I wrote:
When changing the rigging I have used a hacksaw to cut the wires
(1x19
SS), and
that worked quite well in the workshop with a vice when you have the
time, but on a boat moving about and a mast threatening to damage
and
possibly hole the hull, I think a hacksaw would be next to useless.

This should be read in the context of cutting wire. A hacksaw might
come in very handy, if you have to cut the mast or make a jury-rig.

Peter S/Y Anicula