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.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014