Free Navigation Lights & Day Shapes Check

Ten randomized questions covering vessel lights, status and day shapes. Explanations point back to the relevant COLREG rule.

Free Lights & Shapes Check

A free 10-question introduction to lights and day shapes.

10 questions · Pass mark 70%

Question 1 of 10What status is shown by two all-round red lights vertically?

Two red all-round lights

Pilot vessel Not under command Aground Restricted in ability to manoeuvre

Please choose an answer.

Question 2 of 10A power-driven vessel under 12 m may display what simplified arrangement?

An all-round white light and sidelights One red light only Sternlight without sidelights A yellow flashing light only

Please choose an answer.

Question 3 of 10White over red all-round lights identify which vessel?

White over red all-round lights

Sailing vessel Fishing vessel Towing vessel Pilot vessel engaged on pilotage duty

Please choose an answer.

Question 4 of 10You see two all-round lights vertically: red over white. What vessel activity is indicated?

Red over white all-round lights

Pilotage duty Fishing other than trawling Trawling Restricted manoeuvrability

Please choose an answer.

Question 5 of 10At night, what basic lights does a power-driven vessel underway normally display?

Two all-round red lights An all-round white light only Sidelights only Masthead light, sidelights and sternlight

Please choose an answer.

Question 6 of 10Two red all-round lights are shown with the prescribed anchor light. What condition is indicated?

Two red lights with an anchor light

Aground Restricted in ability to manoeuvre Trawling Not under command

Please choose an answer.

Question 7 of 10What colors are a vessel’s sidelights?

Red to starboard and green to port Yellow to starboard and blue to port White on both sides Green to starboard and red to port

Please choose an answer.

Question 8 of 10From ahead, you see a masthead light and both red and green sidelights. What is the likely aspect?

White masthead light with red and green sidelights

A pilot vessel stopped A sailing vessel viewed from astern A vessel at anchor A power-driven vessel viewed from ahead

Please choose an answer.

Question 9 of 10What lights identify a sailing vessel underway at night?

A masthead light and two red lights Sidelights and a sternlight An all-round white light only Three green lights

Please choose an answer.

Question 10 of 10What day shape does a sailing vessel display when also propelled by machinery?

A black cylinder A black ball Two cones apex together A black cone apex downward

Please choose an answer.

Practical boating knowledge, clear explanations and enjoyable quizzes for safer, more confident days on the water.