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Learn the Sea

Tidal stream hour ladder

learnthesea.com

Read the stream for each hour either side of HW. Enter the diamond or atlas rates, then interpolate the day’s rate from the range.

Reference port (HW)

Date

HW time

Range / sp–np

Stream by the hour

HourClock timeDirection °TNeap rate (kn)Spring rate (kn)Today (kn)