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On the sign:
Byers’ improved stockless anchor, 1953
This is one of the two main anchors from Ark Royal, the Royal Navy’s last conventional aircraft carrier. Updated during her life with the addition of steam catapults, mirror landing gear and an angled flight deck, she was able to operate the most modern naval aircraft of her time.
This anchor, manufactured by W. L. Byers & Co. of Sunderland in 1953, weighs 9.5 tons (9.63 tonnes). It is typical of those required for a major warship.
The anchor, one of two placed at the entrance to the National Maritime Museum in Greenwich, was used by the aircraft carrier Ark Royal that was used by the British Navy in World War II. The anchor is different from the classic (Admiralty) anchors, and is mainly intended for large and heavy ships.