In climbing, the offset overhand bend (EDK) is also very commonly used. It's arguably simpler than the double fishermans. I'm a huge fan of the zeppelin bend -

In climbing, the offset overhand bend (EDK) is also very commonly used. It's arguably simpler than the double fishermans. I'm a huge fan of the zeppelin bend - it's a bit exotic, but is catching on in some climbing circles. Competitive tree climbing is carefully adjudicated for safety... in the PNW at least, judges have absolutely no problem with it being used as a joining knot on a lifeline.