Searching for NOAA nautical charts to use offline on the water? Nautical Maps puts NOAA's raster charts, electronic charts, and Coast Pilot volumes on your phone, no signal required once they're downloaded.

NEW in 2.0: ENC charts (Early Access, free). NOAA publishes more than 2,000 Electronic Navigational Charts. Download the ones you need and use them offline, with a tap on any point for details on buoys, lights, hazards, soundings and more.

What you get:
* RNC Charts: 1,000+ of NOAA's Raster Nautical Charts, high-resolution and geo-referenced, downloaded once and available fully offline, off-grid, anywhere on the water. Browse and search NOAA's full raster chart catalog by region before you download.
* ENC Charts (NEW, Early Access): NOAA's Electronic Navigational Charts, vector-based, downloaded to your phone and available offline. Tap any point for details. Download by state or by area, see which charts you are missing, and see which downloaded charts are out of date. Your position and heading appear right on the chart. Choose which symbols and lines to show. Night, Dusk and Day chart colours, and Dark Mode.
* Coast Pilot: NOAA Coast Pilot volumes, available to view and download for offline reading, with sailing directions, hazards, and port information the charts alone don't cover.
* Assistance: VHF channel 16, the Coast Guard's distress call steps, your position ready to read out or share, and quick access to U.S. Coast Guard Navigation Center resources and NOAA's online chart viewer for boaters.

T-Satellite is slow and limited, so download your charts before you go: they work with no connection at all. If your phone and plan let apps use T-Satellite data, this app can use it too, with small downloads that ask first. Which phones, plans and apps are supported is decided by T-Mobile, not by this app.

Limited connections: on a satellite connection or with Data Saver on, online use stays limited to small downloads that ask first. RNC charts and Coast Pilot books are too large to download over a satellite connection. Charts you have already downloaded work with no connection at all.

Whether you're planning a coastal passage or need charts on hand with no connectivity, Nautical Maps keeps NOAA's own chart and publication data ready when you need it. ENC Early Access is free for now, and some ENC features may become part of a paid plan later.

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Nautical Maps is an independent app and is not affiliated with, endorsed by, or sponsored by NOAA, the U.S. Coast Guard, or any government agency. It is for planning purposes only and is a supplementary navigation aid. It does not replace official charts or safe navigation: always carry an official, up-to-date means of navigation. Charts can be out of date, phone GPS and compass can be inaccurate, and depths are from past surveys. These ENC charts are not official ENCs. This app is not an emergency service: in an emergency use VHF channel 16 or call 911.

About Electronic Navigational Charts (ENC)
Electronic Navigational Charts are vector data sets supporting all types of marine navigation. Originally built for large commercial vessels using Electronic Chart Display and Information Systems (ECDIS), ENCs are now standard on simpler chart plotters used by recreational boaters too, providing real-time positioning and collision/grounding avoidance.

NOAA ENCs comply with the International Hydrographic Organization's ENC Product Specification and cover more than 2,000 charts across U.S. coastal waters and the Great Lakes. The U.S. Army Corps of Engineers produces the equivalent Inland ENC (IENC) product for many U.S. rivers.

About NOAA Coast Pilot
Coast Pilot volumes are NOAA's official supplement to nautical charts: narrative sailing directions covering channels, dangers, port facilities, and regulations that can't be shown on a chart alone. Nautical Maps lets you download volumes for the regions you need and keep them available offline.

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