USCG Exam Practice · Rule 37 — Distress Signals
A high-intensity white light flashing at regular intervals is listed as a distress signal under 33 CFR §87.01. To qualify as this distress signal, the light must flash at which rate?
- A20 to 30 times per minute
- B30 to 50 times per minute
- C50 to 70 times per minute✓ correct
- D70 to 90 times per minute
Why C is correct
33 CFR §87.01(p) specifies that the high-intensity white light must flash at regular intervals from 50 to 70 times per minute to constitute a recognized distress signal. Rates outside this range are not listed as meeting the standard.
Cited:33 CFR §87.01
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