Boating Coach US
Rules of the roadQuestion 222 of 352

In restricted visibility, when must you navigate with extreme caution after hearing a fog signal ahead?

  1. Until the fog signal stops
  2. For one hour
  3. Until you reach port
  4. Until the danger of collision is over
Show answer

Correct answer: Until the danger of collision is over

Extreme caution is needed until danger of collision is over.

Source: US Code of Federal Regulations (eCFR), 33 CFR Part 83: Inland Navigation Rules, § 83.19 Conduct of vessels in restricted visibility (Rule 19)

All questionsPractice the topic "Rules of the road"

Questions last reviewed: 18 October 2026