VfrHud
This is a ROS message definition.
Source
# Metrics typically displayed on a HUD for fixed wing aircraft
#
# VFR_HUD message
std_msgs/Header header
float32 airspeed # m/s
float32 groundspeed # m/s
int16 heading # degrees 0..360
float32 throttle # normalized to 0.0..1.0
float32 altitude # MSL
float32 climb # current climb rate m/s