Test Question #2 C

You need to find if the high water or low water is spring or neap. In the Almanac if it is close to the red date then it is a spring tide. Close to a blue date then it is neap. You can also tell because the heights of the tide are higher at spring than neap. Once you determine spring or neap, then on the right side of the secondary port table use the appropriate MHWS or MHWN to get the height correction. In the example you are questioning on April 11 the Low water at 506 UT is a spring low water. Thus subtract 36 minutes. On the right side of the table Under MLWS the correction factor is 0.2m. Thus add it to the Port Frazer 0.5 m on that day to get 0.7m. Your mistakes seem to center around finding if it is neap or spring. January 29th and April 11th are spring. March 20 is in between.