1000}s dist=%.1fnm".format(distNm))
             return
         }