Signals Collection - US Army Visual

Flags
MC-44	semaphore, 18" square, divided diagonally into red and white portions.
MC- 113	semaphore flag kit containing two MC-44's
M-238	set of coloured flags for signalling between tanks.


Panels and panel sets
cotton cloth strips variously coloured to identify ground areas and units for friendly planes
AL-119, 120 etc	square or rectangular, for aerial liaison.
AP-30-A and C	in dark colours, for use on snow or light backgrounds.
AP-30-B and D	in light colours, for use on normal backgrounds.
AP-33 and 34	for signals to high flying planes.
AP-50	large panels (2 x 12 ft) in white, yellow, and red (the last two colours being brilliantly fluorescent).


Lamps, Signal
to transmit blinker code by night or day
EE-80-A	12-inch lamp and tripod signalling by white, red, or green flashes using commercial 115-volt alternating current or direct current, range up to 12-14 miles. heavy (194 pounds)
EE-84	portable searchlight-type set operating on dry cell batteries with range up to 5,000 yards in sunlight, far greater at night; white or red flashes. (42 pounds)
SE-11	highly portable, flashlight-type, aimed like a gun with trigger key, daylight range 1,000-2,000 yards using red filter. (7-8 pounds)


Lamps, Identification
enabling planes to identify friendly ground vehicles and installations
AN/VVX- 1	delivering intermittent flashes visible in bright sunlight three miles aloft or a mile or more along the ground.
AN/PVX-1	similar to AN/VVX-1 but portable, operating on self-contained battery to mark front lines, installations, etc. It could also serve as blinker signal lamp


Optiphone
Talk by light, by a steady modulated beam, not blinker light (also known as photophone)
AN/TVC- 1	formerly SE- 10, involving a modulated light-beam transmitter and receiver, portable, with minimum range of 5,000 yards in sunlight and able to link telephone lines so as to span obstacles such as a river.