Operational Modes

WARNING! The electronic parts in the Remote Sonar Sensor (RSS) are made to withstand use when casting into water. Because shock from abrupt contact with rocks can damage your RSS, we do NOT recommend using your RSS in water that is less than one foot (0.3 m) deep.

The RSS can be used in two distinct ways:

Sonar Graph: The RSS can be used to create a sonar graph of the bottom. Cast the RSS into the water beyond an area of interest, then reel in the RSS at a slow and steady rate The digital display will provide precise information for bottom con- tour, depth and structure below the RSS. Fish and bait fish will be displayed when detected.

Stationary Float: The RSS can be used as a float in a stationary location to monitor the area below, giving you a live update as fish approach your bait.

Activating the Rod Mounted Display Battery

When you first use the RF20 SmartCast Rod Mounted Display you will need to activate the display battery. Use a coin to remove the battery door on the back of the Rod Mounted Display, then remove the plastic strip located in the battery compartment.

Make sure that the O-ring in the battery compartment is present, positioned correctly in the grooves, and free of debris before re-installing the battery door.

NOTE: Replace the Rod Mounted Display battery only with a 2450 CR-type battery. These batteries can be purchased from most electronics retailers.

NOTE: Under normal use you should expect the life of the display battery to last up to 40 hours of operation. Operation in cold weather will significantly reduce the life of the battery.

Rod Mounted Display
Sleeve Mount	Assembled

Attaching the Rod Mount Display

1.Determine which of the three Sleeves will fit onto your rod. Each Sleeve will fit a variety of rod sizes, but Sleeve A fits rods closest to ¹ " diameter, B fits rods closest to ⁷ " diameter, while C fits rods closest to ³ " diameter.

2.Once you have selected a specific Sleeve, attach it to the Rod Mounted Display, then slip the assembled unit onto your rod and tighten the straps. Make sure that the letter on the Sleeve is visible once the unit is mounted on the rod, so that the Rod Mounted Display and the Sleeve are both on the top side of the rod when you are fishing.

NOTE: You should remove the RF20 from your rod and store it when you are not actively using it. See Maintenance for important storage information.

NOTE: Keep the unused Sleeves in case you get a rod of a different size. If you need a replacement Sleeve, you may order it from our website, www.humminbird.com, or from participating retailers and dealers.

RF20 specifications

The Humminbird RF20 is a robust and versatile fish finder designed for anglers who seek to enhance their fishing experience on both freshwater and saltwater. Known for its advanced technologies and user-friendly features, the RF20 is a standout device in the marketplace.

One of the main features of the Humminbird RF20 is its dual beam sonar capability, which offers a wider coverage area and improved fish detection. Users can select between a narrow beam for precise imaging of underwater structures and a wider beam for covering larger areas. This ability to switch between beam widths makes it easier for anglers to locate fish in various environments.

The RF20 is also equipped with advanced GPS technology, providing accurate location data and mapping capabilities. With high-definition mapping, users can view detailed contours of lakes and rivers, allowing them to plan their fishing strategies effectively. The integrated GPS not only helps in navigating to hotspots but also offers waypoint management, enabling anglers to mark successful fishing spots for future trips.

Another significant characteristic of the Humminbird RF20 is its clarity and resolution. Featuring a vibrant color display, the device presents a clear picture of underwater activities, including the bottom structure, fish, and other relevant objects. The high-resolution screen ensures that users can see detailed information even in bright sunlight.

Durability and water resistance are also key aspects of the RF20. Designed to withstand harsh fishing conditions, it features a rugged housing that protects the device from splashes and moisture. This reliability is crucial for anglers who fish in unpredictable weather and various water conditions.

User-friendly interfaces are another hallmark of the Humminbird RF20. Its intuitive menu system and touchscreen functionality allow anglers to quickly access the desired features without navigating through complicated settings. This ease of use is critical for both novice and experienced anglers who need quick information at their fingertips while out on the water.

In conclusion, the Humminbird RF20 is an exceptional fish finder that combines advanced sonar technology, GPS integration, high-resolution display, and user-friendly features. Designed for durability and performance, it’s an ideal companion for any fishing adventure, enabling anglers to maximize their time on the water and improve their catch rates. Whether for competitive fishing or leisurely outings, the RF20 has the capabilities to elevate any angler's experience.