Furuno GP-3300 - Manual (Page 17)

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1.8 Selecting Screen Center by Cursor Position
In normal usage your ship is at the screen center. This function is
only available with FURUNO chart cards.
If you want to select a land feature as the screen center, do the follow-
ing:
1. Display the cursor (if it is not already displayed) by pressing the
[CURSOR ON/OFF] key.
2. Operate the trackball to place cursor on position desired.
3. Press the [CENTER] key.
CENTER
Figure 1-8 How to select screen center