BOTH INTERNATIONAL & INLAND Vessels "A" and "B" are meeting in a narrow channel as shown in illustration D029RR below but are not in sight of one another due to restricted visibility. Which statement is TRUE concerning whistle signals between the vessels?
• Rule 34 – Maneuvering and Warning Signals (when vessels are IN sight of one another) • Rule 35 – Sound Signals in Restricted Visibility (when vessels are NOT in sight of one another) • Special considerations for narrow channels versus restricted visibility situations
• Ask yourself: Are whistle signals of one or two short blasts used when vessels are NOT in sight of one another in restricted visibility? Which rule governs that situation? • Look at the illustration: The vessels are in a narrow channel and meeting head‑on, but the question says they are NOT in sight. Which set of rules takes priority: narrow channel meeting signals, or restricted visibility signals? • Consider what kind of sound signal pattern (short vs. prolonged blasts) is specified for power‑driven vessels underway and making way in restricted visibility.
• Verify in Rule 34 whether one and two short blasts apply only when vessels are in sight of one another. • Verify in Rule 35 what sound signals power‑driven vessels must make in restricted visibility when underway and making way. • Check whether any of the options mention the correct type of blasts (short vs. prolonged) and pattern required under Rule 35 for this situation.
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