Your vessel will be docking at Chester, PA,...

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Question 1 of 2066636eea28f7522a1c51b7ad

Your vessel will be docking at Chester, PA, during the evening of 22 April 1983. The chart shows a depth of 20 feet (6.1 meters) at the pier. What will be the depth of water available at 1856 EST (ZD +5)?

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🔍 Key Concepts

• Tide tables for Philadelphia / Delaware River area and how to read daily predictions • Relationship between chart datum (soundings) and predicted height of tide • Using time corrections (time zone, Daylight/Standard time, meridian differences) to find the correct prediction time

💭 Think About

• First, identify which reference station and subordinate station apply to Chester, PA, and what column in the tide table you should be using for 22 April 1983. • Figure out the predicted height of the tide at or nearest to 1856 EST: are you closer to high water, low water, or in between? • Once you know the predicted tidal height above datum at that time, think through how to combine that with the charted depth to get the actual water depth at the pier.

✅ Before You Answer

• Verify whether the 20-foot charted depth is measured relative to Mean Lower Low Water (MLLW) or another datum in the table you are using. • Confirm that 1856 EST (ZD +5) has been converted correctly to the tide table’s reference time, especially if the table uses local standard time or daylight time. • Before choosing an option, add the charted depth and the predicted tidal height carefully, keeping track of feet vs. meters to see which choice is reasonable.

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