fall home

Fall home describes the inward curve of a ship's hull as it rises toward the deck, measured from the perpendicular line that would extend straight up from the waterline. Rather than sides that angle outward (as in flare), the upper hull narrows as it climbs. This geometry is built deliberately into the frames and planking during construction, creating a distinct visual profile where the deck is notably narrower than the hull's widest point amidships.

The degree of fall home varies considerably across ship types and eras. Traditional naval vessels and many sailing ships exhibit pronounced fall home, sometimes narrowing the deck beam by 10 to 20 percent or more relative to the maximum hull width. Modern cargo ships and tankers typically use minimal fall home, favoring full-width decks for maximum cargo space. The amount is set during the design phase and established through the ship's lines plan, with the shape carried through the molded dimensions of successive frames from bow to stern.

Construction and Purpose

Building fall home into timber and steel hulls serves multiple purposes. In sailing ships, it reduces wind resistance on the hull above water and lowers the center of gravity by concentrating weight toward the waterline, improving stability. The curved inward form also naturally sheds water and spray from the deck during rough seas. In narrower hulls built for speed, fall home helped optimize the fineness of the waterline while maintaining adequate deck space for rigging and crew movement.

The term itself comes from the woodworking sense of timber "falling" or inclining inward from vertical. In shipbuilding vocabulary, it appears in the moulds and templates used by shipwrights, where the curve must be held consistently across dozens of frames. Modern naval architects specify fall home in the lines plan using offsets measured perpendicular to the centerline at each frame station. Excessive or poorly executed fall home can create structural weak points and reduce usable deck area; too little reduces the intended benefits of the design.

Fall home is distinct from flare (outward curve) and tumble home (the final inward curve of the topsides near the gunwale on some warships). You will find fall home mentioned in hull design specifications, in ship surveys where the original form is being assessed, and in historical documentation comparing different vessel classes. It remains a standard feature in yacht and traditional vessel design, where the aesthetic and performance properties of the curved hull are highly valued.