JRC JLN-650 Doppler Current Meter without Monitor
You can view the current direction and speed in up to 100 layers
with the twist mode. With this advanced feature, an operator is able to
anticipate current speed and direction, enhancing the timing on when to deploy
the nets in the water. Naturally, the twist display mode is accompanied with a
wide range of information, such as current speed range, depth range, temperature
and so on.
Five depth layers
The JLN-650 Doppler current meter allows continuous display of
tidal currents at five depths layers (A,B,C,D,E) simultaneously, of which each
layer is measured in four directions: port ahead, starboard ahead, port astern
and starboard astern. The user can select the depth of each layer, showing
different information. You can also select bearing
1 displayed as
North-up (with true north at the top of the display) and Head-up (with bow at
the top of the display)
Bottom layer auto shift
The bottom layer (E) has the ability to automatically shift and
display the measuring depth according to the ups and downs of the sea bottom.
This is a great source of information for efficient fishing and for the safety
of your nets.
Automatic bottom current tracking
Normally run automatically, the new JLN-650 allows bottom tracking with
depths up to approximately 400 meters
2, measuring direction and speed
relative to the sea bottom. If sea bottom becomes too deep, it automatically
switches to water tracking mode or through GPS mode, depending on user
You can view fish echoes in four-directions, two-directions
ahead, or in any one direction, allowing for easy fish tracking. Just as any
typical fish finder, you can set the display to the type of fish or sea
conditions simply by adjusting the sensitivity.
- Heading input necessary
- Maximum tracking depth may vary according to sea bottom conditions
This Doppler current meter has 15 comprehensive and easily
readable display modes for efficient tidal analysis. With our dedicated keyboard
you can navigate through all common used tasks effortlessly.
The new JLN-650 allows you to carry out all operations simply by
using the keyboard. The layout has a full complement of keys, including direct
STC and GAIN, to adjust noise under surface of the water level and receiver
sensitivity respectively. The keyboard also has one-touch menu keys to access
different display modes instantly as well as a special
to navigate quickly through a variety of menu items on display.
The new Doppler current meter integrates two-way interfacing, allowing you to
easily connect a wide range of additional (NMEA) navigation equipment. Up to
1000 memory points of current and track data can be saved on USB memory.
There are a wide range of alarms available on the JLN-650. With all alarms,
for example, when depth becomes shallower than the parameter set, a warning
message pops up, allowing the operator to take action, contributing to safer
navigation and more efficient fish finding.
Black box configuration
The JLN-650 consist of a display, signal processor and keyboard, allowing for
a flexible installation approach in confined spaces. For those who prefer to
specify their own display, the JLN-650 allows you to choose what type and size
of display to connect to the unit. You can choose between LCD and CRT, as long
as it supports XGA.
JRC's new Doppler current meter operates with a new 125 kHz
transducer, designed to minimize side lobes. The transducer is available with a
stuffing tube, both for iron and FRP hull installations. The standard transducer
cable length of 25 meters can be extended to a maximum of 100 meters. (special
- 1) Measurement depth is 80% or less of depth
- 2) Depths may vary according to sea (and sea bottom) conditions
- 15-inch Display*1
- Signal processor
- Spare parts
*1 Not included in black box configuration