Bock flying one of the observation planes. Keep strictest watch enemy planes and submarines. Canada prepared to ship six transport planes. The demolition of the runway trapped planes. They were in two formations of four planes each. The force's equipment includes several Russian-supplied fighter planes and transports. It was regarded as one of the best fighter planes of World War II. The stormy weather had resulted in the grounding of all "Luftwaffe" reconnaissance planes. I went outside on hearing enemy planes. Jr. Observers aboard the weather planes reported both targets clear. They were known as sail planes or fairwater planes. Captain Rickenbacker attacked a group of five enemy planes. It was an instrument for measuring angles in the horizontal and vertical planes. Angles between cleavage planes vary between minerals. The dihedral angle is the interior angle between any two face planes.