information on this can be found here.
9. If using IMU04, Internal IMU Attitude channels (Head_imu, Pitch_imu, Roll_imu, Pos.Qual., Lng_Jerk,
Lat_Jerk and Head_imu2) will automatically be set to log. If IMU Attitude data is required to be displayed as a
Live Serial data display then the user must tick the channels for 'Send over serial'.
https://en.racelogic.support//Product_Info/VBOX_Data_Loggers/VBOX_3i_Range/VBOX_3i_User_Guide_(All_Variants)/12-1_-
_VB3i_IMU_Integration_-_In-Vehicle_Mounted
56