A temporary mast constructed when a vessel has been dismasted, usually in heavy weather. (noun)
Examples of word jury mast
I rigged up a sort of jurymast of a bootlace with a bit of old string, and wandered off to look up the girls, conscious of a jar and a discordance in the scheme of things.
"'Pears to me to have a jurymast rigged upon his back, and fore and main staysails set under each of his arms," said Captain Ephraim.
The quartermaster of the battalion in the fort immediately sprang forward, and seizing the fallen flag tore it from its hold and leapt on to the traverse, where he stood under the heavy fire immovable, until a jurymast was rigged and raised in the place of the shattered staff.
He ships a jurymast, and steers as he best can with an oar.
Obed, smoking his pipe, deliberately uncoiled himself -- I thou as he rose, there was to be no end of him -- and stood upright in the boat, like an ill -- rigged jurymast.