Display Mode, NAV mode, DBS mode, History mode

1.6 Display Mode

The Mode Selector choose the display mode among NAV, DBS (depth below surface), HISTORY, LOGBOOK, OS DATA, HELP, and MENU.

CAUTION

DBS is not a water clearance below keel.

Do not use this mode in shallow waters to avoid grounding.

1.6.1NAV mode

The depth from the transducer to the seabed (bottom clearance) is shown on the screen. Note “BELOW TRANSDUCER” appears at the bottom of the screen in this mode.

Default is,
Color:	Amber
Range:	Automatic range switching
Window:	15 minutes

Shallow depth alarm: 20 m

NOTE: These parameters can be customized to your preference and the last setting is used at a next switch-on. This is true on all other modes.

1.6.2DBS mode

The Depth Below Surface mode provides a draft-adjusted depth reading and will be useful in referencing to the nautical chart. The draft should be adjusted by the DRAFT key according to the actual draft value. If you find any difficulty to check for the draft value, use the NAV mode.

When the DBS mode is selected, the message “Confirm and set ship’s draft to use DBS mode” appears. Confirm ship's draft and set it by referring to section 1.12.

BELOW KEEL (when the draft setting is –10.0 to –0.1) or BELOW SURFACE (when the draft setting is 0 to 30.0) appears at the bottom of the display and the draft value appears at the upper right-hand corner in the DBS mode.

1.6.3HISTORY mode

This mode provides a mix of Contour and Strata displays. The Contour display can be scrolled over the past 24 h while the right side Strata display (layers of different colors according to reverberation strengths) shows the latest sounding for 5 minutes.

Pressing the [+] or [-] key moves the Contour display forwards or backwards, respectively.

HISTORY

		LOGBOOK
HISTORY			OS DATA

	DBS
	DBS			HELP
	NAV		MENU

History of the bottom

If the range scale for both the Contour and Strata display must be the same. If they are not, the message “OUT OF RANGE” appears.

The update of the contour data may take max. one minute. Wait for one minute to display accurate contour if you change the range scale.