Thirds Rule

1 Hours of Tide Cycles

% of Maximum Speed

Current Speed if Maximum Current is 3 Knots

1

1/3

1

2

2/3

2

3

3/3

3

4

3/3

3

5

2/3

2

6

1/3

1

As you can see in the 3rd & 4th hour of the current cycle the speed is the fastest.

We don't mind paddling against the 1st or 6th hour of the current cycle, but don't want to paddle against the 3rd & 4th hours.

Navigation Skills 11
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