• Cleat Hitch :  Secure a line to a Deck Cleat (tying docklines, anchor lines, mooring pennant)

• Round Turn & Two Half Hitches :  This knot is used to ties a line to a pole. (tying fenders, tying docklines to pilings and rings)
   

• Clove Hitch :  This knot is used to tie a line to a post or a piling. When used with two half hitches it resists sideways sliding better than a round turn.

• Sheet Bend :  This knot is used to bend or tie two lines of equal or slightly different sizes together.

• Bowline :  This knot is used to place a secure loop in the end of a line.  A bowline will work loose with time and should not be used in fastening an anchor line to an anchor.

• Bowline :  This knot is used to tie a line around one's waist.

• Square Knot :  An easily untied knot used to tie the ends of two lines together.  Best used as a binding knot where it is under a constant tension.

• Figure Eight :  This knot is used as a stopper knot.

Advanced Knots

• Anchor Bend or Fisherman's Bend :  A more secure knot for fastening a line to a loop such as on an anchor or a fish hook.

• Doubled Sheet Bend : A more secure knot for bending two lines together.

• Bowline on a Bight :  This knot is used to make a pair of fixed loops in the middle or at the end of a line.  This is a strong knot and can be used in overboard rescue, as a towing bridle and in a pinch, even to make a boatswain's chair to be used to ascend the mast.
   

• Carrick Bend :  This knot is also called a "Sailor's Knot" and can be used for bending two heavy lines ( i.e. towing hawsers and cables ) together. 

• Rolling Hitch :  This hitch is used to attach a non-slip loop to a pole or another line such as a tow line.  When tied back around its own standing part as shown here, it can be used as a adjustable loop and called a Taut Line Hitch.