This moulding is used to support a 61b or 61h single block in the extreme bow of a SAILSetc IOM so that sufficient travel of the primary winch line can be obtained. The moulding needs minor shaping to accept the block, and comes with the required fixings and drawing. It is bolted to the foredeck tube used to house the swivel line for the No 1 rig. Easy removal of the item permits access to the block and straightforward replacement of the primary winch line should it require maintenance