NorthStar 961 Reference Manual page 103

Chapter 4 - Understanding the Chart Screen
Chart screen with tide stations and station coverage bar
Tide stations—if stations are in your vessel's area—are displayed
on the CHART screen, and a STATION COVERAGE bar
(replacing an INFO BAR) at the bottom of the screen shows
today's date and the number of stations in the coverage area. If
the STATION COVERAGE bar says there aren't any stations in
the coverage area, press the OUT key to zoom out to a wider
coverage area (the GRAPH ON key will appear); if there are too
many stations, zoom in.
To select the tide station nearest to your vessel (or to the
cursor, if you've already pressed the CURSOR PAD) and
graphically view this station's tide data, press the GRAPH ON
key.
961/962 Operations and Reference Manual, Rev. A Page 4-11