Anchor AlarmUS Inland Rivers & Great Loop charts — built for how you actually cruise
The Great Loop's rivers — Mississippi, Ohio, Tennessee — with locks, dams and survey-grade soundings.
Popular sailing destinations
Where this region's sailors actually drop anchor.
The Tennessee River
The prettiest leg of the Loop — Pickwick, the Tenn-Tom, and easy lock days.
The Mississippi
The big-water descent past St. Louis — current, tows, and few stops.
The Illinois Waterway
Chicago to the Mississippi — the Loop's industrial gateway, lock by lock.
The Cumberland & Kentucky Lakes
Green Turtle Bay and the lakes that make the rivers feel like cruising.
Popular harbours & anchorages
A few of the spots US Inland Rivers sailors cruise — all charted in the pack.
- Joe Wheeler
- Pickwick
- The Tenn-Tom
- Green Turtle Bay
- Grafton
- Alton
- Chicago
- Ottawa
- Paducah
- Chattanooga
- Knoxville
Cruising US Inland Rivers
America's Great Loop runs through a river system no coastal chart covers: the Mississippi, Ohio, Tennessee, Cumberland and the Illinois Waterway, threaded with locks, dams, and a barge traffic culture all its own. This region uses survey-grade inland ENC, with the locks, dams, fixed-bridge clearances and dredged channels that Loopers actually need — the one chart set built for the rivers, not adapted from the sea.
What’s inside the US Inland Rivers pack
Every layer our chart pipeline bakes for this region — yours for $14.99/year.
Nautica Day & Night charts
S-52 vector cartography styled for daylight and night watches.
Depth-aware routing
Route planning that respects your draft and the charted depths.
Seabed & holding
Charted seabed type and holding quality from S-57 substrate — know what you’re anchoring into.
Soundings & depth contours
Spot depths and contours across the whole region.
Tides & currents
Tidal heights and streams, bundled in.
Rocks, wrecks & hazards
Charted obstructions so you can plan a clean approach.
Harbours & anchorages
Marinas, harbours and anchorages along the coast.
Lights, buoys & beacons
Charted navaids with their light characteristics.
Fully offline
Download once over wifi; navigate with no signal.
Sources & accuracy
The US Inland Rivers pack is built from USACE inland ENC (survey-grade), fused with community-verified rocks, wrecks and navaids. US Army Corps of Engineers inland ENC · © OpenStreetMap contributors (ODbL)
- Survey-grade ENC
- 848 × 960 NM
- 920 MB
Charted by the United States government.
The US Inland Rivers pack is built from the official Inland ENC of the US Army Corps of Engineers — the federal government's own survey of the navigable river system — packed to work with no signal.
- USACE Inland ENC
- Official S-57 source
- Public domain
The source, not a copy
NOAA and USACE publish their charts as S-57 ENC cells. Our pipeline parses those cells directly, so depth areas, soundings, wrecks, rocks, channels and aids to navigation arrive as the hydrographers surveyed them — never traced off an image.
The rivers, charted end to end
The US Inland Rivers pack is built from 109 USACE Inland ENC charts covering the Mississippi, Ohio, Tennessee and Illinois systems — locks, dams and bridge clearances included. The Great Loop, on charts made for it.
Public data, honest price
US government charts are public domain and carry no licence fee. That is why a US region is $14.99 a year flat — charts, depth-aware routing, tides and seabed included — instead of a chart licence billed on top of the app.
Government-charted regions
Source data: NOAA Office of Coast Survey and the US Army Corps of Engineers, in the public domain. AnchorQueen is an independent product, not affiliated with, endorsed by or certified by NOAA, USACE or any US government agency. Region packs are derived charts for situational awareness and do not replace the official charts a vessel is required to carry.
Anchoring in US Inland Rivers
AnchorQueen is an anchor-watch app first. Every US Inland Rivers chart carries seabed type and holding quality from official survey data, so you read the bottom before you drop the hook — then the anchor alarm watches your swing while you sleep.
Auto-renewing, billed securely through your App Store account — no card forms, no separate logins. Cancel anytime.
On iPhone and iPad now — Android coming soon.
Cruising the whole app? Pro includes one region; Max includes three.
Questions
Why a separate chart for the rivers?
Coastal charts don't cover the inland river system. This uses survey-grade inland ENC with the locks, dams and fixed-bridge clearances the Great Loop needs.
Are locks and dams shown?
Yes — locks, dams, dredged channels and bridge clearances from the inland ENC are included, with depth-aware routing for the river depths.
Does it cover the whole Great Loop river section?
It covers the inland river leg — Mississippi, Ohio, Tennessee, Cumberland and the Illinois Waterway. Pair it with the US East Coast & ICW region for the coastal half of the Loop.