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Sailing vessel day shape. Vessels under 7m in length not using an engine and unable to exhibit the lighting configurationReminder -whenever a sailing vessel is using its engine with or without sails it is a power-driven vessel within the meaning of the rules and must act accordingly and show the appropriate shapes by day and lights by night. A boat under sail alone will have red and green sidelights and a stern light but since it is not under power it will not have a masthead light. Day shapes need to be shown from sunrise to sunset.

Any vessel anchored will display a black disc which is the day shape indicating the vessel is anchored. Terms in this set 11. Sailing vessels over 12 metres in length when also being powered by motor should display a conical shape with the apex pointing downwards.

A Vessel aground Over 50m 2 white masthead lights anchor the higher being at the front and 2 red vertical lights. H Fishing vessel at anchor showing basket by day indicating its occupation to an approaching vessel. Nav Lights Shapes Quiz 1.

Day Shape for a Sailing Vessel The next boat that is the least manoeuvrable is a sailing vessel. Now try Night lights. When would you use this day shape.

This is not always easy especially in crowded coastal waters. Vessel proceeding under sail when also being propelled by machinery. White masthead light red and green sidelights white sternlig.

Seen from just off the port Bow. Port light just and stern light. Day shapes are geometric figures that relay something important about vessel navigation.