PSF Exit Exam • Set 2 Question 7 of 30
Fitted with reflective tape and lifejacket lights, what would be the expected range of visibility in darkness.
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Direct Answer
Option A: 1 mile
Lifejacket lights fitted with retroreflective material must produce a luminous intensity of not less than 0.75 candela in all directions of the upper hemisphere, providing a night visibility range of at least 1 nautical mile.
All Options
A
1 mile
(Correct Answer)
B
0.5 mile
C
1.5 miles
D
2 miles
Detailed Explanation & Context
Lifejacket lights fitted with retroreflective material must produce a luminous intensity of not less than 0.75 candela in all directions of the upper hemisphere, providing a night visibility range of at least 1 nautical mile.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Passenger Ship Familiarization (PSF).
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