Battle of Britain Clock

[celticmarine10]

Hello once again everyone.
I have yet another question regarding the defenses of Britain during the Battle of Britain. Benath the boards showing the readiness of squadrons, was a clock with arrows of Red, yellow, and blue, each standing for how current the plots were on the table. What is the point of the clock because wasnt the currentness of the plot shown in the arrows giving the raid's direction?
Thnaks alot!
Regards,
Celtic

 

[fastmongrel]

Sector clock - Wikipedia, the free encyclopedia

A brief expanation I have seen a more detailed explanation but cant seem to find it at the moment. Google "sector clock" or "control clock".

 

[Mustang nut]

Hello once again everyone.
I have yet another question regarding the defenses of Britain during the Battle of Britain. Benath the boards showing the readiness of squadrons, was a clock with arrows of Red, yellow, and blue, each standing for how current the plots were on the table. What is the point of the clock because wasnt the currentness of the plot shown in the arrows giving the raid's direction?
Thnaks alot!
Regards,
Celtic

The clock changed colour sector every five minutes, the markers were for the colour valid at the time of the plot being laid on the table. From that you can deduce how old the plot is. If it goes red yellow blue if the clock is in the blue sector a red marker is 10 to 15 minutes old while a yellow marker is 5 to 10

 

[Edgar Brooks]

It wasn't used just for the plots, but also for the state of the Squadrons. If an "Enemy Sighted" light was over 5 minutes old, they might ask for an update, likewise if a "Tally Ho!" had become old. If the Squadron had been flagged up as "Landed" only 5 minutes previously, the controllers would know that they couldn't call on them, yet, for another scramble, until they'd had time to completely refuel and rearm.
Edgar