Dual Beam Transom
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 GARMIN GPSMAP 525 GPS Marine Navigation Chartplotter 010 00597 00  US $404.95
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 Humminbird 798ci Hd Si Combo 407970 1 US $924.98
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 Garmin GPSMAP 546s BRAND NEW PN 010 00774 01 US $869.00
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 GARMIN GPSMAP 135 168 178 178C 420s 430s 431s 440s 441s TRANSOM MOUNT TRANSDUCER US $54.95
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 NEW GARMIN OEM TRANSOM MOUNT TRANSDUCER for GPSMAP 546s 720s 740s GSD 20 21 22 US $66.00
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 GARMIN FISHFINDER 160 160C 240 250 250C 300C 320C 340C TRANSOM MOUNT TRANSDUCER US $54.95
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 GARMIN GPSMAP 185 298 398 498 520s 525s 530s 531s 535s TRANSOM MOUNT TRANSDUCER US $54.95
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 GARMIN GPSMAP 188C 238 298 398 TRANSOM MOUNT TRANSDUCER US $66.00
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 GARMIN GPSMAP 441S W TRANSDUCER PN 010 00766 01 US $474.00
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 GARMIN GPSMAP 546 Marine GPS Navigator Chartplotter Fishfinder 010 00774 00 US $733.95
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 Hummingbird 710198 1 Humminbird XNT 9 20 T TM Transducer 83 200 kHz US $65.58
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 GARMIN GPSMAP 440s 441s 541s TRANSOM MOUNT TRANSDUCER US $66.00
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 GARMIN GPSMAP 545s GPS Sonar Chartplotter Navigator Fishfinder 010 00602 00 US $639.95
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 NEW GARMIN OEM TRANSOM MOUNT TRANSDUCER for GPSMAP 530s 531s 535s 540s 541s 545s US $66.00
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 GARMIN GPSMAP 420s 430s 440s TRANSOM MOUNT TRANSDUCER US $54.95
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 GARMIN GPSMAP 531s 535s 536s TRANSOM MOUNT TRANSDUCER US $54.95
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 GARMIN FISHFINDER 100 160 160C TRANSOM MOUNT TRANSDUCER US $54.95
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 Garmin Gpsmap 521s Gps Chart Fishfinder W o Xducer 010 00760 02 US $573.55
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 Humminbird 407970 1 798ci Hd Si Gps Color Fishing System 4079701 US $1,049.99
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 Humminbird 798ci SI Fish Finder 5 Active Matrix US $1,051.96
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 GARMIN GPSMAP 521S GPS CHART FISHFINDER W TM XDUCER 010 00760 01 US $665.92
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 Humminbird 365i Marine GPS Navigator 4quot Grayscale MultiMediaCard US $311.32
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 Humminbird 587ci HD Combo Fish Finder 45quot Active Matrix TFT Color US $518.39
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 Humminbird 798ci SI Fish Finder 5quot Active Matrix TFT Color LCD 4 US $1,059.07
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 Garmin GPSMAP 521S GPS Chartplotter Fishfinder w o Transducer US $577.43
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 Garmin 010 00952 00 Garmin echo 300c Color Dual BM Fishfinder TM Trolling Transd US $232.43
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 GARMIN GPSMAP 536S GPS CHART FISHFINDER DUAL BEAM TM 010 00773 01 US $891.52
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 Interphase U1 200B 00C Interphase SE 200B Sonar Engine w 1TH f 90 Degree Vertica US $2,195.56
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 Hummingbird 407970 1 FISHFINDER 798CI HD SI COMBO Kit US $1,073.77
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 Garmin 010 00955 00 Garmin echo 550c Color Dual BM Fishfinder TM Trolling Transd US $449.03
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 Garmin 010 00953 00 Garmin echo 200 Dual Beam 5 Fishfinder TM Trolling Transduc US $171.77
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 Garmin 010 00760 02 Garmin GPSMAP 521S GPS Chartplotter Fishfinder w o Transduce US $623.30
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 Garmin 010 10249 00 Garmin Dual Beam Plastic Transom Mount Trasducer Kit US $63.07
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 Garmin GPSMAP 531S GPS Dual Beam Combo US $625.95
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 Hummingbird Fishfinder 597Ci HD US $699.99
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 Hummingbird Fishfinder 587Ci HD US $477.42
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 Hummingbird Combo Sonar GPS Color 385I US $449.99
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 Hummingbird 858C Combo Sonar GPS Color US $999.99
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 Hummingbird 788Ci HD Combo Sonar GPS US $1,049.99
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 Hummingbird 798Ci HD Si Combo Sonar GPS US $1,049.99
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 $200 Rebate Garmin GPSMAP 536s GPS FF ChartPlotter Model 010 00773 01 US $914.88
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 GARMIN GPSMAP 521s Chartplotter GPS w XDucer Sounder Fishfinder 010 00760 01 New US $578.95
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 Garmin echo 500C Fishfinder US $349.99
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 Garmin GPSMAP 431 GPS Chartplotter US $404.48
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 Garmin 441s Marine GPS fish finder and fuel flow w warr US $799.99
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 HUMMINBIRD 407970 1 798CI HD SI GPS COLOR FISHING SYSTEM US $1,034.58
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 Hummingbird 385I Combo Sonar Gps Color US $449.99
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 Humminbird Fishfinder Chartplotter 581i Internal GPS Model 407330 1 US $384.88
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 Garmin Transom Trolling Transducer f echo Fishfinders US $53.51
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 GARMIN GPSMAP 521S GPS CHART FISHFINDER W O XDUCER 010 00760 02 US $575.03
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 Raymarine E120w E62223US 12 in display 2 year warr US $3,999.00
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 Raymarine C120W System Pack C120W Display RD418D 10M Cable Model T62291 US $3,049.99
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 Garmin 5 sunlight readable display GPS US $294.20
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 HUMMINBIRD FISHFINDER 587CI HD COMBO 407900 1 US $479.45
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 Garmin GPSMAP 441S Chtplter Combo w o Transducer US $488.99
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 Garmin echo 500c Color Dual BM Fishfinder TM Trolling Transducer US $317.61
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 Humminbird XNT 9 20 T 710198 1 Transom Mount Transducer Design New US $63.99
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 Humminbird 710198 1 Transducer Xnt 9 20 T 7101981 US $74.99
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 Humminbird 7101611 Portable Transducer 710161 1 US $74.99
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 Garmin echo 500c Color Fishfinder TM Trolling Transducer 010 00954 00 US $321.00
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 NIB RAYMARINE DSM300G NETWORK Digital SOUNDER MODULE E63069G F C E G US $619.99
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 NEW HUMMINBIRD 581i COMBO FISHFINDER MARINE GPS With ANTENNA US $349.00
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 Garmin GSD 22 Marine Digital Remote Sonar Sounder GPS GPSMAP GSD22 010 00397 00 US $384.95
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 GARMIN ECHO 200 DUAL BEAM 5 FF TM TROLLING TRANSDUCER US $159.99
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 GARMIN ECHO 100 SINGLE BEAM FF TM TROLLING TRANSDUCER US $81.43
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 GARMIN GPSMAP 535 GPS Marine Navigation Chartplotter 010 00599 00 US $429.95
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 Garmin Gpsmap 441s Gps Chart Fishfinder Combo W Tm 010 00766 01 US $493.98
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 Garmin Gpsmap 536s Gps Chart Fishfinder Dual Beam Tm US $822.95
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 Garmin echo 300c Marine Fishfinder fish finder Sonar 300 watt RMS sounder US $258.99
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 HUMMINBIRD 788CI HD DI COMBO DOWN IMAGING COMBO 408130 1 US $799.99
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 GARMIN GPSMAP 431S GPS CHART FISHFINDER DUAL BEAM T M 010 00765 01 US $462.94
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 Garmin GPSMAP 431S GPS Dual Beam Combo US $447.91
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 Raymarine C120W GPS Receiver US $1,739.99
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 Garmin GPSMAP 431 Ultra Bright GPS Chartplotter US $410.95
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 SI TEX 492 50 200ST Transom Mount Transducer f ES502 492 50 200ST ES US $106.00
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 Garmin Gpsmap 441s Gps Chart Fishfinder Combo W o Xd 010 00766 02 US $458.55
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 Garmin Echo 550C color Fishfinder w Transducer NEW US $396.99
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 HUMMINBIRD FISHFINDER 597CI HD COMBO 407920 1 US $580.41
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 Raymarine C120W Display DSM30 System Pack Model T62290 NV US $2,499.99
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 Raymarine C120W Multifunction Display Pre Loaded w US Coastal Charts E62113 US US $1,999.99
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How to Choose a Fish Finder
Many people ask, “How do I select the proper fish finder for my needs?” There are 5 aspects of a fishfinder to keep in mind when making a purchase.
- The Transducer
There are 2 types of transducers: single frequency and dual frequency. Single frequency is generally best for lakes and shallow coastal fishing. Dual frequency transducers are generally better for deep sea fishing. Dual beam transducers limit the beam size for the high frequency beam so these fish finders are truly best for deep water.
- Power
In general, the higher the power of your fish finder the better. Higher powered fish finders generally cost more so you will have to weigh power with cost. Remember that even in shallow water such as lakes, higher power will still help with better imaging. Most expert fishermen recommend giving the most weight to the power rating of your unit.
- Depth
A fish finder being able to reach greater depths is directly related to the Power and the quality of the transducer. In general, the more expensive models penetrate the water better. Keep in mind while shopping that the depths shown in the product specifications are for clear water. Salt water and murky water will limit the depths the sonar can penetrate. As a general rule of thumb, purchase a fish finder with a depth range about 10% greater than what you intend to fish. Having a slightly greater depth range should help adjust for less than clear water.
- Display Size
Fish finder displays vary from four inches to seven inches (and some larger). Obviously the larger the screen, the higher the cost. The advantage to a larger screen can be ease in seeing the results in bright sunlight.
- Display Resolution
The display resolution pertains to how clear the image is on the fish finder screen. The higher the resolution the better the image will be. Color screens are often better for direct sunlight as they are easier to see. Again, the higher the resolution, the higher the cost, in general.
Now that we’ve covered the basics of how a fish finder works and what the key pieces of fish finders are, let’s offer some suggestions on how to choose the perfect fish finder for you.
Most fishermen recommend doubling whatever you were planning to spend on your fish finder. We leave the amount you wish to spend completely up to you.
Next decide where are you planning to fish the most often- on a lake, along coastal areas or are you mostly a deep sea fisherman? Are you planning to use your fish finder on only one boat or do you want to be able to use it on a friend’s boat? Answering these two questions will let you know if you want a fish finder that works best in shallow or deep water and whether or not you want a fixed mount fish finder or a portable fish finder.
If you want a fixed mount fish finder then you will next need to decide if you want a transom mount transducer or a hull transducer. Transom mount transducer are easier to install and usually less expensive. You can purchase a transom mount transducer in single or dual frequency models. They work best in water that is somewhat calmer and are not terribly effective at much more than 10 knots.
Through hull transducers are the best for clarity and performance, but are harder to install and cost more. You really need to have a need for high speed bottom reading to make them worth the extra cost.
In general if you are going offshore or into deep fresh water, the hull transducer with dual frequency is probably the best bet for accurate fish readings.
If you are using a smaller boat and are not planning to do high speed fish finding then a transom mount or portable fish finder will save you some money and should meet your needs just fine.
About the Author
Karen Janos is an expert on fish finders. When she is not fishing she is the webmaster for http://www.fishfindersdirect.com.