The nautical term "stay mouse" refers to an antiquated part of a
sailing vessel
A sailing ship is a sea-going vessel that uses sails mounted on masts to harness the power of wind and propel the vessel. There is a variety of sail plans that propel sailing ships, employing square-rigged or fore-and-aft sails. Some ships ...
's standing rigging
Standing rigging comprises the fixed lines, wires, or rods, which support each mast or bowsprit on a sailing vessel and reinforce those spars against wind loads transferred from the sails. This term is used in contrast to running rigging, whic ...
. On all
sailing ship
A sailing ship is a sea-going vessel that uses sails mounted on masts to harness the power of wind and propel the vessel. There is a variety of sail plans that propel sailing ships, employing square-rigged or fore-and-aft sails. Some ships ...
s built before about the 19th century, the
stays were of natural cords. These lines were looped around the top of each section of the wooden masts using a
spliced loop or
seized loop in their ends. During the 16th century some riggers began to attach stays by splicing or seizing only a small loop into the end of the stay then passing the rope's tail around the mast and back through the small loop, like a slip-knot. To prevent this from slipping tightly around the mast when in use, a strong bulge was built into the standing part of the rope that could not fit through the small loop. ''This bulge'' was called a mouse or stay mouse.
As first
galvanised
Galvanization or galvanizing ( also spelled galvanisation or galvanising) is the process of applying a protective zinc coating to steel or iron, to prevent rusting. The most common method is hot-dip galvanizing, in which the parts are submerged ...
and then
stainless steel standing rigging
Standing rigging comprises the fixed lines, wires, or rods, which support each mast or bowsprit on a sailing vessel and reinforce those spars against wind loads transferred from the sails. This term is used in contrast to running rigging, whic ...
replaced natural fibres, and steel and aluminium replaced wood for masts, the need for these niceties died out. Knowledge of, and interest in, these technologies is kept alive by classic boat and historic ship enthusiasts, as well as by model makers the world over.
References
Historic Ship Models: Stays 69Description and some history
Detail drawings
{{Sail Types
Sailing rigs and rigging