In addition, the role, scope of practice, and prescribing authorization of a nurse midwife will vary depending on licensure and where they practice. Certified Nurse Midwife responsibilities may include: 1  Primary and specialty care for women.
Messages: 357. Slack tide is when the current goes slack between tide changes and slack usually last 30min to an hour after peak high tide or peak low tide(hence high slack or low slack). Feb 27, 2008.
1 The range of the tide is the difference between the height of high water and the next succeeding or last preceding low water. 2  Semidiurnal. 3  Semidiurnal tide refers to a tide which has a period or cycle of approximately half of one tidal day (about 12.5 hours).