Page 44 - Peter Randall "The Craft of the Knot.."

You can also tie the Butterfly Bend by tucking both ends at once,
holding one in each hand. It is quicker than it sounds. Use the Butterfly
Bend to tie similar materials. It is strong, secure, and unties easily.

CARRICK BEND

The Carrick Bend is traditionally used on large ropes, such as ships’
hawsers. When it has been under strain and perhaps wet, it is loosened
by striking the outer bights of the knot with something blunt, like a
wooden fid (an object like a marlinespike).

STEP 1 Lay down two ropes, one on the left and one on the right. Use
the running end of the rope on the right to make a crossing turn. Take
the other rope and move its running end in an over-and-under pattern

through the right-hand rope.

STEP 2 Finish the tuck.