Did you recognize the above as a
TIDAL ADJUSTMENT TABLE ??

If NOT you should enrole in the Squadron's Piloting and Advanced Piloting courses. Contact SEO AL Swanson.P (541)888-6178 for details. Learn about tides and currents and predicted stage at any time or place.

The predictions given in the monthly tables are for the OSU Hatfield Marine Science Center Dock in South Beach, Yaquina Bay. Tides for locations north of South Beach generally occur later (add time) and tides for locations south of South Beach generally occur earlier (subtract) than the tides given in the tables. Corrections for tidal heights are now given in ratios. The times of high/low water up river or up bay occur later than the times at the harbor entrance. 
Adjustments
To estimate the high tide for a particular location, add the high minutes to the South Beach predicted high time from the monthly table. If the time is negative, subtract the indicated number of minutes. To estimate the low tide for a particular location, add the low minutes to the South Beach low time. To find the estimated tidal height, multiply the South Beach predicted high height by the indicated high ratio and the South Beach low height by the indicated low ratio. Example
The find the estimated high tide at Taft, add 7 minutes to the South Beach time and multiply the predicted high tide height by the ratio of 0.76. To find the estimated low tide at Taft, add 39 minutes to the South Beach time and multiply the predicted low tide by the ratio of 0.68.

Tide Tables are predictions and are least accurate during storms and extreme high and low tide periods.
The Tide tables can be accessed through the "Bar Contidions" page on the CBPS website.