🔍 Key Concepts

• Rule 35 – Sound Signals in Restricted Visibility (Navigation Rules) • Difference between a power‑driven vessel underway making way and a vessel not under command (NUC) or otherwise restricted • How a vessel’s status change (normal power vs loss of propulsion) affects its fog signal

💭 Think About

• First, recall what fog signal a normal power‑driven vessel underway and making way is required to sound at intervals of not more than 2 minutes. • Then, think about what the Rules say for a vessel that is not under command or restricted in her ability to maneuver in restricted visibility. How does that signal pattern differ? • Ask yourself: Does the immediate loss of propulsion change you from an ordinary power‑driven vessel to one of these special categories for sound signals, and if so, to which sound pattern does the Rule point?

✅ Before You Answer

• Look up Rule 35(a) for a power‑driven vessel underway and making way, and note the exact pattern and interval. • Look up Rule 35(c) for vessels not under command, restricted in ability to maneuver, constrained by draft, sailing, fishing, and towing to see their required sound pattern and interval. • Verify whether the situation described (loss of propulsion while underway) is treated, for exam purposes, as changing the vessel’s category for fog signals under Rule 35, and match that to the correct pattern in the choices.