HORIZONTAL FIRE. From artillery, is that in which the piece is laid either direct on the object, or with but small elevation above it, the limit on land being 10°, and afloat still less. It is the most telling under ordinary circumstances, and includes all other varieties, with the exception of vertical fire, which has elevations of from 30° and upwards; and, according to some few, curved fire, an intermediate kind, of limited application.
HORIZONTAL PARALLAX. See [Parallax].
HORIZONTAL PLAN. In ship-building, the draught of a proposed ship, showing the whole as if seen from above.
HORIZONTAL RIBBAND LINES. A term given by shipwrights to those lines, or occult ribbands, by which the cant-timbers are laid off, and truly bevelled.
HORN. The arm of a cleat or kevel.
HORN-CARD. Transparent graduated horn-plates to use on charts, either as protractors or for meteorological purposes, to represent the direction of the wind in a cyclone.
HORNED ANGLE. That which is made by a right line, whether tangent or secant, with the circumference of a circle.
HORNEL. A northern term for the largest species of sand-launce or sand-eel.
HORN-FISC. Anglo-Saxon for the sword-fish.
HORN-FISTED. Having hands inured to hauling ropes.