01-08 Tides and Currents Flashcards
1
Q
What is high tide?
A
- Water at its highest level
2
Q
What is low tide?
A
- The lowest point when water stops falling.
3
Q
What is the tidal range?
A
- The height difference between a high and low tide.
4
Q
What are tidal rips?
A
- Strong localized, narrow current of water that moves directly away from the shore.
5
Q
What is a neap tide?
A
- The point at which low tides are at their lowest.
6
Q
What is the spring tide?
A
- A high tide that is at its highest.
7
Q
What is the charted depth?
A
- Vertical distance from the tidal datum to the bottom.
8
Q
What does diurnal mean?
A
- Occurring once every 24 hours.
9
Q
What does semi-diurnal mean?
A
- Occurring twice every 24 hours.
10
Q
How does Barometric Pressure affect the tide?
A
- Higher pressure caused the water level to lower and vice versa.
11
Q
What is the tidal current?
A
- Horizontal movement due to the tide.
12
Q
What is ocean Current?
A
- A current occurs due to several factors in the ocean, mostly permanent.
13
Q
What are rotary currents?
A
- Usually, occur in deeper waters where the direction changes through all points of the compass.
14
Q
What is a flood?
A
- Something that overflows normal height.
15
Q
What is an ebb?
A
- Movement of the tidal current away from the shore.
