From 3b1b57a33e128975a9cf6946a6bf9dbd33d148cf Mon Sep 17 00:00:00 2001
From: Frank <frank@inter-zone.de>
Date: Thu, 16 Feb 2023 17:20:53 +0100
Subject: [PATCH] Update Positionable.lua

- Added GetGroundSpeed
---
 .../Moose/Wrapper/Positionable.lua            | 20 +++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/Moose Development/Moose/Wrapper/Positionable.lua b/Moose Development/Moose/Wrapper/Positionable.lua
index f47d888d8..082977785 100644
--- a/Moose Development/Moose/Wrapper/Positionable.lua	
+++ b/Moose Development/Moose/Wrapper/Positionable.lua	
@@ -897,6 +897,26 @@ function POSITIONABLE:GetAirspeedIndicated(oatcorr)
   return ias
 end
 
+--- Returns the horizonal speed relative to eath's surface. The vertical component of the velocity vector is projected out (set to zero).
+-- @param #POSITIONABLE self
+-- @return #number Ground speed in m/s. Returns 0 if the POSITIONABLE does not exist.
+function POSITIONABLE:GetGroundSpeed()
+
+  local gs=0
+  
+  local vel=self:GetVelocityVec3()
+  
+  if vel then
+    
+    local vec2={x=vel.x, y=vel.z}
+    
+    gs=UTILS.Vec2Norm(vel)
+  
+  end
+
+  return gs
+end
+
 --- Returns the Angle of Attack of a POSITIONABLE.
 -- @param #POSITIONABLE self
 -- @return #number Angle of attack in degrees.