U.S. Coast Guard Mobile App
Boating safety laws, requirements and resources; emergency assist button calls USCG
BoatUS
24/7 towing service; weather forecast; small craft advisories; hurricane alerts
MyRadar NOAA Weather Radar
Hi-res, animated weather data around your current location and worldwide
Tidal Chronoscope
Tidal charts, tables, and graphs in wristwatch format; sun and moon positions
MotionX GPS
NOAA marine charts; live position updates; tracks and waypoints recording
Marine Ways
Free nautical charts; route planning; buoy reports and hazards data