diff --git a/Direction.h b/Direction.h
index b614a04..1120c6b 100644
--- a/Direction.h
+++ b/Direction.h
@@ -91,6 +91,12 @@ protected:
 using DirectionSingle = DirectionOf<float>;
 using Direction16 = DirectionOf<signed short>;
 
+#if defined(ARDUINO)
+using Direction = Direction16;
+#else
+using Direction = DirectionSingle;
+#endif
+
 } // namespace LinearAlgebra
 } // namespace Passer
 using namespace Passer::LinearAlgebra;
diff --git a/Spherical.h b/Spherical.h
index e4d6682..3131a53 100644
--- a/Spherical.h
+++ b/Spherical.h
@@ -180,6 +180,12 @@ using SphericalSingle = SphericalOf<float>;
 /// hardware
 using Spherical16 = SphericalOf<signed short>;
 
+#if defined(ARDUINO)
+using Spherical = Spherical16;
+#else
+using Spherical = SphericalSingle;
+#endif
+
 } // namespace LinearAlgebra
 } // namespace Passer
 using namespace Passer::LinearAlgebra;