Using The Course Deviation Indicator (Cdi); Selecting A Split Window - Raymarine DSM25 Owner's Handbook Manual

Chapter 3: Using the Sounder Module 27

Using the Course Deviation Indicator (CDI)

With your display receiving accurate heading and position information, you can
use the CDI to monitor your course and accurately steer to a target waypoint. The
CDI gives a graphical representation of yours boat's course in a 'rolling road'
format. As you travel towards the target waypoint, the checkered pattern and the
waypoint moves down the screen at a rate proportional to your boat's speed.
The steering instructions below the rolling road tell you what correction is needed
to maintain your course and arrive at the target waypoint. Indication arrows are
placed either side of the steering instruction, pointing towards the center line. The
greater the error the more arrows appear. You should correct your course by
steering in the direction indicated by the arrows.
CDI is described in greater detail in the A65 Handbook.

Selecting a Split Window

When the selected page has a split window, the window that is currently active is
bordered in red and the soft key options for that application are displayed.
Pressing the ACTIVE key changes this active highlight to the other window on
that page and its associated soft key labels.