content prioritised according to exam question probability
Nav lights
Starboard light (green, right side, 112.5 deg)
Port light (red, left side 112.5 deg)
Stern light (white, back side, 135 deg)
Other Lights
Masthead (white, front side, 225 deg)
All round light (white, all around, 360 deg)
Stern towing light (yellow, back side, 135 deg)
Under sail
Can have tricolour light in the mast
22.5% abaft of beamside
>70m must have seperate nav lights and stern light astern
under sail never has a masthead light on
Fog signal sound: 1 long 2 short (visibility less than 20m)
Power driven vessels
All round light + starboard & port light
>70m must have seperate nav lights, stern light astern and masthead light
Fog signal sound: 1 long (visibility less than 20m)
Under sail
Can have tricolour light in the mast
22.5% abaft of beamside
>70m must have seperate nav lights and stern light astern
under sail never has a masthead light on
Fog signal sound: 1 long 2 short (visibility less than 20m), at least every 2 minutes
Power driven vessels
All round light + starboard & port light
>70m must have seperate nav lights, stern light astern and masthead light
Fog signal sound: 1 long (visibility less than 20m)