- a flagstaff at the bow of a vessel, on which a jack is flown.
Origin of jack staff
Examples from the Web for jack staff
Historical Examples of jack staff
From the stoke-hole to the funnel, from the jack-staff to the rudder, she explored that boat.Gorillas & Chimpanzees
R. L. Garner
Already he had made out the double stars in the bunting at the jack-staff.Ray's Daughter
Close at hand was a jack-staff upholding an American ensign."Forward, March"
Ten minutes later the steamer is under way again, with no flag on the jack-staff and no black smoke issuing from the chimneys.
Every outward-bound boat had its flag flying at the jack-staff, and sometimes a duplicate on the verge staff astern.