Bathymetry 



Bearing 



The science of determining and 

 interpreting ocean depths and 

 topography. 



1. (general) The horizontal angle at 

 a given point measured clockwise 

 from a specific reference datum to a 

 second point. Also called bearing 

 angle. 



2. (navigational) The horizontal 

 direction of one terrestrial point 

 from another, expressed as the 

 angular distance from a reference 

 direction. It is usually measured 

 from 000° at the reference direction 

 clockwise through 360°. The terms, 

 bearing and azimuth are sometimes used 

 interchangeably, but in navigation 

 the former customarily applies to 

 terrestrial objects and the latter to 

 the direction of a point on the 

 celestial sphere from a point on the 

 earth. 



Binary 



(1) Pertaining to a characteristic or 

 property involving a selection, 

 choice, or condition in which there 

 are two possibilities. (2) per- 

 taining to the numeration system with 

 a radix of two. 



Binary Coded Decimal 

 (BCD) 



Pertaining to a decimal notation in 

 which the individual decimal digits 

 are each represented by a group of 

 binary digits, e.g., in the 8-4-2-1 

 binary coded decimal notation, the 

 number 23 is represented as 0010 0011, 

 whereas in binary notation, 23 is 

 represented as 10111. 



Block 



A set of things, such as words, 

 characters, or digits, handled as 

 a unit. 



Block diagram 



A diagram of a system, instrument, 

 computer, or program in which selected 

 portions are represented by annotated 

 boxes and interconnecting lines. 



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