Overhand knot

The overhand knot is the simplest knot made, as shown in figure 10-38. It is very important,

Figure 10-37.-Tensile strength decreased by knot.

Figure 10-38.-Overhand knot.

Figure 10-39.-Binder's knot.

however, since it forms a part of many other knots. You use the overhand knot at the end of a single thread when you are hand sewing.

Binder's Knot

A binder's knot is the simplest method of joining two cords or threads together, as shown in figure 10-39. Use it at the end of a double cord when hand sewing to prevent the cord from pulling through the material as you sew.

Square Knot

The square knot is the most common knot for joining two ropes or cords, as shown in figure 10-40. It can be easily and quickly tied and untied, and it is secure and reliable except when made with ropes and cords of two different sizes.

Surgeon's Knot

The surgeon's knot is a modified form of the square knot (figs. 10-41 and 10-42). In fact, it

Figure 10-40.-Square knot.

Figure 10-41.-Surgeon's knot.

Figure 10-42.-Surgeon's and lock knot.

is the same as the square knot, with the exception of the first overhand knot, which is a double turn. This double turn keeps the cord from slipping while the last overhand knot is tied.

Bowline

The bowline is used to connect the reserve parachute pilot chute bridle line to the canopy vent lines (fig. 10-43).

Half Hitch

The half hitch, shown in figure 10-44, is used to form the tie for the safety ties on ripcord pins

Figure 10-43.-Bowline.

Figure 10-44.-Round knot and two half hitches.

on the various types of personnel, cargo, and deceleration parachutes. Normally, three half hitches in a series are used for the safety tie.