When is a boat considered to be in planing mode?

A boat is considered to be in planing mode when it glides on top of the water with sufficient power. In this mode, the boat reaches a speed where its hull lifts out of the water, reducing drag and allowing for more efficient movement across the water surface. This is typically achieved by applying enough power from the boat’s engine, allowing it to rise up rather than pushing through the water at lower speeds.

When a boat is in planing mode, it experiences a significant increase in performance, including improved speed and fuel efficiency. This is particularly important for powerboats and certain types of recreational vessels designed for faster travel. Understanding planing mode is crucial for safe operation since maneuverability and stability can change significantly at this speed.

The situations described in the other options do not align with the concept of planing. A boat moving slowly beneath the water would not be utilizing its potential speed and power. Stopping for dock maintenance or being anchored in a safe location indicates inactivity rather than the dynamic state of planing.