Re: Columbia 24'...Rope Halyards
most likely not but why would you need 7/16 for a haylard on a 24' boat. todays materials used for haylards are ten times as strong as they were in the 60's. the main haylard on my 33 is 5/16 wth the cover striped off half the length and the core is less than 1/4". the wire sheaves on most older boats are not very wide and the cut of the groove is different for wire then rope. sometimes you can use a narrow rope sheave and the new high tech line and make it work without modifying the mast.
"FULL TILT" SOVEREL 33
"GOLD RUSH" PRINDLE 16