In reply to tom (not the registered one
:
The double bowline is good for tieing in to the harness.
When a fig 8 has been loaded (ie a fall), it's dificult to undo.
The double bowline is much easier to undo, but harder to visually check that it's correct.
I would advise you to find out how to do a double bowline, but only use it if you're 100% confident you got it right.
If not, the use the fig 8, since it's much easier to check visually.
N.B. DOUBLE BOWLINE MUST BE BACKED UP WITH A STOPPER KNOT!!!