Even though there may still be snow on the ground, many of us are
anxiously awaiting the coming spring. Thoughts of getting back to the
great outdoors, and back onto the water are surfacing.
Compiled below is a list of transducers and their functions, that may help
you outfit your boat with the latest and greatest in marine technology.
A transducer uses sonar to produce images; by sending out a signal,
bouncing back data, then showing it as a picture. For basic marine
detail, such as fish finding, a single or dual frequency transducer is
sufficient. For oceans or large bodies of water dual beam transducers
are recommended, as they have a stronger frequency and wider angles of
viewing. Factors such as water density (salt or fresh), and depth will
affect the type of frequency needed for best imaging.
A single frequency transducer is ideal for smaller inland lakes and
rivers or shallow coastal /inter-coastal areas, as it is designed for
depths of up to 300 ft. The signal cone angles are narrower on this
type of transducer, typically 12-14 degrees.
Dual frequency transducers were designed for coastal waters as well as
deep, off shore use, as they can penetrate deeper and cover a wider
base. For depths of 500-600 or more, a 45 degree cone angle with a
50KHZ signal is best, as the 50KHZ signal requires the depth to be able
to open up and provide a stronger signal. Units that offer dual
frequency capability can switch between the 50 KHZ and 200 KHZ signals.
Dual beam transducers (also know as dual element) are designed for use
in salt water such as the ocean, as well as shallow and fresh water
environments. These can have varied frequencies and multiple cone
angles. These transducers have individual ceramic elements per beam;
one of the beams transmits while the other receives. Active elements
are chosen for their respective sending or receiving capacities,
providing the transducer with a clearer signal. Dual beam sonar units
are versatile and can show high definition bottom detail using the
narrow 15 degree beam, while offering fish finding capabilities with
the wider 45 degree cone.
Please note that boat speed, wave action, bottom hardness, water
conditions and transducer installation can all affect the depth
capability of any transducer.
To check out our extensive marine accessory list click here GPS City