Tidal Streams Flashcards
Where can you find data on Tidal Streams?
Nautical Almanacs, Pilot books and Tidal Atlasses
What is direction known as?
SET
What is rate known as?
DRIFT
Name one thing which can affect tides?
Weather
Storm Surges
High or Low pressure
Where can you find the direction of the tide on the Tidal Diamonds table?
Next to the time column and at the left of each diamond
Where can you find the rate of the tide on the Tidal Diamonds table?
The column next to the direction column. There are two numbers, the first is the Spring rate and the second smaller number is the Neap rate
True or False?
The ‘tidal hour’ begins from half hour before the time stated and ends half hour after
True
How can you find the direction of the tide (SET) using a Tidal Atlas?
Measure the arrows uses a plotter or protractor
What do thicker arrows mean in Tidal Atlases?
The tide is stronger
What does slack mean?
Not moving
How do you find the rates in a Tidal Atlas?
Two numbers separated by a decimal point, the first smaller number is Neaps and the second is Springs
What do you use for Computation of Rates?
A Computation of Rates graph
What is the first step for course to steer?
Draw a line from A through B and beyond
True or False?
Course to Steer may cut AB before or after B
True
