Also known as: blk.
BLK has various meanings in the Aviation category. Discover the full forms, definitions, and usage contexts of BLK in Aviation.
The name given a pulley or sheave, or system of pulleys or sheaves mounted in a frame, and used to multiply power when moving objects by means of ropes run over the sheaves. Single, double or triple-when used with the word block indicate the number of sheaves it contains.
AviationDesignation applied to information systems, and to associated areas, circuits, components, and equipment, in which national security information is encrypted or is not processed.
AviationLast updated: