FeaturesAI Passage Window Planner

AI Passage Window Planner

Claude finds your optimal departure window.

Analyses your route, departure time, and 5-day forecast to identify the best passage window — and flags weather risks per leg.

AI Passage Window Planner

Overview

Built for the real world.

Claude Sonnet 4.5 analyses your planned route, departure time, and the 5-day forecast to identify the optimal passage window — and flags any weather risks along each leg. Smarter than any weather app.

app.helm-command.com
Tue 06:00
Best Window
Low
Risk
6.5h
Duration
Tue 06:00 — NW 8 kn, 0.5m swellOptimal ✓
Tue 14:00 — NW 22 kn, 1.4m swellCaution
Wed 06:00 — W 12 kn, 0.7m swellGood
Claude reasoning: avoid afternoon thermalSee full analysis

What's included.

Route + Forecast Analysis

Claude analyses your planned route against the 5-day weather forecast per leg. Wind, swell, visibility, and precipitation — all factored into the recommendation.

Claude Sonnet 4.5 analyses route + 5-day forecast per leg
Wind, swell, visibility, and precipitation analysis
Optimal departure window recommended with reasoning
Alternative windows if primary is suboptimal

Weather Risk Flags

Each leg is flagged for weather risk — low, moderate, or high. Know which parts of your route need caution before you leave the dock.

Weather risk flags per waypoint — low, moderate, high
Wind, swell, and visibility risk breakdown
Specific caution notes per leg
Historical accuracy tracking for predictions

Voyage Planning Integration

The passage window planner ties directly into voyage planning. One click from your route to the AI recommendation — no re-entering waypoints or dates.

One click from route planning to AI recommendation
No re-entering waypoints or dates
Recommended window auto-populates voyage plan
Post-voyage feedback improves future recommendations

See AI Passage Window Planner in action.

Book a demo and explore every module. Early access available now.

Book a Demo

We use cookies to keep HELM running smoothly.

Essential cookies are always on. We'd also like to use analytics cookies to understand how you use the platform. Privacy Policy

Talk with Us