6 types of Nautical Knots and their uses
Figure eight knot
The Flemish bend, also known as a figure eight bend, a double figure eight bend, and a rewoven figure eight is a knot for joining two ropes of roughly similar size.
A loose figure-eight knot is tied in the end of one rope. The second rope is now threaded backwards parallel to the first rope. When properly dressed, the two strands do not cross each other.
Although fairly secure, it is susceptible to jamming. If tied, dressed and stressed properly it does not need "stopper" or "safety" knots.
Half hitches knot is useful for attaching a mooring line to a dock
A Round Turn and Two Half Hitches is useful for attaching a mooring line to a dock post or ring although probably less secure than the Anchor (Fisherman's) Hitch.
Bowline knot
The Bowline makes a reasonably secure loop in the end of a piece of rope. It has many uses, e.g., to fasten a mooring line to a ring or a post. Under load, it does not slip or bind. With no load it can be untied easily.
Two bowlines can be linked together to join two ropes. Its principal shortcoming is that it cannot be tied, or untied, when there is a load on the standing end. It should therefore be avoided when, for example, a mooring line may have to be released under load.
The bowline is sometimes referred as King of the knots because of its importance. It is one of the four basic maritime knots
Reef knot
Although the reef knot is often seen used for tying two ropes together, it is not recommended for this purpose because of the potential instability of the knot, and over-use has resulted in many deaths.
Used by sailors for reefing and furling sails.
Clove hitch knot
This knot is particularly useful where the length of the running end needs to be adjustable, since feeding in rope from either direction will loosen the knot to be tightened at a new position.
With certain types of cord, the clove hitch can slip when loaded.
Cleat hitch
The cleat hitch secures a rope to a cleat.