Anti-Aircraft Training Instruction. Serial X. Part IV. "Z" Anti-Archraft - Engeland Voorschrift Anti-Aircraft Training Instruction. Serial XI. Part IV. Rocket Anti-Aircraft - Engeland Voorschrift Directions for the use of Anti-Aircraft Artillery Instruments Drill. Pamphlet no. 7. Predictor. 3.7 inch A.A. no. 2, Mark I; 3 inch, 20 CWT. A.A. …