I have tried several knots. Don't know what they are called. Uni, I think is one of them. My problem is seeing the line and then getting it to twist the way I want. poor eyesight, and fumble fingers I guess, then I get frustrated. Then really upset, and just put a small loop in an half hitch on each end I want to join. Slide one loop through the other, then take the loose end of the one over/ or outside and slide that tag end through the loop on the inside, then pull both ends so the loops lock together, sorta making a square knot. trim any excess at the half hitches. I have never had this fail, and the knots are small enough to slide right through the smallest of line guides...
Proud to have served with and supported the Units I was in: 1st IDF, 9th INF, 558th USAAG (Greece), 7th Transportation Brigade, 6th MEDSOM (Korea), III Corp, 8th IDF, 3rd Armor Div.
1980 Ebbtide Dyna-Trak 160 Evinrude 65 Triumph