Illustration of two arm semaphore with flags (left) and the stationary semaphore alphabet. From the manual 'Practical Aviation for Military Airmen' by James Andrew White (1918). | |
Lizenzart: | Lizenzfrei |
Credit: | Science Photo Library / Photostock-Israel |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |