In nautical|lang=en terms the difference between jackstay and backstay
is that jackstay is (nautical) a line (rope, webbing or cable), attached to a boat at the ends, to which a safety harness can be clipped to restrain falling in rough conditions and to prevent falling overboard while backstay is (nautical) a part of the rigging of a sailing ship extending from masthead the top of the mast to the back of the ship; they support the strain on all upper masts and provide additional support to the shrouds when the wind is abaft the beam.
As nouns the difference between jackstay and backstay
is that jackstay is (nautical) a stay (rope, bar or batten), running along a ship's yard, to which is attached the head of a square sail while backstay is (nautical) a part of the rigging of a sailing ship extending from masthead the top of the mast to the back of the ship; they support the strain on all upper masts and provide additional support to the shrouds when the wind is abaft the beam.
jackstay
English
Noun
(
en noun)
(nautical) A stay (rope, bar or batten), running along a ship's yard, to which is attached the head of a square sail.
(nautical) A cable between two ships or from a ship to a fixed point which can be used to support a load during transfer of personnel or materiel along the cable.
(nautical) A line (rope, webbing or cable), attached to a boat at the ends, to which a safety harness can be clipped to restrain falling in rough conditions and to prevent falling overboard.
(underwater diving) A line fixed at both ends, which may be used to guide a load or a diver along the route of the line. Uses include guidance to and from the underwater work site, and as a means of controlling an underwater search.
backstay
English
Noun
(
en noun)
(nautical) A part of the rigging of a sailing ship extending from masthead the top of the mast to the back of the ship; they support the strain on all upper masts and provide additional support to the shrouds when the wind is abaft the beam.