The four standard light colors used for...

Question 1 / 2707066636ee928f7522a1c5197e9

Question 1 of 2707066636ee928f7522a1c5197e9

The four standard light colors used for lighted aids to navigation are red, green, white, and __________.

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Question 1 of 27070

Q

The four standard light colors used for lighted aids to navigation are red, green, white, and __________.

🔍 Key Concepts

• IALA Maritime Buoyage System standard light colors • Difference between colors used on buoys versus colors used for special purpose marks • How many distinct colors a mariner must be able to distinguish on a nighttime charted light

💭 Think About

• Look at common light colors shown on nautical charts and ask which one among the options you actually see used on aids to navigation at night. • Think about which colors are easiest for the human eye to distinguish at distance and in poor visibility. • Eliminate any color choices that you’ve rarely or never seen listed in the ‘Light Characteristics’ column of a Light List or chart.

✅ Before You Answer

• Mentally review the colors of port, starboard, and safe water marks and see what additional color is frequently used. • Ask yourself which of these options is associated with special purpose or cautionary marks in buoyage systems. • Verify which of the four choices appears as a standard color in Coast Guard Light Lists and on NOAA charts.

Question 1 of 27070

Q

The four standard light colors used for lighted aids to navigation are red, green, white, and __________.

A

orange

B

blue

C

purple

D

yellow

Question 1 / 2707066636ee928f7522a1c5197e9

Question 1 of 2707066636ee928f7522a1c5197e9

The four standard light colors used for lighted aids to navigation are red, green, white, and __________.

Back

Question 1 of 27070

Q

The four standard light colors used for lighted aids to navigation are red, green, white, and __________.

🔍 Key Concepts

• IALA Maritime Buoyage System standard light colors • Difference between colors used on buoys versus colors used for special purpose marks • How many distinct colors a mariner must be able to distinguish on a nighttime charted light

💭 Think About

• Look at common light colors shown on nautical charts and ask which one among the options you actually see used on aids to navigation at night. • Think about which colors are easiest for the human eye to distinguish at distance and in poor visibility. • Eliminate any color choices that you’ve rarely or never seen listed in the ‘Light Characteristics’ column of a Light List or chart.

✅ Before You Answer

• Mentally review the colors of port, starboard, and safe water marks and see what additional color is frequently used. • Ask yourself which of these options is associated with special purpose or cautionary marks in buoyage systems. • Verify which of the four choices appears as a standard color in Coast Guard Light Lists and on NOAA charts.