🔍 Key Concepts

• Western Rivers Aids to Navigation System characteristics • Meaning of right descending bank in river terminology • Numbering and coloring rules for lateral daymarks on rivers

💭 Think About

• First, picture yourself looking downstream on a Western River. Which side is the right descending bank, and how are aids on that side generally marked? • Think about the standard relationship between color and numbering for lateral marks: which color is normally paired with odd numbers, and which with even, in river systems? • Consider whether special functions like gage readings or yellow markings are normal requirements for all daymarks, or if those are for specific special-purpose aids only.

✅ Before You Answer

• Confirm which color and number pattern is used on the right descending bank under the Western Rivers system • Verify whether yellow retro-reflective markings are a general requirement, or only for certain special-purpose aids • Check if river gage indicators are separate aids from standard lateral daymarks or an inherent feature of all right-bank daymarks