- sides: retro-reflective white-red or yellow-red arrows pointing towards the front of the vehicle; the arrows cover at least an area of 1 m wide and 30 cm high
- on the roof: at least 2 yellow-orange rotating or flashing lights that must be visible all around
at the back: a light bar with orange warning arrows (only if the assistance vehicle is deployed behind the port vehicles to be assisted)
General appearance (note: the yellow colour is optional!):