For more information: Weather On Demand by OCENS Our most popular weather data package. A comprehensive maritime weather and ocean resource plus the power of GRIB at your fingertips. For Windows OS systems. Package includes: OCENS WeatherNetTM 12 months Activation $75 Prepaid Virtual Weather DataCard GRIB Explorer Software Available as a download or on CD. Select your preferred Delivery Option from the Available Options menu below. Please note: For Delivery Option "Ship Software CD" we ship FREE via USPS First Class Mail. If you are a Mac user check out MacWxTM - Weather on Demand for OS X