🔍 Key Concepts

• Inland Rule 35 – Sound signals in restricted visibility (especially the parts about vessels at anchor) • The special provision for vessels under 20 meters in length in a special anchorage area designated by the Secretary • Difference between the normal anchor fog signal and any exemptions in special anchorages

💭 Think About

• First, recall what sound signal an anchored vessel is normally required to make in fog (how often, what instrument, and for how long). Then ask: does this 15‑meter vessel fall under that normal rule? • Next, look at the Inland Rules text for any special note about vessels under 20 meters in a special anchorage area. Does the rule change for them? • Compare each answer choice with what the rule actually says about: (1) using a whistle vs. bell vs. horn, (2) the correct time interval (every 1 minute vs. 2 minutes), and (3) whether any signal is required at all in this specific situation.

✅ Before You Answer

• Verify in Inland Rule 35 what sound a vessel at anchor is normally required to make and at what time interval. • Check the exact wording about a vessel less than 20 meters at anchor in a special anchorage area – does it say it “shall” make a signal or that it “need not”? • Confirm whether any of the answer choices use the wrong interval (2 minutes instead of 1 minute) or the wrong device (whistle vs. bell) for an anchored vessel.