An in-hull transducer does not create drag or generate turbulence but is subject to interference from turbulence from other sources. You should test potential locations before mounting. Hull features are an important factor with this transducer type (Hull Features and Your In-Hull Transducer). General considerations include the following.

• If installed over solid fiberglass with smooth water beneath the mounting area, the in-hull transducer type works well with any engine type.

• An in-hull transducer can be installed while the boat is in the water.

• Since air interferes with the transducer signal, do not allow bubbles or voids to form in the mounting adhesive under the device.

• You should test possible placement locations while the boat is moving at low and high speeds, while checking depth readings, and use tape or a grease pencil to mark locations with the strongest signal.

  For information on how to test placement before mounting, check your transducer installation instructions or go to support.garmin.com.