What does the term slackwater during a tidal change mean?

The term "slackwater" refers to a period during a tidal change when there is little or no movement of water. This phenomenon occurs at the transitions between incoming and outgoing tides, specifically at high tide and low tide. During these moments, the water is essentially at rest before the change of tidal direction, leading to a calm surface and minimal flow. This can be an important consideration for navigation, as slackwater conditions can provide a safer and easier environment for maneuvering vessels. Understanding this concept is crucial for mariners when planning passages and assessing when to transit certain areas safely.