As part of the cooperation with the infantry there were given out signals from the tank crew. Doing this there was a stick with coloured discs used.
- Green Disc = "Wire Cut" - Red Disc = "Wire Not Cut" - Red Disc over Green Disc = "Have Reached Objective" - White Disc over Red Disc = "Enemy in Dugouts" - 3 Red Discs = "Out of Action"
source: document issued by the commanding officer of 7th Battalion Tank Corps; included in the Battalion War Diary for July 1917 -Haynes Book, p.95/96
Questions: - Are there any other signals (combinations) known? - Do you know pictures showing it? - What might the meassurents of the signalstick be were?