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Thursday, January 18, 2018

The Rigging of FIRE WIRES

It has come to our attention that there are currently two acceptable methods for rigging fire wires. One is contained in the OCIMF Mooring Guidelines and the other is contained in ISGOTT

The two methods referred to are basically the same except for the position of the bight in the wire.

The Mooring Guidelines recommends that this should be over the side of the vessel

The ISGOTT guidelines recommend that the bight should be on deck

The reason that the publications are different in this respect, we understand is simply an oversight. However, we bring to the attention of members the fact that the SIRE VIQ will accept either as the correct method.

We understand that this difference can cause some difficulties with Vetting Inspectors depending upon which publication they support. However, this should not detract from the fact that the SIRE VIQ accepts both methods.

We have been informed by OCIMF that the reasoning behind the Mooring Guidelines recommendation to position the bight over the ships side are two-fold.

1. The Tug can see how much line he is getting, this will enable him to adjust the thrust of the tug when the weight comes on.

2. It will prevent trapped limbs etc in bights on deck.

OCIMF have further advised us that ISGOTT will be revised in due course to coincide with the Mooring Guidelines Booklet.

The act of recovery of the fire wire has been discussed by some members, particularly when the bight is over the ships side and the difficulties associated with this. Whilst there is some merit to this, it should be borne in mind that if the bight is secured over the ships side, then the point of securing the weak link (rope lanyard) will also be at a bight, but at deck level. Therefore, when the wire is recovered on the spool the initial weight of wire to recover will be one half of the bight hanging over the side, which is effectively the same weight as a single length of wire hanging over the side. As the bight is recovered the weak link is removed and the single length hoved home.