Count of Digits

• One digit: general nautical publications
• Two digits: regular charts and maps
• Three digits: reserved
• Four digits (with suffix J): job number made public

The first digit of a three-digit number used to be a modifier prefix to a chart number given in the last two digits. For example, 731 would have identified a version of chart 31 that has restricted circulation because of different content.

Number Series

• 1_ – Brucher Talsperre (nautical charts)
• 3_ – SKGB
• 4_ – Norway
• 6_ – Ølve (nautical charts)
• 8_ – Marienheide

Suffixes in Use

• B – bathymetric chart
• G – reproduction of official chart [“government”]
• J – Job (in lieu of an official publication number; formerly prefix 8xx)
• R – restricted circulation (formerly prefix 7xx)
• T – preliminary / draft edition [“temporary” / “tractandum”]
• V – outline map [“Leerkarte” / “konturkart” / “vacuus”] (outgoing)

This is just an excerpt of the entire list of suffixes prepared by the publisher. These are the ones that are in use.