Granny knot its possible use tying the necks of grain sacks. When attempting to tie a reef knot (square knot), it is easy to produce a granny knot accidentally. This is dangerous because the granny knot can slip when heavily loaded. A tightened granny knot can also jam and is often more difficult to untie than the reef knot. It is better to tie a reef knot in nearly all circumstances. One way to distinguish them is that in the reef knot each loop passes completely over, or completely under (not through) the neck of the other. The reef knot is commonly
USS Tom Bowline (1814) — only to be driven off by a gale. "Hornet" arrived five days later, but her landfall coincided with the appearance in the area of British brig-sloop . The two ships closed for action, and "Hornet" damaged "Penguin" seriously enough to warrant destruction of the Briton. The sighting of strange sail on the horizon hastened "Hornet's" burning of the prize, but apprehension turned to relief as the sails proved to be "Peacock" and "Tom Bowline" returning to Tristan da Cunha for the planned rendezvous. "Tom Bowline" embarked the "Penguin's" captive crew and took the prisoners to Rio de Janeiro, Brazil.