Used for sending messages to outside companies. Messages are transmitted via Western Union, ITT and RCA.Being replaced by fax and internet.
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DISPOSABLE
An element intended to be discarded and replaced after one service cycle.
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CAUSTIC EMBRITTLEMENT
An obsolete term replaced by caustic cracking.
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ERROR OF MEASUREMENT
The discrepancy between the result of the measurement and the true value of the quantity measured. NOTE 1: In general, 'true value' may be replaced by 'conventional true value'. NOTE 2: The discrepancy can be expressed as either: the algebraic difference between these two values, i.e. (error of measurement) = (result of measurement) - (true value), or as the quotient of that difference and the value of the quantity measured. These two forms of expression are often identified as 'absolute error' and 'relative error' respectively.
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LIGHTSHIP
A permanently anchored vessel performing the functions of a lighthouse, typically in a location where construction of the latter is impractical. These have largely been replaced by buoys or, as construction techniques have improved, actual lighthouses.
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OCEAN CARRIER
Diesel-fueled vessels have replaced the old steamships of the past, although many people still refer to modern diesel ships as steamships. Likewise, the person who represents the ship in port is still often called a steamship agent. (S
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NAVY NAVIGATION SATELLITE SYSTEM
A satellite navigation system of the United States conceived and developed by the Applied Physics Laboratory of the Johns Hopkins University. It is an all-weather, worldwide, and passive system which provides two-dimensional positioning from low-altitude satellites in near-polar orbits. The Transit launch program ended in 1988, and the system is scheduled for termination in 1996, replaced by GPS.
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MOBILE OFFSHORE DRILLING UNIT
A movable drilling platform used in offshore oil exploration and production. It is kept stationary by vertically movable legs or by mooring with several anchors. After drilling for oil it may be replaced by a production platform or a submerged structure.
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RELIEVED
Said of a buoy that has been removed from a station and replaced by another having the proper operating characteristics.
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REPLACED
Said of an aid to navigation previously OFF STATION, ADRIFT or MISSING that has been restored by another aid of the same type and characteristic.
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SUPERSONIC
Faster than sound. Formerly this term was also applied to a frequency above the audible range, but in this usage it has been replaced by the term ULTRASONIC.
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