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Q: When must navigational lights be displayed?
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What is true of navigational lights on power driven vessels?

On power-driven vessels, navigation lights must be on during periods of restricted visibility.


Did German u-boats have any external lights in World War 1?

Yes, they had navigational lights.


Are navigational lights on all sides of the Washington monument?

yes there are lights on all four corners or the monument...


Why do jet skis don't have navigational lights?

Jet skis are classified as Personal Watercraft and it is illegal to operate a PWC after dark therefore no navigational lights are needed. The same applies to kayaks, canoes, and any other PWC.


What must registration numbers be displayed?

Where must registration number be displayed


What are the characteristics of nav lights on a power driven vessel?

The characteristics of navigation lights on a power driven vessel includes sidelights, sternlight, masthead light, and all-round white lights. Navigation lights must be displayed from sunset until sunrise as well as anytime visibility is restricted.


How were the colors on the red and green navigational lights originated?

it was because it was red and purple it was because it was red and purple


How do running lights on a car work?

Different countries have different rules for what lights need to be showing when the vehicle is in motion. Generally, it refers to the lights you must display when driving a vehicle on a public road. These rules vary.In Sweden, for instance, you must always display tail lights and dipped or low beam headlights whilst moving. In cars manufactured in such countries the required 'running lights' illuminate when the engine is started. Other lights are additional for mist and fog.Elsewhere, the UK for instance, dipped or low beam headlights and tail lights must be displayed when visibility is restricted or between certain hours. There is no exact definition of what 'restricted visibility' means. At least one high intensity rear light must be additionally displayed when visibility is severely restricted, fog for instance.Side lights or parking lights are not called running lights, nor have they been since the very early days of motoring.A basic rule is if in doubt put your dipped or low beam headlights on.


What does red green and white lights on a boat mean at night?

At night, boats are supposed to display navigational lights; these are red, green, and white. The lights are screened/shielded so that each light is only visible from a certain range of directions.If you are on a boat and can see the red, green, and white navigational lights from another boat all at the same time, you should watch out, because that means that it is moving directly toward you and there is the possibility of a collision.


What are the two safety lights that are displayed during takeoff in an aeroplane?

dono dono


How do you recognize towing vessel at night?

White lights displayed above cabin


In Washington State when must a skier-down flag be displayed?

In Washington State, a skier-down flag must be displayed when a skier is in the water.