Abbreviations and Letter Symbols
235
of which uses more than the first letter of each word:
- Conrail (Consolidated Rail Corporation)
- Pepco (Potomac Electric Power Co.)
- Inco (International Nickel Co.)
- Aramco (Arabian-American Oil Co.)
- Unprofor (United Nations Protection Force)
- Use lowercase in common-noun combinations made up of more than the first letter of lowercased words:
- loran (long-range navigation)
- sonar (sound navigation ranging)
- secant (separation control of aircraft by nonsynchronous techniques)
9.49.
The words infra and supra are not abbreviated.
Terms of measure
9.50.
Compass directions are abbreviated as follows:
- N.
- NE.
- E.
- SW.
- S.
- NNW.
- W.
- ESE.
- 10° N. 25° W.
- NW. by N. ¼ W.
9.51.
The words latitude and longitude, followed by figures, are abbreviated in parentheses, brackets, footnotes, sidenotes, tables, and leaderwork, and the figures are always closed up.
- lat. 52°33'05" N.
- long. 13°21'10" E.
9.52.
Avoid breaking latitude and longitude figures at end of line; space out line instead. In case of an unavoidable break at end of line, use hyphen.
9.53.
Temperature and gravity are expressed in figures. When the degree mark is used, it must appear closed up to the capital letter, not against the figures. Note the following related abbreviations and letter symbols and their usages:
