Navigation Lights and Vessel Interactions Quiz

In a crossing situation between two power-driven vessels, which vessel typically has the right of way?

When a vessel is uncertain whether it is in a head-on or crossing situation, what should it assume and do?

What does the two-letter signal 'NC' in the International Code indicate to vessels?

In a traffic separation zone, what activity should a vessel using the scheme NOT engage in?

When two power-driven vessels are crossing at night and there is a risk of collision, which vessel should give way?

What should a vessel entering a traffic separation zone forgo doing?

What is the purpose of a traffic separation scheme?

In poor visibility, what is the best way to monitor the risk of collision?

What does a vessel constrained by its draught have to show as additional lights?

Which situation does the display of three red lights in a vertical line indicate?

What is the duration of a 'short blast' on the whistle?

What is the term for routeing measure aimed at the separation of opposing streams of traffic by establishing traffic lanes?

When observing masthead lights and both side lights of another vessel at night, what action should be taken?

In Annex II of the Collision Regulations, what does the signal 'one white light over one red light' for fishing vessels in close proximity indicate?

When the bearing is steady and the range is 5 miles, what is indicated by a slow reduction in range?

What should be done on nearing a bend in a narrow channel when the way ahead is obscured and you hear a prolonged blast?

In a narrow channel, if you observe masthead lights and both side lights of another vessel at night, what does it imply?

When navigating close to the outer limit of a channel with a vessel nearby, what action should be avoided if possible?

What is the prescribed range for the fundamental frequency of a whistle for a vessel between 75 meters and 200 meters in length, as per Annex III of the COLREGS?

Where should the forward anchor light of a vessel of 50 meters or more in length be placed above the hull, according to COLREGS, Annex I?

According to COLREGS Annex IV, what does an orange flag with a black circle and a square shape indicate?

How far apart shall the whistles of a combined whistle system be located?

In what direction shall the light indicating the outlying gear from a fishing vessel be placed in relation to the all-round red and white lights?

For power-driven vessels of 20 meters or more in length, how high should two or three lights carried vertically be above the hull, except where a towing light is required?

Which option describes a light characteristic requirement for stern and masthead lights on a vessel as per COLREGS?

Where should two or three lights on a power-driven vessel of less than 20 meters in length be placed above, except when a towing light is required?

According to COLREGS Annex I, how should the vertical separation of masthead lights of a power-driven vessel be when viewed from sea level?

What fundamental frequency range is required for a vessel less than 75 meters in length, according to Annex III of the International Collision Regulations?

What is the purpose of firing a gun at one-minute intervals according to COLREGS Annex IV?

What is the minimum sound pressure level required at a distance of one meter from a bell or gong, as specified in Annex III of COLREGS?

In terms of audibility, within what range should the fundamental frequency of a whistle for a vessel 200 meters or more in length be according to COLREGS Annex III?

What is the required minimum length for a vessel if the fundamental frequency of its whistle is between 250 - 700 Hz based on COLREGS Annex III?

Under COLREGS Annex III, what is the audibility range for a whistle signal where two miles can be covered?

For a directional whistle under COLREGS Annex III, what is the maximum allowed difference in sound pressure level from the prescribed level on the axis within the horizontal plane?