Understanding Tide Tables

What do tide tables primarily provide information for?

• Weather forecast

• Predicted times and heights of tides

• Sea surface temperature

• Ocean salinity

The vertical difference between consecutive high and low tides is called:

• Depth

• Draft

• Tidal range

• Tidal current

Which type of tide occurs when there are two high tides and two low tides each day?

• Neap tide

• Diurnal tide

• Semi-diurnal tide

• Spring tide

During which phase of the moon do spring tides occur?

• New moon and full moon

• First quarter only

• Last quarter only

• During lunar eclipse

What is a neap tide?

• The highest tide of the month

• The lowest tide of the month

• A tide with the smallest tidal range

• The first tide of the day

Tide tables use which standard to reference heights?

• Mean Sea Level

• Chart Datum

• High Water Level

• Oceanographic Mean

What causes tides?

• Earth's rotation

• Wind patterns

• Gravitational pull of the Moon and Sun

• Underwater volcanoes

The lowest astronomical tide (LAT) is used for:

• Predicting wind speed

• Ship speed calculation

• Chart depth measurements

• Plotting longitude

The difference between predicted and observed tide heights is often caused by:

• Satellite delays

• Atmospheric pressure and wind

• Star alignment

• Ocean temperature

Which publication provides detailed tidal predictions for mariners?

• Admiralty List of Lights

• Tide Tables

• Sailing Directions

• Ocean Atlas