The image appears to be a navigational chart, specifically a chartplotter or a nautical map. It features various lines and symbols that represent different navigational information such as course, speed, and depth. The chart includes a detailed representation of the sea bed, with various points marked by arrows and other symbols indicating specific locations or routes.

Here is a detailed description:

1. **Course Lines**: There are several lines representing the course of the vessel. These lines are typically used to indicate the direction in which the vessel is moving. The lines are drawn in a straight line and may have arrows pointing in the direction of travel.

2. **Speed Lines**: There are also lines indicating the speed at which the vessel is moving. These lines are also straight and may have arrows pointing in the direction of movement.

3. **Depth Lines**: There are lines indicating the depth of the water. These lines are typically drawn in a straight line and may have arrows pointing in the direction of the water's surface