🔍 Key Concepts

• Tidal current tables for 1983 and how to use subordinate stations like Coxsackie, NY • How to apply time and velocity differences from the reference station to the subordinate station • Reading the daily current predictions correctly for the given date and local time (EST, ZD +5)

💭 Think About

• Which reference station is associated with Coxsackie, NY, and what are the listed time and velocity differences for maximum flood/ebb and slack water? • Once you find the times and rates of maximum currents for that day, where does 0945 EST fall in relation to the nearest slack or maximum, and what does that imply about the current’s strength? • Are you interpolating correctly between known times and velocities, and keeping track of whether the current is increasing or decreasing?

✅ Before You Answer

• Verify you are using the correct year (1983) and the correct volume of the Tidal Current Tables • Confirm that you’ve converted or used 0945 EST (ZD +5) consistently with the table times (no mix‑up with GMT/UT or daylight time) • Double‑check the interpolation steps: time interval, fraction of the interval, and how that fraction changes the current velocity from slack toward maximum or vice versa