4H2: Electronics: Digital Depth Sounder/Knotmeter/Log
There is a
Raymarine
standard
depth sounder system at the
pilothouse helm on the overhead
electronics panel, with a repeater on
the flybridge and in the master
stateroom. It shows the depth
BELOW THE KEEL
and speed in
knots, trip mileage in nautical miles,
water temperature, etc.
It operates at
200 Hz
(see note below in
Raymarine
graphic depth sounder description below).
Operation of this system is described in its operating manual. It is turned on by the
breaker in the DC power panel.
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!
4H3: Electronics: Depth Sounder - Graphic
This depth sounder (shown by paragraph 4H2 above) works on either of two
frequencies and serves as an accurate fish finder as well. Display is on any of the Raymarine
multipurpose displays.
For full operation instructions, see the unit’s manual.
4H4: Electronics: Depth Sounder - Interphase Forward-Looking
There are two displays for this depth sounder
system, one at each helm. This unit is intuitive in
operation, and the more it is used, the more you will
understand its important role in safe operation of
Hele
Mai.
It shows obstructions forward and to the sides of the
vessel. See its manual for operating and interpreting
details.
Left to right: Wind Direction and Speed; Rudder Position; Depth & Speed
Interphase depth sounder.
Section 4H: Electronics 4.22
