Bridge clearances, water levels, port notes, and notices to mariners — sourced from NOAA, ECCC, and USCG. For captains and companies navigating the Great Lakes and St. Lawrence Seaway.
Every feature below is live in Master's Edition today — no marketing previews, no roadmap fillers.
Search every port across the Great Lakes and St. Lawrence Seaway system — entry procedures, facility lists, contacts, regulations, sailing-direction excerpts.
Air-draft calculations live against the current vessel and draft. Moveable bridges report open clearance when known. 86+ records across 15+ port systems.
NOAA on the US side, Environment and Climate Change Canada on the Canadian side — current readings and forecasts, charted against IGLD 85 datum.
USCG and Canadian Coast Guard live feeds, proximity-filtered to the ports on your route. With links back to the original notice every time.
Your own living guide per port and facility — entry procedures, berth conditions, contacts, draft observations, dated visit history. Photo capture with pen / text / arrow annotation.
Enter every ship you sail — dimensions, mast heights, drafts, contacts — and switch between hulls in one tap. Bridge clearances, drafts, and notes follow the active vessel.
PortIS is for the mariners who depend on knowing their ports — not a generic logistics tool retrofitted for water.
The Master's Edition is available now — a standalone product for independent captains and mariners.
A company platform for shipping operations is in development.
If you're serious about navigation and safety on the Great Lakes, this is built for you.
PortIS was built by a working mariner who spent years moving between ships, always hunting for information from the source — Coast Pilot volumes, government databases, hard-won experience passed between watch keepers. On the Great Lakes, knowing your ports means knowing entry procedures, bridge clearances, berth conditions, and draft restrictions. That information exists, but it's scattered.
PortIS brings it together. One platform, one search, everything you need for a Great Lakes voyage. And when you need the primary source, the link is right there.
Master's Edition is live. Company-platform inquiries, partnership ideas, port-data corrections — every message reaches the founder directly.