MAG/NAV/M1 - Missing data

TSI instrument was removed without mentor knowledge.  Associated TSI serial port was 
required for NAV data collection.  NAV data collection resumed after substituting null device 
for missing TSI serial port.

Surrogate motion data sources might be reconstructed depending on specific requirements.  
Contact SEANAV mentor for discussion.

Contact SEANAV mentor

• Ship surge acceleration along ship length, positive forward(surge_acceleration)
• Yaw angular rate, clockwise bow rotation positive(yaw_angular_rate)
• Ship sway velocity, starboard-to-port displacement, positive to port(sway_velocity)
• base time in epoch(base_time)
• Heave directional velocity, up positive(heave_velocity)
• Ship sway, starboard-to-port displacement, positive to port(sway)
• Roll angle reported by tilt table, positive is port side up(roll)
• North Latitude(lat)
• Ship sway acceleration starboard-to-port, positive to port(sway_acceleration)
• Seanav monitor value as true/false conditions(seanav_monitor)
• Seanav system mode(seanav_mode)
• -180.0 - +180.0(alt)
• time_in_seconds_since_volume_start(time)
• Time offset from base_time(time_offset)
• Heave directional acceleration, up positive(heave_acceleration)
• Roll angular rate, positive is port side up(roll_angular_rate)
• Free running cycle counter(cycle_count)
• Ship yaw, axis vertical, positive is clockwise rotation(yaw)
• Ship surge velocity along ship length, positive forward(surge_velocity)
• Ship surge displacement along ship length, positive forward(surge)
• lon(lon)
• Pitch angular rate, bow up positive(pitch_angular_rate)
• Pitch, bow up positive(pitch)
• Heave: up positive(heave)