Question 93Electricity & Electronics - 1st Asst/Chief

70% to pass

Which of the following data communication cable types offers the greatest immunity to electromagnetic "noise"?

AFiber-optic
BUnshielded twisted pair
CCoaxial (coax)
DShielded twisted pair
AI Explanation

The correct answer is A) Fiber-optic. Fiber-optic cables offer the greatest immunity to electromagnetic "noise" because they transmit data using light rather than electrical signals. Light signals are not affected by electromagnetic interference (EMI) or radio frequency interference (RFI), which can corrupt electrical signals in other cable types like unshielded twisted pair (B) or coaxial (C) cables. Shielded twisted pair (D) cables have better noise immunity than unshielded twisted pair, but still cannot match the complete immunity of fiber-optic cables.

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Official Resources
46 CFR Electrical Engineering 46 CFR Machinery & Electrical USCG National Maritime Center
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