RT_INS_Attitude: INS Yaw, Pitch and Roll
RT_INS_Attitude: 142, 1 (0x8E0120 + unit id) (0x381)
Byte 0: Validity
Byte 1: Accuracy
Bytes 2-3: INS Yaw (degrees)
Bytes 4-5: INS Pitch (degrees)
Bytes 6-7: INS Roll (degrees)
Resolution of yaw, pitch and roll is degrees/100.