Notices to Mariners (Efs)

The Etterretninger for sjøfarende (Efs) is published twice a month, and provides information on changes or defects in aids to navigation, discovery of new dangers and on shortcomings in Norwegian charts or publications, navigational warnings, gunnery exercises or other information of interest to mariners. In addition to temporary (T) and preliminary (P) notices in Norwegian waters.

Miscellaneous Notices to Mariners

Gunnery Exercises and Miscellaneous Notices

A total of 11 miscellaneous notices are published in the Efs 18/2021 (pdf). These notices are only available in the pdf edition of Efs will not appear in the search for notices to mariners and tracings.

Rig List Download the rig list as a pdf and in KLM format

The table quantities shows positions for mobile units in the Barents Sea, the Norwegian Sea and the North Sea north of 55° N and east of 05° W. During moves/relocation all the rig's height are approximately 120 meters above the sea surface.

Rig list (pdf)

Rig list (KLM)

Changes are reported by e-mail to


Contribution of Nautical Information

Corrections and changes in Norwegian nautical charts should be reported to the Efs, for example establishment and adjustments of installations at sea.

Tracings for Norwegian Charts

Tracings are supplements to the Efs notice, and are meant to aid the mariner when correcting charts. You'll find the tracings by searching in the Efs service and in the Efs pdf archive.