🔍 Key Concepts

• Use of the tide tables for Puerto Rosales for the specific date (6 March 1983) • Understanding how to interpolate between high and low water to find a given height (9.0 ft / 2.7 m) • Converting the result to local time with the given Zone Description (ZD +3)

💭 Think About

• First, which two consecutive tidal events on 6 March 1983 bracket a height of 9.0 feet? Are you between a high and a low, or between a low and a high? • Once you identify those two events, how do you proportion the time interval based on how far 9.0 ft is between the two heights (using a method like the Rule of Twelfths or table interpolation)? • After you find the approximate time from the tidal curve, have you checked that it is expressed for the correct time zone (ZD +3) and compared it to the answer choices?

✅ Before You Answer

• Confirm you are using the correct tide station and the correct date from the tide tables • Verify which predicted high and low waters surround 9.0 ft in height and note both their times and heights • Check that your interpolated time is reasonable (falls between the two bracketing times and trends in the correct direction as the tide rises or falls) before matching it to the answer options