Sail on over to Apparent Wind to view a gif image for easy to follow visual instructions to tie an anchor hitch knot.
If you prefer to watch a video for instructions with Captain John to tie the anchor hitch knot get a grip on this one:
The crow was an essential part of the early sailors' navigation equipment. These land-lubbing fowl were carried on board to help the navigator determine where the closest land lay when the weather prevented sighting the shore visually. In cases of poor visibility, a crow was released and the navigator plotted a course that corresponded with the bird's because it invariably headed straight toward land, "as the crow flies".
The crow's cage was situated high in the main mast where the look-out stood his watch. Often, he shared this lofty perch with a crow or two since the crows' cages were kept there: hence the "crow's nest."