Different types of knots: tight interlacing of two ropes. A knot is also a unit of speed in aviation and marine navigation equal to one nautical mile per hour.
Halyard knot: interlacing of ropes used to attach the halyard to a sail.
Reef knot: interlacing of ropes made of two half-knots inverse to each other.
Bowline: interlacing of ropes with a loop that can be used as support.
Two round turns and a half-hitch: interlacing of ropes around an object by making two turns, then a hal-knot.
Two half-hitches: interlacing of ropes around an object by making two half-knots, one after the other.
Double shell bend: double interlacing of ropes, used to attach two ropes together.
Sheet knot: interlacing of ropes used to attach two ropes together.
Figure of eight knot: interlacing of ropes used to finish the end of a rope.
Overhand knot: simple interlacing of a rope.