... Seamanship Techniques RedGreenVessel less than 50 m in lengthrestricted in her ability to manoeuvre.GreenRed, white, red,all-round lightsshown where theycan best be seen.RedRange 2 milesHead ... canGreenGreenConicalSparPillarRedGreenRedRedGreenPreferred channel to starboard, red with green stripe, andred light flashing 2 + 1 (group flashing).GreenRedGreenGreenRedPreferred ... the vessel exceeds 6 metres, then at a heightabove the hull not less than such breadth, so however that the lightneed not be placed at a greater height above the hull than 12metres;(ii) when...