🔍 Key Concepts

• Rule 27 – Vessels Not Under Command or Restricted in Their Ability to Manoeuvre • The specific day shapes used for a vessel restricted in her ability to maneuver • Difference between day shapes and navigation lights (colors are for lights, not shapes)

💭 Think About

• Ask yourself: A vessel transferring provisions or cargo at sea – is she considered restricted in her ability to maneuver under the Rules? • What is the standard set of three shapes used to show a vessel is restricted in ability to maneuver during the day? • Look carefully at which options mention colors versus simple black shapes and decide which makes sense for DAY signals.

✅ Before You Answer

• Verify in Rule 27 that replenishment or transferring persons, provisions or cargo while underway is listed as a type of restricted in ability to maneuver vessel. • Confirm that the day signal for restricted in ability to maneuver is a vertical line of three shapes and note their required order and form (ball / diamond / ball). • Eliminate any choices that rely on color (red, white, etc.) for day shapes, since day shapes are defined by shape and color (black), not light color.