DIN 81208-8
DIN 81208-8 Manoeuvring of ships - Part 8: Zig-zag test/trial (Z-test/trial )
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 10/01/2005
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 10/01/2005