A vessel,which is unable to maneuver due to some exceptional circumstance,shall exhibit ().
- Aduring the day,three balls in a vertical line
- Bduring the day,three shapes,the highest and lowest being balls and the middle being a diamond
- Cwhen making way at night,two all-round red lights,sidelights,and a sternlight
- Dwhen making way at night,masthead lights,sidelights,and a sternlight