Safety
Not Under Command
Also known as: NUC
Definition
A vessel unable to manoeuvre as the rules require through some exceptional circumstance, such as a steering failure. Shows two all-round red lights or two black balls.
See it in practice
More Safety terms
Where Not Under Command comes up in the course
Free theory lessons that use this term in context.
- OOW UnlimitedCOLREGs: Lights, Shapes and Sound Signals for Large Ships
- Competent CrewCOLREGS Introduction
- Yachtmaster OffshoreCOLREGs for the Yachtmaster
- Day SkipperCOLREGS Rules and Lights
- Coastal SkipperCOLREGs, Traffic Separation and Restricted Visibility
- OOW UnlimitedCOLREGs for the OOW: Steering and Sailing Rules