Thani,
You will need to go to the Chart Menu, scroll down to Spot Soundings and change it to Visible.
Spot Soundings
Spot Soundings allows you to display or hide spot soundings, which are depth measurements shown on the chart.
NOTE: Spot Soundings are only available with optional-purchase MMC/SD cards.
To change the Spot Soundings setting:
1. Highlight Spot Soundings on the Chart main menu.
2. Use the LEFT or RIGHT 4-WAY Cursor Control keys to change the Spot Soundings setting. (Hidden, Visible, Default = Hidden)