That's the stern. The keel is under water, and the starboard side is the right-hand side when you are facing forward on the water craft.
The sides of a boat are port {left}, starboard {right}, bow {front}, stern {back}, hull{bottom}, and keel{center}.
left = port right = starboard front = bow rear = stern top = deck bottom = keel
In simplistic terms. -The front is the "Bow". The left is the "Port side". The right is the "Starboard side". The back would be the "Stern". The part that floats is the "Hull". The back bone is the "Keel". You also have words like Gunwale, foc'sle, thwarts, chine plates, fantail, free board, etc. Dependent on the size of your vessel.
Titanic was built from the keel up. The stern was not built separately.
It is the Keel.
A ship that lists is uneven due to bad trim, that is, it's uneven on its keel from front to back, or side to side (bow to stern, port to starboard). Normally, equalization of forward/aft, port/starboard water tanks are used to level the ship. However, uneven loading, or flooding can cause listing. Since flooding is always a possibility, watches must log the ship's list and draft every hour.
bow stern keel foremast centermast radarpost
There is no "keelhaul." A ship's keel is the bottom of the ship from stem to stern. A crewman or anyone being seriously punished was dragged under the ship from the prow (stem) to the back (stern). Depending on how long the ship was, the person most likely drowned before reaching the stern. The person was keelhauled.
Puppis--The Stern: It's the back part of the ship of the argonauts, the Argos. It was once part of a larger constellation called the "Argo Navis", now it's broken into four: Puppis--The Stern Vela--The Sails Carina--The Keel Pyxis--The Compass
bow bilge stern deck mast sails keel rigging hull bulkhead
The aftermost sail in a multi-masted boat is typically the mizzen, but in some rigs can be called the spanker as well.
A single continuous line of planking or metal plating running longitudinally on a vessel's hull. On modern metal hulled vessels the strake running the centerline of the vessel is known as the "Keel Strake". Other strakes are assigned letter designations working outward from the keel strake; "A" strake, "B" strake, etc. The strake at the turn of the bilge is called the "Bilge Strake". The longest continual strake at the uppermost deck is called the "Sheer Strake". Aside from the keel strake, there are two of every strake: Port & Starboard. Depending on the curves of the ship's hull, some strakes may be terminated before reaching either the bow or stern of the vessel.