Main Features Include: + NOAA Raster Nautical Charts (RNC) + NOAA Electronic Navigational Charts (ENC) + NOAA Weather Map Overlays + Trawl & Non-trawl RCA fishing overlays (West Coast) -- RASTER NAUTICAL CHARTS -- NOAA RNC charts are full-color, geo-referenced, digital images of NOAA paper nautical charts. All maps are available for download. Weekly updates to the RNCs are done on a 'best efforts' basis. The timing of their availability is not guaranteed. Since complete ENC coverage is available in all U.S. waters, vessels required to use ECDIS may NOT navigate with NOAA RNCs. RNCs are approved for use by IMO ECDIS mandated vessels only if adequate ENC data is not available. NOAA RNCs DO NOT meet USCG chart carriage requirements for commercial vessels. The NOAA RNC are intended for navigational use. NOAA RNC are not intended to meet federal chart carriage regulations published in the Code of Federal Regulations. NOAA makes no representations that the RNC Tile Service or the RNC Tiles provided thereunder meet federal chart carriage regulations. Users should consult the Code of Federal Regulations for current federal chart carriage requirements. -- ELECTRONIC NAVIGATION CHARTS -- Electronic Navigational Charts (ENC) are vector data sets that support all types of marine navigation. ENC Charts Include: + Buoys, Beacons, Lights, Fog Signals, Radar + Natural and Man-Made Features + Services and Small Craft Facilities + Seabed, Obstructions, Pipelines + Depths, Currents + Port Features + Traffic Routes + Special areas NOAA updates the ENCs for Notice to Mariners on a weekly basis (timing of their availability is not guaranteed). Although NOAA ENCs are intended for navigational use, the data displayed in this app does NOT meet federal chart carriage regulations for regulated vessels. -- NOAA WEATHER DATA -- + Weather Radar + Sea Surface Temperature + Significant Wave Height + Wind Speed & Direction + Air Temperature + 12-Hour Rain Probability If you have any questions, please email me at email@example.com. Enjoy!