Hi everyone,

I've been an Expedition user for several years, and over that time I kept wanting more from the data when I'm on deck — not just seeing the numbers, but understanding what they mean in real time. So I built something.

SailWatchPro is an iOS app (iPad, iPhone, Apple Watch, and Mac) that connects to Expedition Marine over your boat's WiFi. It started as a way to get Expedition data above deck with a touch-friendly interface and two-way controls, but it's grown well beyond that.

Here's what it does on top of Expedition:

Wind & Weather Analytics — Real-time trend analysis using signal processing to identify oscillations, shifts, and building patterns. Confidence indicators and a 6-hour wind history synced across all devices.

Buoy + GRIB Fusion — Automated NOAA/NDBC buoy polling overlaid with parsed GRIB data so you can track predicted vs. actual divergences across your race area.

Coastal Effects — Predicts sea breeze, land breeze, and friction shift likelihood based on your GPS position and live atmospheric data.

HRRR Model Tracking — Monitors hourly forecast revisions and alerts you when the model is drifting from reality.

AI Weather Briefings — Synthesizes boat instruments, buoy data, and model trends into plain-language weather analysis, powered by Claude AI. Updates live as the race progresses.

Tactical Advisories — Continuous monitoring for sail change recommendations, current push, leeway, barometric trends, dew point risk, layline overstand, and more.

Custom Dashboards — 18 fully customizable layouts with any Expedition channel or computed metric (5/10/15-min averages, Polar%, VMG%, VMC%). Context-aware fields auto-switch for upwind/reaching/downwind.

Full Race Management — Pre-start timer suite with line bias, pin pings, course maps, competitor tracking via AIS, and sail/crew change logging.

Apple Watch — Timer, speed, heel, VMG, wind, depth, shallow-water alerts, and man overboard with position tracking.

Everything syncs across all devices on the boat, and controls send commands straight back to Expedition.

I'm currently in limited beta with a small group of competitive boats and looking for more testers — especially anyone racing offshore or doing longer buoy courses where weather shifts and GRIB accuracy really matter.

If you're interested, take a look at sailwatchpro.com and request a beta invite. Happy to answer any questions here.

Jim Bistis