🔍 Key Concepts

• Standard time meridians used for U.S. coastal tide tables • Relationship between local time zone (Eastern Standard Time) and its central meridian • How the reference meridian is chosen for tide computations in a given harbor

💭 Think About

• What time zone is New York Harbor in, and what is the central meridian for that time zone in degrees west? • How do standard time meridians relate to 15° intervals from the prime meridian (0°) at Greenwich? • Which option best matches the standard time meridian used for areas observing Eastern Standard Time?

✅ Before You Answer

• Confirm which standard time zone New York Harbor uses • Calculate the central meridian for that time zone based on 15° increments from Greenwich • Verify which answer choice matches that central meridian longitude most closely