Gpvtg
This is a ROS message definition.
Source
# Message from GPVTG NMEA String
std_msgs/Header header
string message_id
# Track made good relative to true north
float32 track_t
string track_t_ref
# Track made good relative to magnetic north
float32 track_m
string track_m_ref
# Measured horizontal speed in knots
float32 speed_n
string speed_n_unit
# Measured horizontal speed in km/hr
float32 speed_k
string speed_k_unit
# Mode indicator
string mode_indicator