Sphenoid bone - internal view There are four main parts to the sphenoid bone: the body (corpus), the lesser and greater wings (alae minores et majores) and the pterygoid processes. The body is the most centrally positioned portion. Anteriorly it contributes to the nasal cavity, laterally it builds the medial wall of the optic canal.
The anchor you chose will depend on the type of anchoring you do. Cruising anchors are larger plow or claw anchors capable of holding boats to various bottoms. Kedging, Forfjord and Workboat anchors are used on commercial vessels.
depends on what you're doing but by the bow is usual. The current & wind will normally turn the boat bow forwards & that is usually the best alignment for taking the waves on a boat. Anchoring by the stern is useful in hot weather with little wind as it opens up the cabin to maximum breeze.