gantline

gant·line

 (gănt′līn′, -lĭn)
n. Nautical
A rope passed through an overhead pulley, as at the top of a mast, that is used for hoisting.

[Perhaps alteration of girtline, gantline : girt (variant of girth) + line.]

gantline

(ˈɡæntˌlaɪn; -lɪn)
n
(Nautical Terms) nautical a line rove through a sheave for hoisting men or gear
[C19: variant of girtline; see girt1, line]