A locks and bridges directory for the Great Loop, kept with your trip
Dimensions, VHF channels and the source for each entry, laid out along your route — a starting point you check against current notices before you rely on it.
On a river day, the lock is the schedule. Whether you arrive at 4:40 and lock through at 5:00 or wait until tomorrow depends on how that lock runs, and that is rarely in the same place as your route.
AFTWISE ships a starter directory of 203 locks and bridges for the Great Loop and inland waterways, with each entry’s published VHF channel and clearance and the source named. It is part of the Aftwise Cruiser plan and above.
What each entry carries
- Dimensions and clearances as published, with the source named for each entry
- VHF channel and contact for calling before you arrive
- Service patterns — on demand, every thirty minutes, on the hour, a repeating interval, a scheduled opening, or by reservation — so you know when you can lock through
- Filter by waterway, such as the Champlain Canal
Sequenced along the route
- Locks and bridges in order along a planned trip
- Timing entries recorded as you pass, which is how you learn what your boat does on that river
- Share as text with whoever is meeting you at the next marina
- Offline — the directory is on the device, so it works where there is little signal
The directory is a starting point. Lock hours, closures and clearances change: confirm them with the current notices from the lock or bridge operator and the authority that publishes them. AFTWISE is a recordkeeping tool, not a navigation aid.
Questions about the locks and bridges directory
Is there a locks and bridges directory for the Great Loop?
Yes. AFTWISE includes a starter directory of 203 locks and bridges for the Great Loop and inland waterways, with published VHF channels and clearances and the source named for each entry. It is on the Aftwise Cruiser plan and above.
Is the information current?
It is a starting point built from published sources, and each entry names its source. Hours, closures and clearances change, so check current notices from the operator before you plan around an entry.
Does it work without a signal?
Yes. The directory is stored on your device.
Can I share a lock list with another boat?
Yes. You can share structures as text with someone meeting you at the next marina.
Is AFTWISE a navigation app?
No. It is not a chartplotter and does not replace charts or navigation equipment. It keeps your records and your lock and bridge notes beside your trip.
See the directory along your own route
