SeaMate: Marine Navigation

Built by a retired USCG SAR pilot. NOAA charts, no routing caps, honest pricing — now with offline marinas, tidal currents, and logbook photos. 7-day trial.

SeaMate — Built by a Coast Guard SAR Pilot Who's Seen What Goes Wrong

SeaMate was built by a decorated U.S. Coast Guard SAR helicopter pilot who spent his career responding when things went wrong on the water. He knows what you need before you need it — because he's been the one flying out to find you.

SeaMate is the app that didn't exist. Be prepared.

OFFLINE NOAA CHARTS Download your region before you leave the dock. SeaMate is a full offline marine navigation and chartplotter app that works with zero cell service — because the water doesn't care about your signal bars. Full NOAA vector chart coverage: Delaware Bay, Chesapeake, Jersey Shore, New England, Gulf Coast, Great Lakes, West Coast, Hawaii, and Alaska.

AI CAPTAIN Ask anything — tides, weather windows, departure timing, navigation calls. AI Captain isn't a generic chatbot. It reads your live GPS position, your vessel profile, and your actual route to answer with real, current, on-the-water conditions — the closest thing to a second set of eyes in the wheelhouse.

MAYDAY / DISTRESS A MAYDAY script auto-fills with your vessel name and live GPS the second you need it. USCG sector contacts, VHF channel reference, SAR procedures, helicopter signaling guidance, and a direct 911 button — everything that matters when seconds do.

MAN OVERBOARD One tap. Return heading, distance to the mark, elapsed time, and a pre-filled MAYDAY script — instantly, with no fumbling.

ANCHOR WATCH Set your radius. Get alerted the moment you drag. Real-time drift tracking with clear HOLD/DRAG status.

BRIDGE & CABLE CLEARANCE Know your air draft before you commit. SeaMate flags bridge and overhead cable clearances along your route so you're never guessing under way.

TIDAL & CURRENT OVERLAYS Live tide and current data laid right on the chart, so you can see the water moving, not just read a table.

MARINA INFO 4,000+ US marinas with VHF, fuel, and transient dock details — tap any marina icon on the chart.

NDBC BUOY DATA Real-time wave height, period, and water temperature from NOAA buoys near you — the same data professional mariners rely on.

MARINE WEATHER NOAA marine forecasts and a 24-hour wind outlook, current to your exact position — your onboard marine weather radar and tide chart in one place.

ROUTE PLANNING Drop waypoints right on the chart. Distance and bearing calculated for every leg, automatically — nautical route planning built for real boat navigation, not a repurposed road map.

VESSEL PROFILES Save your boat's draft, beam, and air draft once. SeaMate uses it everywhere — clearance warnings, anchor watch, and route planning all built around your actual vessel.

NIGHT MODE Red-shifted display built for real night piloting, so your night vision stays intact at the helm.

SAILING POLARS Live polar performance calculations for your boat — optimal sailing angles and speed targets based on real wind conditions, right on the chart.

FISHING Solunar tables, moon phase ratings, and in-season species by region. Know the best windows before you ever leave the dock.

SHIP'S LOG GPS-stamped, time-stamped entries — your complete captain's log, automatically maintained. Attach photos to any entry, and share a branded voyage recap card.

CHECKLISTS Pre-departure, cast-off, anchoring, and storm prep — built by someone who's actually needed them, not bolted on as an afterthought.

Why SeaMate is different: Every other boating app and chartplotter was designed by engineers who've never had to call in their own position under duress. SeaMate was designed backward — from the emergency, not toward it. Safety features aren't a premium add-on. They're the foundation everything else is built on. Built and maintained by a working aviator, not a faceless company.

SeaMate requires a subscription. 7-day free trial included.

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