PySail — Sailing Route Optimization & Velocity Prediction

Boat Preset:

Hull & Dimensions

Waterline Length (LWL):

ft (11.0 m)

Beam (Width):

ft (3.7 m)

Hull Regime:

Trim & Stability

Heel Angle: 12° ≤ 15° optimal form drag; > 15° increases leeway & induced drag.

Weather Helm: 3° 2°–4° provides optimum keel/rudder lift; outside adds rudder stall.

Close-Hauled Limit (No-Go):

deg TWA

Passage / Polar Efficiency: 80% (Cruising) 100% = Racing crew; 80% = Loaded cruiser; 70% = Conservative ocean voyaging.

Safety Hazard Avoidance

Enforce No-Go Safety Zones

Max Allowed Wind: 30 kt Avoids gale/storm force wind areas at all times.

Max Allowed Waves: 3.5 m (11.5 ft) Avoids severe sea states and wind-against-current steep waves.

Hull Speed 8.04 kt 1.34 × √LWL

Speed Ceiling 8.04 kt Displacement

Righting Factor 1.00 Stability drive

Trim Efficiency 99.8% Heel & Helm

Sailing Polar Diagram (STW vs TWA)

6 kt 10 kt 15 kt 20 kt 25 kt

Route Waypoints

A Starting Location (Departure)

Latitude

Longitude

B Destination (Arrival)

Latitude

Longitude

💡 Tip: Click anywhere on the map or drag the green & red markers to set coordinates.

Ant Colony Optimization (ACO) Settings

Ants / Iteration:

Iterations:

Pheromone (α):

Heuristic (β):

Evaporation (ρ):

Grid Margin (°):

Map Layers: Wind Vectors Ocean Currents Hazard Zones (>Max) ACO Path Pheromone Trails A* Optimum (Valid) Direct Line 24h Day Markers

Algorithm Validation & Performance

Ant Colony (ACO) -- Distance: -- NM

Dijkstra / A* (Exact) -- Distance: -- NM

Optimality Gap -- ACO vs Provable Optimal

Time Saved vs Direct -- Direct GC Path

ACO Colony Convergence Curve

Route Performance & Environmental Profile (Wind, Waves, Boat Speed & Ocean Currents)

Max Boat Speed: -- kt Avg Boat Speed: -- kt Peak Wind: -- kt Peak Waves: -- m Max Current: -- kt Avg Wind: -- kt Avg Waves: -- m

Waypoint Telemetry (Sampled Legs)

Leg #	Lat, Lon	Leg Dist	TWS (kt)	TWA (deg)	STW (kt)	Current Assist	Waves (Hs)	SOG (kt)	Mode	Cum. Time	Cum. Dist
No route calculated yet.