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NAVIGATOR OPERATING MANUAL
NW Explorations
4H2: Electronics: GPS, Depth Sounders, & Electronic Charting
The boat is equipped with a Furuno Radar/GPS/Electronic Charting/Depth Sounder System to make your
location easily identifiable.
4H2A: Electronic Charting
The electronic charting system is not a
substitute for careful study of traditional paper
charts. You are required by maritime law to use
your paper charts for navigation information,
especially since electronic chart technology
does not always permit full cartographic
details to show. The Electronic charts are for
convenience only!
There is a display at the lower helm, with another on the
flybridge. Each Furuno display can show radar, plotter/
chart and depth sounder information; press “Display”
to select the content. You should review the extensive
instruction manual (kept in the lower helm cabinet) for
this entire system in order to utilize it fully.
4H2B: Depth & Speed Indicators
There are two depth sounding systems both of which are at the lower
helm; one at the flybridge.
At the lower helm, there is a Simrad small display which now has
depth indications only. This is separate from the Furuno System, and
is a backup for it.
The Furuno System can serve as a plotter, radar, or depth sounder
by pressing the display key and using the roto- knob to place it in
sounder mode.
Because our waters are sometimes very deep, the depth
sounders will not display or will stay on a high depth reading
when the water’s depth is beyond its capacity.
Remember when backing up, or crossing a “tide line”, that
turbulent water from the tides or boat’s screws (or those of another
boat) can interrupt the sounding information received by the unit.
Be careful!
Note that our Northwest waters are rocky and depths change
rapidly. You should be especially careful to study your charts, and
then check them often whenever running in depths of 50 feet or
less, so that you don’t hit a rock!
Just as our islands “pop up” to heights of 50, 100, or even thousands
of feet in a very small horizontal distance, so do rocky obstacles!
Furuno System in Sounder mode.
The Simrad sounder.
Display in plotter mode.