3.25 Two methods of mousing a hook are currently used.
The 'standard' method used over the years (Figure 3:13), has an inherent
problem. In cases where a sling is attached to a hook, which may be moved so as
to cause displacement, the gear or block may become inadvertently twisted so
that the sling engages the mousing instead of the hook (Figure 3:14). Therefore
care must be taken when using this method. In cases where two or more eyes of
slings are engaged by a hook, it is difficult, but not impossible to lash the
eyes into the cup of the hook, so that they cannot be displaced accidently.
Figure 3:15 shows one method.
The mousing twine is used on the bight for speed of application
and strength. It is first hitched to the hook above the bulge of the shank so
that it cannot be pulled downward. It is then led towards the cup of the hook,
being fixed to the shank again by one or more half hitches prior to the
formation of the first figure of eight or diagonal lashing turns. These are
passed around the hook on alternate sides of the sling eyes. At least 2 half
hitches are passed around the diagonal turns and inside the eyes of the slings
to prevent the bights of the diagonal turns from sliding over the bill of the
When load is
released, sling can jump across mousing
method. Form two complete figure of eight turns and finish with two half