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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
| Hour | Clock time | Direction °T | Neap rate (kn) | Spring rate (kn) | Today (kn) |
|---|---|---|---|---|---|