From eaa1f793ff7a28085c540c0553e114abf1a81c54 Mon Sep 17 00:00:00 2001
From: Ulrich Meine <145987006+Scorgan01@users.noreply.github.com>
Date: Thu, 23 Jul 2026 00:07:17 +0200
Subject: [PATCH] PageCurrent: Limit leeway size when STW is too small

---
 lib/obp60task/PageCurrent.cpp | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/lib/obp60task/PageCurrent.cpp b/lib/obp60task/PageCurrent.cpp
index 4af8a79..15820af 100644
--- a/lib/obp60task/PageCurrent.cpp
+++ b/lib/obp60task/PageCurrent.cpp
@@ -106,12 +106,15 @@ private:
         double stw // speed through water (m/s)
     )
     {
-        if (stw == 0) {
-            return 0;
+        static constexpr double MINSTW = 0.5; // minimum speed (m/s) for leeway calculation to prevent math explosion
+        static constexpr double MAXLAY = 30.0 * DEG_TO_RAD; // cap leeway at this level of degree; 
+
+        if (stw < MINSTW) {
+            return 0; 
         }
 
         double lay = leeK * roll / (stw * stw);
-        return lay;
+        return std::min(lay, MAXLAY);
     }
 
     double calcCTW(