Q1. 🤔 According to the text, what is the primary sense that fog signals appeal to?
- Sight
- Smell
- Hearing
- Taste
Answer: Hearing
Q2. 🧐 According to the text, what were once considered serious obstructions to sound, but have since been scientifically proven to have no sensible power to obstruct sound?
- Wind and acoustic clouds
- Rain, hail, snow, or fog
- The atmosphere and wind
- Only acoustic clouds
Answer: Rain, hail, snow, or fog
Q3. 🤯 What does the text suggest is the true test of a sound signal's effectiveness, rather than how far it can be heard under ideal conditions?
- That it is heard by all vessels in the vicinity
- That it can be heard five to seven miles away
- That it shall, under all conditions of weather, be uniformly effective at a short distance[1]
- The frequency with which it is reported by passing ships
Answer: That it shall, under all conditions of weather, be uniformly effective at a short distance

Fog-Signals and Sound Navigation

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