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Floating Derrick Digging Crane Ship...
Unique views:
1612 (12 in 7 days)
Unique downloads:
398 (3 in 7 days)
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|
A derrick crane is a slewing strut-boom crane with its boom pivoted at the base of a mast which is either guyed (guy-derrick)
or held by backstays (stiff-leg derrick) and which is capable of luffing under load.
It is controlled by lines powered by some means such as man-hauling or motors,
so that the pole can move in all four directions.
A line runs up it and over its top with a hook on the end, like with a crane.
It is commonly used in docks and onboard ships.
Some large derricks are mounted on dedicated vessels, and are often known as "floating derricks".
This is one of those ships Rosa the Crane Digger ship...
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