Respectively, the front and back of the ship; together they refer to the entire ship
Anything that runs from the bow to the stern or vice versa. Something in line with the centreline of a vessel.
used of anything fixed longitudinally between bow and stern.
Following the line of the keel, from bow to stern
In a line parallel to the keel.
in the lengthwise direction of a ship running from stern to stem
Parallel to the ship's centerline.
Terms that refer to the front and rear of the ship.
In line with the keel, lengthways of the ship.