Comment on the Tutorial: The Somerville Bowline is a great tie, but it is important to be aware that its knot may tighten under tension. This is less relevent in cases such as up lines for suspension, where most scenarios will not require the column tie to be undone.

In situations where a quick release option is desireable, a ulternative column tie variation such as the French Bowline or the Burlington Bowline may prove superior because there the knots do not tighten as much under tension allowing the tie to be undone reletively easily in an emergency.

The creation of the Somerville Bowline is commonly credited to Topologist, a great guy and fantastic rope teacher from San Fransisco. For more info on Topologist, check out http://www.crash-restraint.com/blog.