Jabsco 4" 250 CFM Flangemount Blower - 12V [35400-0000] Cartography | Garmin BlueChart Just thread the mounting nut

Just thread the mounting nut and mounting bracket onto the antenna mount

Cable: 45ft cable

The sound waves travel more efficiently though the liquid

GlobalMap 5300C iGPS

Jabsco 4" 250 CFM Flangemount Blower - 12V [35400-0000] Cartography | Garmin BlueChart Just thread the mounting nutFlangemount Blower DC 250 CFM Flangemount 4" Blower Tough Reinforced Plastic Housing Mounts to any flat surface Slip on Inlet Ducting Connection Efficient High Volume Air Flow Low Current Draw Corrosion Resistant Materials Throughout N. M. M. A Type Accepted Meets USCG Regulations 183. 410 and ISO 8846 MARINE for ignition protection Complies with ISO 9097 MARINE VARIATIONS WARNING: This product can expose you to chemicals including NICKEL (METALLIC)