Re: help me identify this
A CDI Flexible Furler... that is the 'internal' halyard. Not sure of the purpose of the slug, but it can't be too hard to cut away and reinstall if necessary.
1984 Fast/Nicholson 345 "FastForward"
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)