Glossary B
A Balloon is characteriezed as an un-powered lighter-than-air vehicle. Balloons can derive their buoyancy from the confinement of hot air, hydrogen, helium, ammonia or other gas. Balloons can be free (un-tethered and free to drift with the wind) or tethered to the ground (sometimes called captive or kite balloons).
- 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.
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;