Waves, Currents, Tides

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Across
  1. 2. Two high and low tides in one day
  2. 4. One high and low tide a day
  3. 5. Spring tide on crack
  4. 6. Top of the wave
  5. 7. Occurs on the west coast
  6. 9. Bottom of the wave
Down
  1. 1. Water is incoming
  2. 2. When the sun, moon and earth are all aligned
  3. 3. Area between crest and crest
  4. 8. Water is outgoing