...

cxx/mount_pz.h

@@ -235,6 +235,14 @@ public:
     bool inZone(const MccAngle& x, const MccAngle& y, const MccProhibitedZone::pzcontext_t& context)
     {
         if (context.coords_kind == MccProhibitedZone::COORDS_KIND_AZALT) {  // trivial case
+            auto xx = x;
+            xx.normalize<MccAngle::NORM_KIND_180_180>();  // to [-180, 180]
+
+            if (std::fabs(xx) <= _deltaAZ) {  // check at the South
+                return true;
+            } else if (std::fabs(xx - std::numbers::pi) <= _deltaAZ) {  // check at the North
+                return true;
+            }
         }
 
         return false;