The Garmin Marine Network Adapter Cable Small Male to Large helps anglers connect compatible Garmin BlueNet electronics into a Legacy Garmin Marine Network chartplotter system, making it easier to keep sonar, mapping, and boat control data working together when chasing bass on offshore structure, trolling for walleye, or watching bait and trout over deep water. This adapter converts a compatible device's small Garmin BlueNet network connector to the larger Legacy Garmin Marine Network connector, but it does not replace the required Garmin BlueNet 30 gateway for systems that need one. Converts Garmin BlueNet Network small male connector to Legacy Garmin Marine Network large connector Connects compatible devices to a compatible Garmin chartplotter network Helps integrate boat electronics for sonar, mapping, and navigation setups Does not replace the need for a Garmin BlueNet 30 gateway when required Manufacturer's one-year limited warranty