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Home > Fish Finder > Raymarine Fish Finder & GPS > Raymarine Transducer & Accessory >

Raymarine Thru Hull Transducer








Raymarine RVM-412 Stainless Steel Thru-Hull Pair, 12 Degree Deadrise & 10M Cable
Raymarine RVM-420 Stainless Steel Thru-Hull Pair, 20 Degree Deadrise & 10M Cable
Raymarine RVM-412 Stainless Steel Thru-Hull Pair, 12 Degree Deadrise & 10M Cable

Brand New with Factory Warranty

List Price: $US 2,399.99
Our Price: $US 2,099.00

Raymarine RVM-420 Stainless Steel Thru-Hull Pair, 20 Degree Deadrise & 10M Cable

Brand New with Factory Warranty

List Price: $US 2,399.99
Our Price: $US 2,099.00

Raymarine RVM-400 Thru-Hull Stainless Steel 0 deg For Axiom2, A80704
Raymarine HV-300TH Plastic Transducer Thru-Hull - 6M Cable A80604
Raymarine RVM-400 Thru-Hull Stainless Steel 0 deg For Axiom2, A80704

Brand New with Factory Warranty

List Price: $US 1,604.99
Our Price: $US 1,399.00

Raymarine HV-300TH Plastic Transducer Thru-Hull - 6M Cable A80604

Brand New with Factory Warranty

List Price: $US 434.99
Our Price: $US 399.00

Raymarine HV-300TH Plastic Transducer Thru-Hull Pair - 6M Cable T70448
Raymarine R109 2kw Depth transducer LH-W with temp, CHIRP low-high frequency A80323
Raymarine HV-300TH Plastic Transducer Thru-Hull Pair - 6M Cable T70448

Brand New with Factory Warranty

List Price: $US 759.99
Our Price: $US 699.00

Raymarine R109 2kw Depth transducer LH-W with temp, CHIRP low-high frequency A80323

Brand New with Factory Warranty

List Price: $US 3,699.00
Our Price: $US 3,389.00

Raymarine R509 3kw Depth transducer LH-W with temp, CHIRP low-high frequency A80324
Raymarine A66091 Bronze Thru Hull Transducer 50/200khz with Depth, Temp, Speed ( Replaces E66056 )
Raymarine R509 3kw Depth transducer LH-W with temp, CHIRP low-high frequency A80324

Brand New with Factory Warranty

List Price: $US 5,299.00
Our Price: $US 4,799.00

Raymarine A66091 Bronze Thru Hull Transducer 50/200khz with Depth, Temp, Speed ( Replaces E66056 )

Brand New with Factory Warranty

List Price: $US 479.99
Our Price: $US 439.00

Raymarine A66092 Long Stem Bronze Thru Hull with Fairing Block
Raymarine B164 1Kw 0 Degree Tilted Element 50/200khz Bronze Transducer A102137
Raymarine A66092 Long Stem Bronze Thru Hull with Fairing Block

Brand New with Factory Warranty

List Price: $US 599.99
Our Price: $US 559.00

Raymarine B164 1Kw 0 Degree Tilted Element 50/200khz Bronze Transducer A102137

Brand New with Factory Warranty

List Price: $US 1,199.99
Our Price: $US 1,059.00

Raymarine B164 1Kw 12 Deg Tilted Element 50/200khz Bronze Transducer A102112
Raymarine B164 1Kw 20 Deg Tilted Element 50/200khz Bronze Transducer A102113
Raymarine B164 1Kw 12 Deg Tilted Element 50/200khz Bronze Transducer A102112

Brand New with Factory Warranty

List Price: $US 1,199.99
Our Price: $US 1,059.00

Raymarine B164 1Kw 20 Deg Tilted Element 50/200khz Bronze Transducer A102113

Brand New with Factory Warranty

List Price: $US 1,199.99
Our Price: $US 1,059.00

Raymarine B175H, Bronze Low Profile Transducer, 0 deg Tilt, 1KW, A80044
Raymarine B175H, Bronze Low Profile Transducer, 12 deg Tilt, 1KW, A80047
Raymarine B175H, Bronze Low Profile Transducer, 0 deg Tilt, 1KW, A80044

Brand New with Factory Warranty

List Price: $US 1,399.00
Our Price: $US 1,189.00

Raymarine B175H, Bronze Low Profile Transducer, 12 deg Tilt, 1KW, A80047

Brand New with Factory Warranty

List Price: $US 1,399.00
Our Price: $US 1,189.00

Raymarine B175H, Bronze Low Profile Transducer, 20 deg Tilt, 1KW, A80050
Raymarine B175HW Wide, Bronze Low Profile Transducer, 0 deg Tilt, 1KW, A80319
Raymarine B175H, Bronze Low Profile Transducer, 20 deg Tilt, 1KW, A80050

Brand New with Factory Warranty

List Price: $US 1,399.00
Our Price: $US 1,189.00

Raymarine B175HW Wide, Bronze Low Profile Transducer, 0 deg Tilt, 1KW, A80319

Brand New with Factory Warranty

List Price: $US 1,699.00
Our Price: $US 1,439.00

Raymarine B175HW Wide, Bronze Low Profile Transducer, 12 deg Tilt, 1KW, A80320
Raymarine B175HW Wide, Bronze Low Profile Transducer, 20 deg Tilt, 1KW, A80321
Raymarine B175HW Wide, Bronze Low Profile Transducer, 12 deg Tilt, 1KW, A80320

Brand New with Factory Warranty

List Price: $US 1,699.00
Our Price: $US 1,439.00

Raymarine B175HW Wide, Bronze Low Profile Transducer, 20 deg Tilt, 1KW, A80321

Brand New with Factory Warranty

List Price: $US 1,699.00
Our Price: $US 1,439.00

Raymarine B175L, Bronze Low Profile Transducer, 12 deg Tilt, 1KW, A80045
Raymarine B175L, Bronze Low Profile Transducer, 20 deg Tilt, 1KW, A80048
Raymarine B175L, Bronze Low Profile Transducer, 12 deg Tilt, 1KW, A80045

Brand New with Factory Warranty

List Price: $US 1,799.00
Our Price: $US 1,549.00

Raymarine B175L, Bronze Low Profile Transducer, 20 deg Tilt, 1KW, A80048

Brand New with Factory Warranty

List Price: $US 1,799.00
Our Price: $US 1,549.00

Raymarine B175LH (Low & High Frequency) 0 deg Pair 1KW Thru Hull CHIRP Transducers T70069
Raymarine B175LH (Low & High Frequency) 12 deg Pair 1KW Thru Hull CHIRP Transducers T70072
Raymarine B175LH (Low & High Frequency) 0 deg Pair 1KW Thru Hull CHIRP Transducers T70069

Brand New with Factory Warranty

List Price: $US 2,999.00
Our Price: $US 2,749.00

Raymarine B175LH (Low & High Frequency) 12 deg Pair 1KW Thru Hull CHIRP Transducers T70072

Brand New with Factory Warranty

List Price: $US 2,999.00
Our Price: $US 2,749.00

Raymarine B175LH (Low & High Frequency) 20 deg Pair 1KW Thru Hull CHIRP Transducers T70075
Raymarine B175LM (Low & Medium Frequency) 0 deg Pair 1KW Thru Hull CHIRP Transducers T70070
Raymarine B175LH (Low & High Frequency) 20 deg Pair 1KW Thru Hull CHIRP Transducers T70075

Brand New with Factory Warranty

List Price: $US 2,999.00
Our Price: $US 2,749.00

Raymarine B175LM (Low & Medium Frequency) 0 deg Pair 1KW Thru Hull CHIRP Transducers T70070

Brand New with Factory Warranty

List Price: $US 3,099.00
Our Price: $US 2,799.00

Raymarine B175LM (Low & Medium Frequency) 12 deg Pair 1KW Thru Hull CHIRP Transducers T70073
Raymarine B175LM (Low & Medium Frequency) 20 deg Pair 1KW Thru Hull CHIRP Transducers T70076
Raymarine B175LM (Low & Medium Frequency) 12 deg Pair 1KW Thru Hull CHIRP Transducers T70073

Brand New with Factory Warranty

List Price: $US 3,099.00
Our Price: $US 2,799.00

Raymarine B175LM (Low & Medium Frequency) 20 deg Pair 1KW Thru Hull CHIRP Transducers T70076

Brand New with Factory Warranty

List Price: $US 3,099.00
Our Price: $US 2,799.00

Raymarine B175M (Low & Medium Frequency) Bronze Low Profile Transducer, 0 deg Tilt, 1KW, A80043
Raymarine B175M (Low & Medium Frequency) Bronze Low Profile Transducer, 12 deg Tilt, 1KW, A80046
Raymarine B175M (Low & Medium Frequency) Bronze Low Profile Transducer, 0 deg Tilt, 1KW, A80043

Brand New with Factory Warranty

List Price: $US 1,399.99
Our Price: $US 1,229.00

Raymarine B175M (Low & Medium Frequency) Bronze Low Profile Transducer, 12 deg Tilt, 1KW, A80046

Brand New with Factory Warranty

List Price: $US 1,499.00
Our Price: $US 1,279.00

Raymarine B175M (Low & Medium Frequency) Bronze Low Profile Transducer, 20 deg Tilt, 1KW, A80049
Raymarine B175MH (Medium & High Frequency) 0 deg Pair 1KW Thru Hull CHIRP Transducers T70071
Raymarine B175M (Low & Medium Frequency) Bronze Low Profile Transducer, 20 deg Tilt, 1KW, A80049

Brand New with Factory Warranty

List Price: $US 1,499.00
Our Price: $US 1,279.00

Raymarine B175MH (Medium & High Frequency) 0 deg Pair 1KW Thru Hull CHIRP Transducers T70071

Brand New with Factory Warranty

List Price: $US 2,799.00
Our Price: $US 2,429.00

Raymarine B175MH (Medium & High Frequency) 12 deg Pair 1KW Thru Hull CHIRP Transducers T70074
Raymarine B175MH (Medium & High Frequency) 20 deg Pair 1KW Thru Hull CHIRP Transducers T70077
Raymarine B175MH (Medium & High Frequency) 12 deg Pair 1KW Thru Hull CHIRP Transducers T70074

Brand New with Factory Warranty

List Price: $US 2,799.00
Our Price: $US 2,429.00

Raymarine B175MH (Medium & High Frequency) 20 deg Pair 1KW Thru Hull CHIRP Transducers T70077

Brand New with Factory Warranty

List Price: $US 2,799.00
Our Price: $US 2,429.00

Raymarine B258 1Kw High Performance Thru Hull Transducer with Fairing Block E66082
Raymarine B258 Bronze Thru-Hull 1kW for a,c,e Series A80172
Raymarine B258 1Kw High Performance Thru Hull Transducer with Fairing Block E66082

Brand New with Factory Warranty

List Price: $US 1,275.00
Our Price: $US 959.00

Raymarine B258 Bronze Thru-Hull 1kW for a,c,e Series A80172

Brand New with Factory Warranty

List Price: $US 1,275.00
Our Price: $US 959.00

Raymarine B275LH-W Bronze Thru-Hull - Low & High Wide Frequency A80322
Raymarine B265LH (Low & High Frequency) 1kW Bronze Thru Hull CHIRP Transducer with Temp A80010
Raymarine B275LH-W Bronze Thru-Hull - Low & High Wide Frequency A80322

Brand New with Factory Warranty

List Price: $US 2,499.99
Our Price: $US 2,199.00

Raymarine B265LH (Low & High Frequency) 1kW Bronze Thru Hull CHIRP Transducer with Temp A80010

Brand New with Factory Warranty

List Price: $US 1,699.00
Our Price: $US 1,549.00

Raymarine B265LM (Low & Medium Frequency) 1KW Bronze Thru Hull CHIRP Transducer with Temp A80011
Raymarine B60-12 12 Degree Tilted Element Bronze Thru Hull Transducer E66086
Raymarine B265LM (Low & Medium Frequency) 1KW Bronze Thru Hull CHIRP Transducer with Temp A80011

Brand New with Factory Warranty

List Price: $US 1,949.99
Our Price: $US 1,699.00

Raymarine B60-12 12 Degree Tilted Element Bronze Thru Hull Transducer E66086

Brand New with Factory Warranty

List Price: $US 339.99
Our Price: $US 309.00

Raymarine B60-12 Bronze Thru Hull 12 Degree Tilted Element Transducer for A Series E66088
Raymarine B60-20 20 Degree Tilted Element Bronze Thru Hull Transducer E66085
Raymarine B60-12 Bronze Thru Hull 12 Degree Tilted Element Transducer for A Series E66088

Brand New with Factory Warranty

List Price: $US 339.99
Our Price: $US 309.00

Raymarine B60-20 20 Degree Tilted Element Bronze Thru Hull Transducer E66085

Brand New with Factory Warranty

List Price: $US 339.99
Our Price: $US 309.00

Raymarine B60-20 Bronze Thru Hull 20 Degree Tilted Element Transducer E66087
Raymarine B744V Bronze Thru Hull Transducer 50/200Khz with Depth Speed Temp Sensor For a & New c series A66090
Raymarine B60-20 Bronze Thru Hull 20 Degree Tilted Element Transducer E66087

Brand New with Factory Warranty

List Price: $US 339.99
Our Price: $US 309.00

Raymarine B744V Bronze Thru Hull Transducer 50/200Khz with Depth Speed Temp Sensor For a & New c series A66090

Brand New with Factory Warranty

List Price: $US 544.00
Our Price: $US 429.00

Raymarine B75LH (Low & High Frequency) 0 Deg Pair Thru Hull CHIRP Transducers T70060
Raymarine B75LH (Low & High Frequency) 12 deg Pair Thru Hull CHIRP Transducers T70063
Raymarine B75LH (Low & High Frequency) 0 Deg Pair Thru Hull CHIRP Transducers T70060

Brand New with Factory Warranty

List Price: $US 1,549.99
Our Price: $US 1,469.00

Raymarine B75LH (Low & High Frequency) 12 deg Pair Thru Hull CHIRP Transducers T70063

Brand New with Factory Warranty

List Price: $US 1,549.99
Our Price: $US 1,469.00

Raymarine B75LM (Low & Medium Frequency) 0 deg Pair Thru Hull CHIRP Transducers T70061
Raymarine B75LM (Low & Medium Frequency) 12 deg Pair Thru Hull CHIRP Transducers T70064
Raymarine B75LM (Low & Medium Frequency) 0 deg Pair Thru Hull CHIRP Transducers T70061

Brand New with Factory Warranty

List Price: $US 1,549.99
Our Price: $US 1,469.00

Raymarine B75LM (Low & Medium Frequency) 12 deg Pair Thru Hull CHIRP Transducers T70064

Brand New with Factory Warranty

List Price: $US 1,799.99
Our Price: $US 1,549.00

Raymarine B75MH (Medium & High Frequency) 0 deg Pair Thru Hull CHIRP Transducers T70062
Raymarine B75MH (Medium & High Frequency) 12 deg Pair Thru Hull CHIRP Transducers T70065
Raymarine B75MH (Medium & High Frequency) 0 deg Pair Thru Hull CHIRP Transducers T70062

Brand New with Factory Warranty

List Price: $US 1,799.99
Our Price: $US 1,549.00

Raymarine B75MH (Medium & High Frequency) 12 deg Pair Thru Hull CHIRP Transducers T70065

Brand New with Factory Warranty

List Price: $US 1,799.99
Our Price: $US 1,549.00

Raymarine B75MH (Medium & High Frequency) 20 deg Pair Thru Hull CHIRP Transducers T70068
Raymarine B765LH (Low & High Frequency) 600W Bronze Thru Hull CHIRP Transducer A80014
Raymarine B75MH (Medium & High Frequency) 20 deg Pair Thru Hull CHIRP Transducers T70068

Brand New with Factory Warranty

List Price: $US 1,799.99
Our Price: $US 1,549.00

Raymarine B765LH (Low & High Frequency) 600W Bronze Thru Hull CHIRP Transducer A80014

Brand New with Factory Warranty

List Price: $US 869.00
Our Price: $US 769.00

Raymarine B765LM (Low & Medium Frequency) 600W Bronze Thru Hull CHIRP Transducer A80015
Raymarine Bronze Broadband Ultra-High Performance Thru-Hull with Fairing Block (B260) E66079
Raymarine B765LM (Low & Medium Frequency) 600W Bronze Thru Hull CHIRP Transducer A80015

Brand New with Factory Warranty

List Price: $US 1,199.00
Our Price: $US 979.00

Raymarine Bronze Broadband Ultra-High Performance Thru-Hull with Fairing Block (B260) E66079

Brand New with Factory Warranty

List Price: $US 1,654.99
Our Price: $US 1,459.00

Raymarine R109 external mount, 2KW Low/High Frequency Transducer A80039
Raymarine R109 external mount, 2KW Low/Medium Frequency Transducer A80040
Raymarine R109 external mount, 2KW Low/High Frequency Transducer A80039

Brand New with Factory Warranty

List Price: $US 3,299.00
Our Price: $US 2,999.00

Raymarine R109 external mount, 2KW Low/Medium Frequency Transducer A80040

Brand New with Factory Warranty

List Price: $US 3,299.00
Our Price: $US 3,099.00

Raymarine R509 external mount, 3KW Low/High Frequency Transducer A80210
Raymarine R509 external mount, 3KW Low/Medium Frequency Transducer A80211
Raymarine R509 external mount, 3KW Low/High Frequency Transducer A80210

Brand New with Factory Warranty

List Price: $US 4,499.00
Our Price: $US 4,099.00

Raymarine R509 external mount, 3KW Low/Medium Frequency Transducer A80211

Brand New with Factory Warranty

List Price: $US 4,999.00
Our Price: $US 4,499.00

Raymarine DST800 Nylon Thru Hull Transducer Depth, Temp, Speed A22154
Raymarine E66014 (B117) Low Profile Bronze Depth Thru Hull Transducer
Raymarine DST800 Nylon Thru Hull Transducer Depth, Temp, Speed A22154

Brand New with Factory Warranty

List Price: $US 249.99
Our Price: $US 239.00

Raymarine E66014 (B117) Low Profile Bronze Depth Thru Hull Transducer

Brand New with Factory Warranty

List Price: $US 274.99
Our Price: $US 259.00

Raymarine Low Profile Plastic Depth Only Transducer E66013
Raymarine Nylon Speed/Temp Thru Hull E66071
Raymarine Low Profile Plastic Depth Only Transducer E66013

Brand New with Factory Warranty

List Price: $US 199.00
Our Price: $US 189.00

Raymarine Nylon Speed/Temp Thru Hull E66071

Brand New with Factory Warranty

List Price: $US 289.00
Our Price: $US 259.00

Raymarine P120-ST800 Thru-Hull Speed & Temp Transducer E66071
Raymarine SS164 1Kw 0 Degree Tilted Element Stainless Steel Transducer 50/200khz
Raymarine P120-ST800 Thru-Hull Speed & Temp Transducer E66071

Brand New with Factory Warranty

List Price: $US 289.00
Our Price: $US 259.00

Raymarine SS164 1Kw 0 Degree Tilted Element Stainless Steel Transducer 50/200khz

Brand New with Factory Warranty

List Price: $US 999.00
Our Price: $US 929.00

Raymarine SS164 1Kw 12 Degree Tilted Element Stainless Steel Transducer 50/200khz
Raymarine SS164 1Kw 20 Degree Tilted Element Stainless Steel Transducer 50/200khz
Raymarine SS164 1Kw 12 Degree Tilted Element Stainless Steel Transducer 50/200khz

Brand New with Factory Warranty

List Price: $US 999.00
Our Price: $US 929.00

Raymarine SS164 1Kw 20 Degree Tilted Element Stainless Steel Transducer 50/200khz

Brand New with Factory Warranty

List Price: $US 999.00
Our Price: $US 929.00

Raymarine SS260 1Kw Stainless Steel Transducer with Fairing Block A102122
Raymarine SS60 Stainless Steel Thru Hull Low Profile Transducer with 0 Degree Tilt
Raymarine SS260 1Kw Stainless Steel Transducer with Fairing Block A102122

Brand New with Factory Warranty

List Price: $US 1,667.00
Our Price: $US 1,299.00

Raymarine SS60 Stainless Steel Thru Hull Low Profile Transducer with 0 Degree Tilt

Brand New with Factory Warranty

List Price: $US 549.00
Our Price: $US 389.00

Raymarine SS60 Stainless Steel Thru Hull Low Profile Transducer with 12 Degree Tilt
Raymarine SS60 Stainless Steel Thru Hull Low Profile Transducer with 20 Degree Tilt
Raymarine SS60 Stainless Steel Thru Hull Low Profile Transducer with 12 Degree Tilt

Brand New with Factory Warranty

List Price: $US 549.00
Our Price: $US 389.00

Raymarine SS60 Stainless Steel Thru Hull Low Profile Transducer with 20 Degree Tilt

Brand New with Factory Warranty

List Price: $US 549.00
Our Price: $US 389.00

Raymarine Transducer, RV-312 3D Plastic Thru-Hull, 12 Deg, Pair T70320
Raymarine Transducer, RV-320 3D Plastic Thru-Hull, 20 Deg, Pair T70321
Raymarine Transducer, RV-312 3D Plastic Thru-Hull, 12 Deg, Pair T70320

Brand New with Factory Warranty

List Price: $US 1,924.99
Our Price: $US 1,699.00

Raymarine Transducer, RV-320 3D Plastic Thru-Hull, 20 Deg, Pair T70321

Brand New with Factory Warranty

List Price: $US 1,924.99
Our Price: $US 1,699.00

Raymarine SS264 Stainless Steel Low Profile Transducer, Wide Beam 50Khz, 1Kw, 20 Deg Tilt
Raymarine SS264 Stainless Steel Low Profile Transducer, Wide Beam 50Khz, 1Kw, 12 Deg Tilt
Raymarine SS264 Stainless Steel Low Profile Transducer, Wide Beam 50Khz, 1Kw, 20 Deg Tilt

Brand New with Factory Warranty

List Price: $US 1,694.00
Our Price: $US 1,299.00

Raymarine SS264 Stainless Steel Low Profile Transducer, Wide Beam 50Khz, 1Kw, 12 Deg Tilt

Brand New with Factory Warranty

List Price: $US 1,694.00
Our Price: $US 1,299.00

Raymarine SS264 Stainless Steel Low Profile Transducer, Narrow Beam 200Khz, 1Kw, 20 Deg Tilt
Raymarine SS264 Stainless Steel Low Profile Transducer, Narrow Beam 200Khz, 1Kw, 12 Deg Tilt
Raymarine SS264 Stainless Steel Low Profile Transducer, Narrow Beam 200Khz, 1Kw, 20 Deg Tilt

Brand New with Factory Warranty

List Price: $US 1,376.00
Our Price: $US 1,079.00

Raymarine SS264 Stainless Steel Low Profile Transducer, Narrow Beam 200Khz, 1Kw, 12 Deg Tilt

Brand New with Factory Warranty

List Price: $US 1,376.00
Our Price: $US 1,079.00

Raymarine R409LM-W UltraWide 2KW Through Hull, Low-Medium CHIRP Transducer
Raymarine DST810 Gen2 0 deg Thru Hull E70667
Raymarine R409LM-W UltraWide 2KW Through Hull, Low-Medium CHIRP Transducer

Brand New with Factory Warranty

List Price: $US 5,999.99
Our Price: $US 5,399.00

Raymarine DST810 Gen2 0 deg Thru Hull E70667

Brand New with Factory Warranty

List Price: $US 399.99
Our Price: $US 379.00

Raymarine ST900 Speed/Temp Low Profile Bronze Thru-Hull with 13.7m Cable
Raymarine ST900 Speed/Temp Low Profile Plastic Thru-Hull with 20m Cable
Raymarine ST900 Speed/Temp Low Profile Bronze Thru-Hull with 13.7m Cable

Brand New with Factory Warranty

List Price: $US 329.00
Our Price: $US 299.00

Raymarine ST900 Speed/Temp Low Profile Plastic Thru-Hull with 20m Cable

Brand New with Factory Warranty

List Price: $US 249.00
Our Price: $US 229.00

Raymarine ST900 Speed/Temp Low Profile Plastic Thru-Hull with 13.7m Cable
Raymarine ST900 Speed/Temp Low Profile Plastic Thru-Hull with 13.7m Cable

Brand New with Factory Warranty

List Price: $US 229.00
Our Price: $US 219.00


Raymarine Transducers

Choosing a Transducer

Material

The first step is to determine what material the transducer should be composed of.

  • Plastic housings are recommended for fiberglass or metal hulls.
  • Stainless Steel housings are recommended for steel or aluminium hulls.
  • Bronze housings are recommended for fiberglass or wood hulls.

Bronze is preferable to plastic for wooden hulls because the expansion of wood could damage a plastic transducer and cause a leak. Installation of a stainless steel housing in a metal hull requires an insulating fairing.

A metal housing should NOT be installed in a vessel with a positive ground system.


Mounting Options

How the transducer should be mounted on the boat is also important.

  • Through-hull with fairing blocks offer the best performance, especially at higher speeds.
  • Through-hull flush mounts are best for trailer boats where good performance is required and there are no protrusions from the hull.
  • In-hull transducers do not penetrate the hull, but do sacrifice some performance.

 


Display

Ensure that the transducer you select has the features that you want to see displayed: depth, speed, temperature, or a combination.


Transducer Power

Power refers to the strength with which the transducer sends the sonar "ping", expressed as watts RMS. Higher power increases your chances of getting a return echo in deep water or poor water conditions. It also lets you see better detail, such as bait fish and structure. Generally, the more power you have, the deeper you can reach and the easier it is to separate echoes returning from fish and bottom structure from all the other noises the transducer detects.


Transducer Frequency

The accuracy with which your fishfinder detects bottom and other objects is also determined by the frequency selected for the depth you are viewing. Raymarine depth transducers can be tuned to two different frequencies: 200 kHz (high) or 50kHz (low).

200 kHz (high)

200 kHz works best in water under 200 feet/60 meters and when you need to get an accurate reading while moving at faster speeds. High frequencies give you greater detail to detect very small objects but over a smaller portion of water. High frequencies typically show less noise and fewer undesired echoes while showing better target definition.

 

200 kHz Echo Sounder Display in 50' (15m) of water

50 kHz (low)

For deep water, 50 kHz is preferred. This is because water absorbs sound waves at a slower rate for low frequencies and the signal can travel farther before becoming too weak to use. The beam angle is wider at low frequencies, meaning the outgoing pulse is spread out more and is better suited for viewing a larger area under the boat. However, this also means less target definition and separation and increased susceptibility to noise. Although low frequencies can see deeper, they may not give you a clear picture of the bottom.

Mud, soft sand, and plant life on the bottom absorb and scatter sound waves, resulting in a thicker bottom image. Rock, coral and hard sand reflect the signal easily and produce a thinner bottom display. This is easier to see using the 50 kHz setting, where the bottom returns are wider.

A rule of thumb would be to use the 200 kHz setting for a detailed view to about 200 feet and then switch to 50 kHz when you want to look deeper. Better yet, display both views side-by-side on a split screen for both perspectives.

 

50 kHz Echo Sounder Display in 50' (15m) of water.


Cone Angles

The transducer concentrates the transmitted sound into a beam. In theory, the emitted pulse radiates out like a cone, widening as it travels deeper. In reality, beam shapes vary with the transducer type and typically exhibit "side lobe" patterns. The following figures give a graphic representation of the transducer's actual transmit radiation patterns.

 

Low frequencies have wider beam angles than high frequencies.

For the scope of this discussion, however, the idea of a cone works just fine. The signal is strongest along the centerline of the cone and gradually diminishes as you move away from the center. Wider angles offer a larger view of the bottom, yet sacrifice resolution, since it spreads out the transmitter's power. The narrower cone concentrates the transmitter's power into a smaller viewable area. Cone angles are wider at low frequencies and narrower at high frequencies.

To sum up, a wide cone angle can detect fish around the boat and not just those directly under it while exhibiting less target separation. A narrow cone concentrates the sound output enabling it to better detect small details, such as fish or bottom structure, but only scans a small amount of water at a time.

 

In reality, beam shapes vary with the transducer type and typically exhibit "side lobe" patterns.

Types of Transducers

Transom Mount Transducers

As the name implies, transom mount transducers are installed on the boat's transom, directly in the water and typically sticking a little below the hull. Transom mounts are composed of plastic and tend to be less expensive than other transducers.

Transom mount transducers are recommended for planing hulls of less than 27 feet (8 meters), such as personal watercraft and powerboats with outboard, inboard-outboard and jet drives. They are not recommended for large or twin screw inboard boats because aerated water from the propeller reduces performance. They are also not recommended for operation at very high speeds.

Transom mounts adjust to transom angles from 3° – 16°. For angles greater than 16°, a tapered plastic, wood or metal shim will be needed. However, the transducer should be adjusted so it is angled slightly forward when the boat is in the water.

 

In-Hull Transducers

In-hull (a.k.a. shoot-through) transducers are epoxied directly to the inside of the hull. These are only used in fiberglass hulls. In-hulls will not work with wooden, aluminum, or steel hulls, or in foam sandwich/hulls that have air pockets. Any wood, metal, or foam reinforcement must be removed from the inside of the hull.

With an in-hull transducer, the signal is transmitted and received through the hull of the boat. As a result, there is considerable loss of sonar performance.

In other words, you won't be able to read as deep or detect fish as well with an in-hull transducer as with one that's transom mounted or thru-hull mounted.

Fiberglass hulls are often reinforced in places for added strength. These cored areas contain balsa wood or structural foam, which are poor sound conductors. The transducer will need to be located where the fiberglass is solid and there are no air bubbles trapped in the fiberglass resin. You'll also want to make sure that there is no coring, flotation material, or dead air space sandwiched between the inside skin and the outer skin of the hull.

Advantages
  • No holes drilled in hull
  • Excellent high speed performance
  • No obstructions in the water
  • Low maintenance
Disadvantages
  • Reduced maximuum depth reading
  • Reduced fish detection
  • Can only be used with fibreglass hulls
 

Through-Hull Transducers

Through-hull transducers are mounted through a hole drilled in the bottom of the boat and protrude directly into the water. This type of transducer generally provides the best performance.

Through-hulls are recommended for displacement hulls and boats with straight-shaft inboard engines. You'll also need a fairing block that allows the transducer to be mounted properly. Through-hull transducers must be installed with a fairing to ensure proper alignment and a secure fit.

Through-hull transducers must be positioned in front of the propeller, rudder, keel or anything else that may create turbulence. They must be mounted in a position that is always underwater and angled straight down.

 

Tilted Element Transducers

Tilted Element transducers are mounted through a hole drilled in the bottom of the boat and protrude directly into the water. Tilted Element transducers offer performance similar to through-hulls.

Tilted Element transducers are mounted flush against the hull. Unlike traditional Through-Hull transducers, Tilted Elements do not need a fairing block. The element inside the transducer acts as a leveling agent, working with the deadrise (angle) of your hull to ensure the transducer's beam is directed straight down.

These transducers will generally come in two configurations based on your hull type, a 12º and 20º version. Select a 12º tilt when the deadrise of your hull falls in the 8º to 15º range. Select the 20º tilt if your hull's deadrise is in the 16º to 24º range.

When installing a Tilted Element transducer make sure to position it in front of the propeller, rudder, keel or anything else that may create turbulence. They also must be mounted in a position that is always underwater and angled within the appropriate deadrise range.

 
Featured Products

Raymarine Transom Mount Transducer
Raymarine Transom Mount Transducer


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Raymarine DownVision Transducer


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