a transverse mercator
projection with tangential coincidence, mostly used as a zone system
(Streifensystem) with 3°- zones. The main meridian (Hauptmeridian) is equidistant.
Germany, former West-Germany: 4 3°-Zones (Zone 2 (6°E), Zone 3 (9°E), Zone 4 (12°E),
Zone 5 (15°E))
on Bessel 1841 former Est-Germany: 2 3°- Zones (Zone 4 (12°E), Zone 5 (15°E)) on Krassowskij