Sand Island Tower, 0.9nm SE of (north channel) (PCT1111) Depth: 15 feet
LAT/LON: 46.2578° N 123.9945° W
Note:
Depth is measured below surface.
Subordinate station: only max/slack predictions available.
Reference station:Grays Harbor Entrance (PCT1291).
For predictions of Subordinate stations,
the solid red line depicts a curve fit between the flood, ebb and
slack values and approximates the segments between.