air observation

The road itself was well camouflaged against ground and air observation.

Climate records and upper air observations were punched onto cards in 1936.

"Army Air Observation" planes spotted for a control party on the ground.

Air observation for the infantry attack which began on 13 November was not possible, because of dense white fog during the day.

The shrubs in the basket were a clever camouflage against air observation.

Bad weather prevented air observations of his moves, making his attack a surprise.

An air observation post was also set up atop the art shop to watch for Japanese air strikes.

Ground observers were able to engage six German batteries but air observation allowed another 22 to be bombarded.

Unmanned air vehicles are the latest form of air observation, having been first introduced in the early 1960s.

He was not given pause by the relaxation of the enemy's disguise so far as air observation was concerned.

Suitable targets found by air observation were engaged by artillery using the "zone call" system.

British counter-battery efforts were hampered by the adverse weather, which made air observation extremely difficult.

Up there, camouflaged from air observation by the remnants of the wooden belfry, was the gadget.

Designed to meet a requirement for an air observation post and army co-operation aircraft the Si 201 first flew in 1938.

Soon the entire island was under guard, and coast guard and air observation posts were operational.

Despite "ideal" weather, air observation failed as it did on the II Corps front.

Operations to deprive the Germans of air observation over the attack front were curtailed by poor weather on 29 and 30 July.

During its time of creation, the Regiment inherited only eight gun units, one survey battery, an air observation post flight and two formation headquarters.

Also, few years later, a special Air Observation School was created in order to provide training, in parallel with the establishment of other support units.

The Air Observation Post were under the command of the 40th Infantry Division.

Meanwhile the British General's were kept up to date reports by artillery observers and air observations allowing them to order re-bombardment of enemy held positions.

The supporting riflemen failed to arrive, and 3rd Panzer Brigade reported being under enemy air observation after 19:00 hours.

Then again in the winter of 2006-2007 it was rebuilt into an open air observation car with comfortable and large overstuffed seats for a more expansive view.

However, while shielding the German advance from air observation and attack, the weather also handicapped the 5th Panzer Army.

No. 16 Air Observation Post Flight (4 Auster light aircraft)