Alerts & Learnings IMCA: Dropped object - falling shim plate while lowering A-frame During the lowering of the A-frame of the crane on a large crane vessel, a plate with a weight of 15kg, rolled out from the auxiliary inboard fleeting sheaves.To view this IMCA alert in full, click the 'Download Alert' button Download Alert Share: Share on Linkedin Share on Facebook Share on Twitter Share with Email