____________ ____________ is a time of no currents and occurs at ...

[notis]

____________ ____________ is a time of no currents and occurs at high and low tides when the current changes
  direction. Fill in the blank(s) with the appropriate word(s).

Question 2

The ____________ current occurs as a tide crest approaches; and a(n) ____________ current occurs as a tide trough
  approaches. Fill in the blank(s) with the appropriate word(s).

[cam1229]

Answer to Question 1

Slack water

Answer to Question 2

flood; ebb

[notis]

Thanks for the timely response, appreciate it

[amcvicar]

Excellent