- Bearing (or hand bearing) compass : Bearing (or hand bearing) compass is typically a compass of superlative accuracy that is used in fixing position by triangulation; that is, taking a Reading from 2 or more landmarks so that your position may be plotted by drawing these bearing lines, which will intersect at your position.

- Beam compass : Beam compass is a type of compass capable of drawing circles and arcs that exceed the limits of a standard compass.

Binnacle is defined as the mount for the compass, usually located on the wheel's pedestal.

Bow is a term which can refer to:

1. The forward or front end of a boat, asused in boat sailing term
2. The variation from a straight line in the vertical plane of a roll formed piece. It can be eitherCross bow or longitudinal bow, as used in roll forming, corrugating, and metal fabricating processes

A Book-sewing machine operator is a person who sets up and operates machine to sew gathered and collated signatures (pages) into book form for binding; pulls thread through lubrication box, thread guides, and needle to thread machine, and soaks bobbins of thread in water to lubricate thread;

Button is described as a small cylindrical die steel with an opening larger than the punch point size, generally by a percentage of the thickness of the material being pierced.

Base metal is the collective term for any and all non-precious metals. It refers to any of the more common and more chemically active metals, example lead, copper;

A Blue swimming crab (Portunus pelagicus) is a hairy crab refers to a square shaped carapace, a little longer than wide, markedly convex and uneven, bearing four sharply edged epigastric lobes.