Some of DeckWatch's chart layers are built from open data whose licences ask that what is made from it be shared on the same terms. These are the files as the app carries them. Not for navigation: use official charts and publications.
Chart layer · Routeing
Traffic separation schemes
Traffic lanes (drawn in the direction of traffic), separation zones and lines, scheme limits, inshore traffic zones, precautionary areas and areas to be avoided, worldwide.
tss.json
- OpenStreetMap: © OpenStreetMap contributors. The parts from OpenStreetMap, and this file as a database, are available under the Open Database License (ODbL) 1.0. See openstreetmap.org/copyright.
- US waters: NOAA Office of Coast Survey, shipping lanes (public domain), where OpenStreetMap has none. NOAA gives a lane's direction only in its name ("Inbound", "Barnegat to Ambrose"); where it does, DeckWatch adds a line down the lane's middle in that direction, and says so in its note.
- The Turkish Straits: entered from the Türk Boğazları Deniz Trafik Düzeni Yönetmeliği (2019, as amended 2020), Annex 1.
- Off Ra's al Kuh: entered from IMO document MSC 78/26/Add.2, annex 21.
Each part names its source in the file ("s": osm, noaa, or the text it was entered from). Inland waterway markings are left out.
Chart layer · Radio
NAVTEX stations
The NAVTEX stations on 518 kHz: letter, position, NAVAREA, broadcast times and nominal range.
navtex.json
- Source: Wikipedia, List of Navtex stations (the revision named in the file), under CC BY-SA 4.0. This file is an adaptation of it and is offered under the same licence.
Also credited in the app
Other sources
- Coastline: Natural Earth (public domain).
- Depths for suggested routes: NOAA ETOPO 2022 (public domain).
- Ports: NGA World Port Index (public domain).
- Weather along the route: Open-Meteo.com.
- Navigational warnings: each list is credited in the app to the coordinator or national authority that publishes it.