To predict the actual depth of water using...

Question 1 / 2707066636ee928f7522a1c519e94

Question 1 of 2707066636ee928f7522a1c519e94

To predict the actual depth of water using the Tide Tables, how does one use the number obtained from the Tide Tables?

Question 1 of 27070

To predict the actual depth of water using the Tide Tables, how does one use the number obtained from the Tide Tables?

🔍 Key Concepts

• Tide Tables give the height of the tide above (or below) the chart datum, not the total water depth • Charted depth on the nautical chart is measured from the same chart datum used by the Tide Tables • To get actual depth of water, you must combine the charted depth and the tide height correctly

💭 Think About

• Ask yourself: Does the Tide Table value already include the charted depth, or is it a separate height that must be applied to it? • Think about a low-tide situation: If the Tide Tables show a negative value, what operation with the charted depth would make physical sense? • Consider what units are involved: If both the charted depth and tide height are in feet or meters, which mathematical operation keeps the units as a realistic water depth?

✅ Before You Answer

• Verify that Tide Tables give a height of tide, not total depth • Confirm that the chart datum used on the chart and in the tables is the same reference level • Make sure the final method you choose results in a realistic total water depth in the same units as the charted depth

Question 1 of 27070

To predict the actual depth of water using the Tide Tables, how does one use the number obtained from the Tide Tables?

The number is added to or subtracted from the charted depth

The number is multiplied by the charted depth

The number is the actual depth

The number is divided by the charted depth

Question 1 / 2707066636ee928f7522a1c519e94

Question 1 of 2707066636ee928f7522a1c519e94

To predict the actual depth of water using the Tide Tables, how does one use the number obtained from the Tide Tables?

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Question 1 of 27070

To predict the actual depth of water using the Tide Tables, how does one use the number obtained from the Tide Tables?