A drawing of a Z 31 EU/SV Anzeiger.
EU: Range rate
SU: Bearing rate
GF: Enemy speed
EF: Own speed
AD: Indicator Drawing: From Padfield. Guns at Sea.
The EU/SV Anzeiger was a German rate solver similar to the British Dumaresq, able to relate the relative motion of two ships to a resultant range rate and deflection.
- Padfield, Peter. (1974) Guns At Sea New York: St. Martin's Press.