Roffer’s Ocean Fishing Forecasting Service (ROFFS) is fully compatible with Maptech Offshore Navigator. ROFFS provides satellite images and detailed fishing forecast analysis and interpretation. Combined with oceanographic and meteorological data, the service uses surface-temperature images to pinpoint hot spots with navigational coordinates. Maptech’s Offshore Navigator gives fishermen real-time tracking on both their proprietary marine charts and the ROFFS hot spot charts. Maptech’s new Marine Navigator also works with ROFFS charts and uses NOAA digital charts and Contour 3-D charts that depict undersea structure. Maptech, Amesbury, MA; (888) 839-5551; www.maptech.com ROFFS, Miami, FL; (800) 677-7633; www.roffs.com.