Shape the passage.

Tap the map or choose a sailing place. Waypoints are joined by rhumb-line legs; the planner does not check land, depth or hazards.

Passage name Assumed speed kn

Saved on this device only.

Marine places

Search the starter catalogue

Catalogue data © OpenStreetMap contributors, ODbL. Coverage and details may be incomplete.

Chart context & conditions

EMODnet depth shading2024 modelled DTM, about 115 m cells. Not soundings and not for navigation. GEBCO global terrain2026 global 15 arc-second grid. Coarse/interpolated and explicitly not for safety at sea. NOAA official ENC imageryCurrent chart display service, updated weekly and visible only in US chart coverage. OpenSeaMap seamarksCrowd-sourced aids and marine features; not an official chart. Sailing placesSource-attributed catalogue filtered above.

Wind at map centre

Load when needed; no request is sent until then.

Depth shading: EMODnet Bathymetry DTM 2024, EU, CC BY 4.0. Global terrain: GEBCO 2026 Grid, free with attribution and explicitly not for navigation. US chart imagery: NOAA Chart Display Service. Wind: Open-Meteo model forecast, CC BY 4.0. Tide station markers: TICON-4 via Neaps, CC BY 4.0. Neither is observed pilotage data.

External access
LINZ New Zealand — free official S-63 ENCs require registration and a compatible chart system; CC BY chart-image services require a free LDS key.
Open LINZ ENC service
Licence blocked
UKHO free marine datasets — not loaded because their current terms prohibit use in creating navigational products.
Review UKHO source

Passage points

Waypoints

Add the first waypoint

Tap the map or add a marine place.

Distance—

Time at assumed speed—

Legs0

Import GPX

Tap water to add a waypoint Drag waypoint markers to refine the passage.

Modelled depth shading + general basemap + crowd-sourced seamarks Not a nautical chart