🔍 Key Concepts

• Rule 35 – Sound signals in restricted visibility (Navigation Rules) • Difference between signals for power-driven vessels and vessels underway but not making way / at anchor / aground • Whether a sailing vessel underway has the same or different fog signal from a power-driven vessel underway

💭 Think About

• First decide: in fog, what is the standard interval (in minutes) for most underway-vessel fog signals? Eliminate any options with the wrong interval. • Ask yourself: does the wind direction (ESE) change the type of vessel or her status for fog signals, or is that detail a distraction? • Recall the specific sound signal required for a sailing vessel underway in or near an area of restricted visibility and compare it to the listed patterns of short and prolonged blasts.

✅ Before You Answer

• Verify in Rule 35 what sound signal is prescribed for a sailing vessel underway (not at anchor, not aground). • Check whether the rule uses 1-minute or 2-minute intervals for this type of vessel. • Confirm if the signal involves only prolonged blasts or a combination of prolonged and short blasts for a sailing vessel in fog.