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A-frame

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The Allied A-frame being hoisted for installation on Knorr at the WHOI Iselin Marine Facility.
A-frame on the stern of Knorr showing tele-boom and Lantec winch mounted atop the frame.
A-frame engaged in coring operations during Sea Trials in September 2007. The half height roller sheave has the load.
A-frame in the final phase of load transfer to the stern sheave.
Lantec winch hoisting the extruder onto corehead during recovery.