From 9ac429ab13acac2833ac37657cf2337c7f3ebb53 Mon Sep 17 00:00:00 2001
From: "Dr.-Ing. Amilcar Do Carmo Lucas" <amilcar.lucas@iav.de>
Date: Tue, 2 May 2017 15:38:01 +0200
Subject: [PATCH] AC_Fence: Use SI units conventions in parameter units

Follow the rules from:
http://physics.nist.gov/cuu/Units/units.html
http://physics.nist.gov/cuu/Units/outside.html
and
http://physics.nist.gov/cuu/Units/checklist.html
one further constrain is that only printable (7bit) ASCII characters are allowed
---
 libraries/AC_Fence/AC_Fence.cpp | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/libraries/AC_Fence/AC_Fence.cpp b/libraries/AC_Fence/AC_Fence.cpp
index bc916ce07a..5a252ad3d2 100644
--- a/libraries/AC_Fence/AC_Fence.cpp
+++ b/libraries/AC_Fence/AC_Fence.cpp
@@ -31,7 +31,7 @@ const AP_Param::GroupInfo AC_Fence::var_info[] = {
     // @Param: ALT_MAX
     // @DisplayName: Fence Maximum Altitude
     // @Description: Maximum altitude allowed before geofence triggers
-    // @Units: Meters
+    // @Units: m
     // @Range: 10 1000
     // @Increment: 1
     // @User: Standard
@@ -40,7 +40,7 @@ const AP_Param::GroupInfo AC_Fence::var_info[] = {
     // @Param: RADIUS
     // @DisplayName: Circular Fence Radius
     // @Description: Circle fence radius which when breached will cause an RTL
-    // @Units: Meters
+    // @Units: m
     // @Range: 30 10000
     // @User: Standard
     AP_GROUPINFO("RADIUS",      4,  AC_Fence,   _circle_radius, AC_FENCE_CIRCLE_RADIUS_DEFAULT),
@@ -48,7 +48,7 @@ const AP_Param::GroupInfo AC_Fence::var_info[] = {
     // @Param: MARGIN
     // @DisplayName: Fence Margin
     // @Description: Distance that autopilot's should maintain from the fence to avoid a breach
-    // @Units: Meters
+    // @Units: m
     // @Range: 1 10
     // @User: Standard
     AP_GROUPINFO("MARGIN",      5,  AC_Fence,   _margin, AC_FENCE_MARGIN_DEFAULT),
@@ -63,7 +63,7 @@ const AP_Param::GroupInfo AC_Fence::var_info[] = {
     // @Param: ALT_MIN
     // @DisplayName: Fence Minimum Altitude
     // @Description: Minimum altitude allowed before geofence triggers
-    // @Units: Meters
+    // @Units: m
     // @Range: -100 100
     // @Increment: 1
     // @User: Standard