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AhaBulb: Stuff Everyone Should Know · ahabulb.com/boat-fire-extinguisher-count-under-26

A 20-foot inboard motorboat with no built-in fire system needs at least how many 5-B extinguishers?

One 5-B extinguisher.

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  1. None
  2. Two
  3. One ✔

Why: The federal table for boats without a fixed engine room system requires one 5-B extinguisher under 26 feet, two from 26 to under 40 feet, and three from 40 to 65 feet.

Huh, didn't know that: One 20-B extinguisher may stand in for two 5-B extinguishers.

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Where do boats go when they're sick? To the dock.
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References

Answer: One. The federal table for boats without a fixed engine room system requires one 5-B extinguisher under 26 feet, two from 26 to under 40 feet, and three from 40 to 65 feet.

  1. 33 CFR 175.320 Fire extinguishing equipment required www.ecfr.gov/current/title-33/chapter-I/subchapter-S/part-175/subpart-E/section-175.320
    16 or more, but less than 26 | 1 | 0
    Checked 2026-10-09.
  2. 33 CFR 175.320 Fire extinguishing equipment required www.ecfr.gov/current/title-33/chapter-I/subchapter-S/part-175/subpart-E/section-175.320
    One 20-B portable fire extinguisher may be substituted for two 5-B portable fire extinguishers.
    Checked 2026-10-09.

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