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.
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.
As Titanic's stern rose into the air, the strain of all that weight was too much for the keel to handle. As a result, she broke in half.
I try to solve your problem : Why aft trim is preferred in vessel entering drydock? * We need stern part, normally stern frame or aft peak tank bhd normally at fr10 to touch the keel block first. * minimize ballast load. In lightship condition, the vessel is always trim by stern. So to make vessel in even condition, or trim by stem, require large ballast load, compare if we want to reduce trim by stern. Therefore reduce pressure on keel block and hull.