🔍 Key Concepts

• IALA-B lateral buoyage system used in the United States • Differences between port side (left) and starboard side (right) aids when returning from sea • How daymarks differ from buoys (fixed markers vs floating)

💭 Think About

• Think about what you see on fixed markers on the left side of the channel when you are returning from sea in the U.S. ("red, right, returning" helps with the other side). • Ask yourself which answer choices describe something unique to port side daymarks, not something that applies to both sides or to a different kind of aid. • Consider the usual color, shape, and numbering of port side aids in the IALA-B system and which of those is being asked about in this question.

✅ Before You Answer

• Confirm which color and number pattern is used on the port side when returning from sea in IALA-B. • Check which shapes are standard for port and starboard daymarks and which shape goes with which side. • Eliminate any options that describe features that are not specific to port side daymarks or that apply to other types of aids (like safe water marks or information/regulatory signs).