A vessel not under command; a vessel restricted in her ability to manoeuvre; a vessel constrained by her draught; a sailing vessel; a vessel engaged in fishing and a vessel engaged in towing or pushing another vessel in restricted visibility.
in COLREG - 72
Colreg Rule 37(c)
![colreg day 19](https://shipinspection.eu/wp-content/uploads/2015/10/colreg-day-19.gif)