🔍 Key Concepts

• Tidal range and how to calculate high water from low water and range • Using a 6ths (Rule of Twelfths) approach to approximate tidal height at fractional times • Converting "hours and minutes before high water" into how far the tide has already risen

💭 Think About

• First, figure out the predicted height of high water from the given low water height and range. What is that value? • "02h 12m before high water" means the tide has been flooding for how long since low water, given a 6-hour duration? Express that time as a fraction of the full 6-hour rise. • Using the Rule of Twelfths, how many twelfths of the total range should the tide have risen by that fraction of the flood? Multiply that by the range, then add to low water.

✅ Before You Answer

• Be sure the duration of the flood is 6 hours from low to high water; confirm this matches the time used in your fraction. • Carefully convert 2h 12m into a decimal portion of an hour and subtract from the 6-hour duration to find elapsed time since low water. • After finding the rise using twelfths of the range, add it to low water height (0.0 ft) and then compare closely with the multiple-choice answers.