The Norwegian Notices to Mariners (Etterretninger for sjøfarende) and tracings service is offered free of charge on every fourteen days.

All corrections of significant navigational importance and other temporary (T) and preliminary (P) notices regarding sailing in Norwegian waters are announced in the Norwegian Notices to Mariners, Etterretninger for sjøfarende (Efs):

  • New lights and amendments to existing ones
  • Fixed and floating navigation aids
  • Newly identified shallows
  • New or amended submarine cables and pipelines
  • Overhead structures
  • Wrecks or obstacles
  • Light and navaids temporarily out of order
  • Gunnery exercises
  • Information regarding any orders and regulations regarding sailing in certain areas
  • Seismic surveys
  • Planned amendments to lights and aids to navigation, etc.


With tracings the navigators have the opportunity to easily transfer corrections published in the Efs to their nautical charts. For example, a new submarine cable can be traced onto a transparent overlay. In this way the navigator can easily trace the cable onto the chart instead of having to plot a series of coordinates describing the same cable. 

Tracings do not exempt users from reading and appraising all information provided by the Efs. It is necessary for the users to update their charts with information in the Notices.