AV Assistant vs Hip Charts

AV Assistant is an informational aid for U.S. waters that shows your location and details on all surrounding aids to navigation (buoys, lights, etc) within your Area of Interest. The app downloads the weekly U.S. Coast Guard Light List for your district, and then shows the aids within your Area of Interest and their details. Any applicable Local Notice for Mariners information is also shown with the light data. For reference use, Nearest Light, also in the App Store, is the better choice. AV Assistant is capable of making reports to the U.S. Coast Guard regarding discrepancies in aids to navigation and is primarily intended for USCG and USCG Auxiliary use. Refer to the website (url in Settings|Reference) for additional information. Warning: AV Assistant, which provides Light List data, is not intended to be used in place of charts or Coast Pilots. Charts should be consulted for the location of all aids to navigation. It may be dangerous to use aids to navigation without reference to charts.

Hip Charts brings NOAA ENC nautical charts to your iPhone—completely free. Pan and zoom the map and official NOAA charts load automatically over Wi‑Fi or cellular. Download chart areas ahead of time for offline use on the water, including custom polygon boundaries. Measure distances right on the chart. Choose how charts look: • Default — NOAA’s standard chart tiles; fast and simple • Customized — adjust depth units, text size, harbor/shoreline structures (breakwaters, piers, docks), routes and marina info, and sharper rendering Need help reading symbols? Open Settings → Chart Legend for NOAA’s official U.S. Chart No. 1. Everything in the app is free. No subscriptions, no paywall. This app does not fulfill chart carriage requirements for regulated commercial vessels under Titles 33 and 44 of the Code of Federal Regulations.