read_ais_txt()
Read AIS text file
get_ship_limits()
Get breakdown of distance and time above/below speed limit
get_ship_segments()
Create line segments with speed for specific ship from AIS data
map_ship_limits()
Interactive map of ship limits
map_ship_segments()
Interactive map of ship segments based on location
show_ship_box()
Show value box of ship performance
show_ship_gauge()
Show gauge of ship performance