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Sonar transducers can be used to detect fish, bottom structures and the sea/riverbed topography. They can record the depth and temperature of the water, the speed of the boat and can generally aid in navigation by rendering images of what's below the boat. Transducers are available in transom mount, in-hull, or through hull, and tilted element configurations. They come in plastic composite, bronze, or stainless steel to fit practically any boat on the water. In-hull transducers transmit and receive signals through the hull of the boat, which results in a loss of sonar performance compared to a wet transducer solution. This means that 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. Side Imaging technology generally works best in speeds under 10 MPH, but this will vary depending on the boat hull and the location of the installation.
| Characteristics | Values |
|---|---|
| Will 2D sonar work through a boat hull? | Yes, but only with a single layer fiberglass hull boat. |
| What type of transducer is required? | Transom 2D transducer. |
| What is the impact of boat speed? | 2D sonar works best at speeds under 10 MPH. |
| What is the impact of hull material? | Fiberglass hulls are poor sound conductors, so the transducer must be located where the fiberglass is solid and there are no air bubbles trapped in the fiberglass resin. |
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What You'll Learn
- Sonar transducers can be used to detect fish, bottom structures and the sea/riverbed topography
- Sonar transducers can record the depth and temperature of the water, the speed of the boat and can generally aid in navigation
- Sonar transducers come in transom mount, in-hull, or through hull, and tilted element configurations
- Sonar transducers are available in plastic composite, bronze, or stainless steel
- Side Imaging technology generally works best in speeds under 10 MPH
Sonar transducers can be used to detect fish, bottom structures and the sea/riverbed topography
With an in-hull transducer, the signal is transmitted and received through the hull of the boat. As a result, there is a loss of sonar performance compared to a “wet” transducer solution. 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. This solution will only work when shooting through the hull of a single layer fibreglass hull boat.
Side Imaging technology generally works best in speeds under 10 MPH. This will vary depending on the boat hull and the location of the installation. Compact Side Imaging transducers like those that come with the HELIX 5 CHIRP SI GPS G2, and HELIX 7 CHIRP SI GPS G2 are more conducive to faster speeds due to their smaller size. While the 2D sonar element built into the Side Imaging transducer may operate at higher speeds than the side imaging elements, depth and bottom readings with the transom-mounted HDSI, MEGA SI and MEGA SI+ transducers are greatly impacted by the turbulence generated due to their size.
Depending on the transducer, Panoptix Forward technology combines a three-dimensional forward view (RealVü 3D Forward) with fish finder data, a fish finder forward view (LiveVü Forward) with which you can see the fish in front of you and a pure 2D forward view (FrontVü) with a range of 90 meters (300 feet).
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Sonar transducers can record the depth and temperature of the water, the speed of the boat and can generally aid in navigation
In-hull transducers transmit and receive signals through the hull of the boat, which results in a loss of sonar performance compared to a "wet" transducer solution. This means that 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. In-hull transducers are also impacted by the materials used to reinforce the hull for added strength, such as balsa wood or structural foam, which are poor sound conductors.
Side Imaging technology generally works best at speeds under 10 MPH, although this will vary depending on the boat hull and the location of the installation. Compact Side Imaging transducers are more conducive to faster speeds due to their smaller size. While the 2D sonar element built into the Side Imaging transducer may operate at higher speeds than the side imaging elements, depth and bottom readings with transom-mounted HDSI, MEGA SI and MEGA SI+ transducers are greatly impacted by the turbulence generated due to their size.
Panoptix Forward technology combines a three-dimensional forward view with fish finder data, a fish finder forward view, and a pure 2D forward view with a range of 90 meters. Panoptix Down provides a real-time fish finder view, a 3D view of the bottom structure under your boat, and a 3D gradient view of the bottom structure along your route.
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Sonar transducers come in transom mount, in-hull, or through hull, and tilted element configurations
Sonar transducers come in transom mount, in-hull, or through-hull, and tilted element configurations. They are available in plastic composite, bronze, or stainless steel to fit practically any boat on the boat. Transom-mounted transducers are suitable for aluminium boats, while in-hull transducers are suitable for single-layer fibreglass hull boats. However, in-hull transducers suffer from a loss of performance compared to "wet" transducer solutions, as they cannot read as deep or detect fish as well. This is because fibreglass hulls are often reinforced with balsa wood or structural foam, which are poor sound conductors.
Side Imaging technology works best at speeds under 10 mph, although this varies depending on the boat hull and the location of the installation. Compact Side Imaging transducers are more conducive to faster speeds due to their smaller size. While the 2D sonar element built into the Side Imaging transducer may operate at higher speeds than the side imaging elements, depth and bottom readings with the transom-mounted HDSI, MEGA SI and MEGA SI+ transducers are greatly impacted by the turbulence generated due to their size.
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Sonar transducers are available in plastic composite, bronze, or stainless steel
The type of transducer you need depends on the type of boat you have. For example, plastic thru-hull housings should not be used on wooden boats, as the wood will swell and crack the housing. Similarly, bronze thru-hull housings should not be used on aluminium boats.
Transducers are available in transom mount, in-hull, or through hull, and tilted element configurations. Transom-mount transducers are usually mounted to starboard, as this is typically the side where the propeller blades are moving downward. The upwash from the propeller blades causes bubbles and turbulence. In-hull transducers, on the other hand, will result in a loss of sonar performance compared to a "wet" transducer solution. This is because the signal is transmitted and received through the hull of the boat, and you won't be able to read as deep or detect fish as well.
If you have a single layer fibreglass hull boat, you can use a 2D sonar transducer. However, it's important to note that the performance of the transducer will depend on the speed of the boat, with Side Imaging technology generally working best at speeds under 10 MPH.
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Side Imaging technology generally works best in speeds under 10 MPH
Side Imaging technology generally works best at speeds under 10 mph. This will vary depending on the boat hull and the location of the installation. Compact Side Imaging transducers like those that come with the HELIX 5 CHIRP SI GPS G2, and HELIX 7 CHIRP SI GPS G2 are more conducive to faster speeds due to their smaller size. While the 2D sonar element built into the Side Imaging transducer may operate at higher speeds than the side imaging elements, depth and bottom readings with the transom-mounted HDSI, MEGA SI and MEGA SI+ transducers are greatly impacted by the turbulence generated due to their size.
Sonar transducers can be used to detect fish, bottom structures and the sea/riverbed topography. They can record the depth and temperature of the water, the speed of the boat and can generally aid in navigation by rendering images of what's below the boat. Transducers are available in transom mount, in-hull, or through hull, and tilted element configurations. They come in plastic composite, bronze, or stainless steel to fit practically any boat on the water.
With an in-hull transducer, the signal is transmitted and received through the hull of the boat. As a result, there is a loss of sonar performance compared to a "wet" transducer solution. 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.
This solution will only work when shooting through the hull of a single layer fiberglass hull boat.
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Frequently asked questions
Yes, 2D sonar can work through a boat hull, but it depends on the type of hull and the location of the installation.
Single layer fiberglass hulls are best for 2D sonar.
The 2D sonar should be installed where the fiberglass is solid and there are no air bubbles trapped in the fiberglass resin.
With an in-hull transducer, the signal is transmitted and received through the hull of the boat. This results in a loss of sonar performance compared to a "wet" transducer solution.
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.
