semaphore

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The inter-processor communication in the design is a semaphore flag.
A beautifully designed modern day museum is a perfect fit then for McCluskey and co who take to the stage clad in black, silently waving semaphore flags as they play Dazzle Ship's evocative title track.
To communicate commands to the formations on the field and demonstrate the Signal Corps' historic and important role in the Army and nation's history, semaphore flags were used during the change-of-command ceremony.
The first 615 people taking part in the project during July were chosen randomly from 14,500 applicants, and include an aquatic scientist wearing a "poo costume", a cyclist using pedal power to light up his specially created suit and an 83-year-old armed with semaphore flags.
The first 615 people taking part in the project during July were chosen at random and include a cyclist using pedal power to light up his specially created suit and an 83-year-old armed with semaphore flags.
Pupils used semaphore flags to decode maths problems.