Tynningö — Oxdjupet · OpenHelm open-data light study

A decorative chart and light study. NOT FOR NAVIGATION. The chart is an original,
simplified portrayal built only from openly licensed data; it omits features and is not an
official chart product of any hydrographic office.

DATA

Coastline, place names and navigation marks
  © OpenStreetMap contributors. Data available under the Open Database License (ODbL 1.0).
  https://www.openstreetmap.org/copyright

Depth contours and shallow-water stipple
  EMODnet Bathymetry Consortium, EMODnet Digital Bathymetry (DTM), mean depth.
  Licensed under CC BY 4.0. https://emodnet.ec.europa.eu/en/bathymetry
  Resampled and contoured at 6, 10, 20, 30 and 50 m; ~115 m source grid, generalised.

Tynningö light and neighbouring light sectors
  National Geospatial-Intelligence Agency, Pub. 116 List of Lights, Radio Aids and Fog
  Signals — Baltic Sea (US Government work, public domain). Tynningö: C6570.
  https://msi.nga.mil
  NGA does not endorse this work.

THE LIGHT

Tynningö, Oxdjupet channel: Fl(2) WRG 6s, 5 m, nominal range W 6 / R 4 / G 3 M.
The rotating white sweep is an artistic interpretation of the light's period and sectors,
clipped at the first charted land. It does not reproduce the physical optic, brightness
or flash durations.

SOFTWARE

OpenHelm Chart Saver — MIT licence. https://github.com/helmahoy/openhelm
