NorthStar 961 Reference Manual page 104

Chapter 4 - Understanding the Chart Screen
Viewing currents
Page 4-12
Chart screen with tide graph and tide station bar
From this point, you can view this tide station's data for
today's date. The tide graph shows current tide level and the
times of high and low tides.
To view past days for a selected tide station, press the LEFT
ARROW key. To view future days, press the RIGHT ARROW
key. Use the CURSOR PAD to choose the day, hour, or minute
selection for the LEFT ARROW and RIGHT ARROW keys.
To cancel the tides view at any time, press the OVERLAY key,
then press the HIDE TIDES key.
For more about the TideTrack function, including how to view
tides anywhere on the CHART screen, see "Understanding the
TideTrack function" starting on page 12-11.
To add current-station information to the CHART screen, press
the OVERLAY key, then press the SHOW CURRENTS key.
961/962 Operations and Reference Manual, Rev. A