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Austria 
Both manual and automatic piloting of the aircraft are used. A gyro 
compass is used and a normal type of altimeter. The drift sight is built into 
the Wild RC-7 and RC-5 cameras. 
Canada 
Aircraft are generally flown manually although the automatic pilot was 
sometimes used in the tri-camera photography carried out by the R.C.A.F. for 
air navigation charting. Compasses used are the Gyrosen, the Pioneer, the 
Magnesyn, and P8. Distant reading devices are used with the gyromagnetic 
and Magnesyn compasses. Drift sights used are the Eclipse Pioneer B3 drift- 
meter, a manual plexiglass sight with fore and aft sight lines, a simple mechanical 
sight with diagonal drift wires for defining adjacent flight lines, and a modified 
Mark IX A course setting bomb sight. 
A flight line indicator was developed in 1949 which used the Land process 
to provide a print on which the position of the next flight line was registered. 
Pressure sensitive mechanical altimeters are used such as the Kollsman or 
Pioneer Sensitive. All those used for Dominion Government work are calibrated 
at least once a year by the National Research Laboratories. Solar navigation 
devices used are the Solar Navigator made by Photogrammetric Instruments 
Inc., and the astro-compass Mark II. Considerable experimental work has 
been carried out with Shoran. This is fully described in a paper by J. E. R Ross 
appearing in these Archives. 
England 
Flying is generally done manually but the automatic pilot is used in the 
Percival P56 Survey Prince and Dakota aircraft. Compasses used are the 
P-10, the P-11, the D.R.C., the AN5730, the AN5733, the Hughes G3, and the 
R.A.F. distant reading compass. Drift sights used are the Mark II in the Lan 
caster and the DeHavilland, or type P-10 in the Mosquito, the B5 in the 
Dakota, the Aldis telescopic or the Williamson sight in the Prince, the Aldis 
telescopic in the Oxford and the DeHavilland Rapide, and special survey sights. 
Altimeters used are the Kollsman, the Smiths Sensitive altimeter Mark 14, and 
for magnetometer work the STR 30 Radio altimeter. No solar navigation de 
vices are used. The Directorate of Colonial Surveys uses Gee Mark II radar 
continually for navigation and occasionally for control by photographing the 
cathode ray tube and ancillary altimetric instruments instantaneously at the 
time of exposure of each survey photograph. The Ordnance Survey Office use 
the Decca Navigator to control flying in large scale photography. 
Finland 
The Blenheim B-l is flown manually, the Douglas DC-2 or DC-3 by auto 
matic pilot. A gyrocompass is used and an Aldis aiming sight. Altimeters used 
are a normal barometric altimeter and a special liquid statoscope.