CLIMAT SHIP 



CLIMAT SHIP— Monthly means reported by 



ocean weather ships (WMO Code FM 72B). 

 CLIMAT TEMP SHIP— Keport of monthly 

 aerological means from an ocean weather ship 

 (WMO Code FM76C). 

 CMR — 6'ommon Mode Rejection. 

 Conshelf Two — Continental Shelf Station Num- 

 ber Two. 

 CRT— Cathode ray tube. 



DAPAC — Abbreviation of Z>anger Areas Pacific, 

 a U.S. Naval Oceanographic Office publication 

 containing routing instructions for areas in Pa- 

 cific and Far East waters declared dangerous 

 because of mines. 

 db — Decibel. 



DDI — Z^epth /deviation /ndicator. 

 DHQ — Mean (diurnal high water ine^'uality. 

 DLQ — Mean (diurnal ?ow water inegnality. 

 DRAI — Z?ead i?eckoning Analog /ndicator. 

 DRT — Z>ead /?eckoning 7'racer. A device for 

 continually recording track of own ship (as well 

 as other ships). 

 DRV — Z>eep i?esearch Fehicle. 

 DSL — Z?eep /S'cattering Zayer. 

 DSSP — Z>eep <S'ubmergence Systems Program. 

 DSSRG — Z?eep <S'ubmergence Systems Research 



6^roup. 

 DTG— Z>ate-rime-6^roup. 



DUMS — Z>eep Unmanned /Submersibles. A jet 

 propelled submersible designed to follow a pre- 

 scribed underwater path for collecting oceano- 

 graphic information or for mapping sea bottoms. 

 DUNC — Z^eep Underwater A'uclear Counter. An 

 ultrasensitive radiation measuring device for 

 analyzing the sea's naturally occurring radio- 

 ficl^ivo sourcGS 

 EASTROPIC— £'ft?tern TropicaA Pacific (Pro- 

 gram) . 

 ECM — £'lectronic Counter il/easures. 

 EER— £'xplosive £'cho /Janging. 

 EQUALANT — Eq^latoria,\ AXlantic Survey. 

 EQUAPAC — ^^'Mfftorial Pacific Survey. 

 ESG — Electrically ,S'uspended C^yroscope. 

 ev — £'lectron-t'olt. 

 F — Fahrenheit temperature scale. 

 FLIP — ( PZoating /nstrument PI atf orm ) Similar 

 in design to SPAR, and used as a base for 

 oceanographic research, FLIP is manned and 

 can drift with currents. 

 FLOOD^-(Pi'eet Observation of Cceanographic 

 Z>ata) A program of the U.S. Naval Oceano- 

 graphic Office to place oceanographic instru- 

 ments aboard ships of the regular fleet. 

 FM — Prequency il/odulation. 

 FORD — Ploating Ccean Pesearch and /develop- 

 ment (Station). 

 FRV — Pisheries Pesearch Fessel. 

 GCT— Creenwich Civil Pime. 

 GEBCO— C^cneral Pathymetric Chart of the 



Cceans. 

 G E K — (7eom agn etic Plectr oA"i ne to graph . 

 GEM— C^round Pffect il/achine. 



GEON— (C^yro Prected Cptical i\^avigation) A 

 system of celestial navigation. 



GMT — Creenwich il/ean Pime. 



GTS — Cuinean Prawling /S'urvey. 



HHW — //igher /ligh -wiater. 



HHWI — //igher Aigh water mterval. 



HIRAN — High Precision Qhoran. 



HLW — //igher ?ow water. 



HLWI — //igher ?ow water mterval. 



HODS — fl^ydrographic-Cceanographic Data 

 /S'heets. 



HUK — //wnter-^iller naval force or miit. An 

 ASW force. 



HW— fl'igh water. 



HWF&C — High water /ull and change. 



HWI — High loater mterval. 



HWLI — //igh water /unitidal mterval. 



HWN — High icater neaps. 



HWOST — High loater of ordinary spring rides. 



HWQ — Tropic hig\\ (cater inef^uality. 



HWS — Hi^\ (rater springs. 



HYDRA — A project to evaluate the impact of 

 radiation produced by the detonation of under- 

 water nuclear explosions. 



HYDROLANT — Consecutively numbered radio 

 message originated by tlie I^.S. Naval Oceano- 

 graphic Office, Washington, D.C., to disseminate 

 urgent information affecting navigation in the 

 Atlantic Ocean area. See NAVEAM. 



HYDROPAC — A consecutively numbered radio 

 message originated by the U.S. Naval Branch 

 Oceanographic Office, Honolulu, Hawaii, to dis- 

 seminate urgent information affecting naviga- 

 tion in the Pacific Ocean area. 



HYPSES — {Hy Avogv?i^hic Precision Scanning 

 Pcho iS'ounder) An improved instrument for 

 conducting bathymetric surveys in deep oceanic 

 areas. 



I AC— Weather analysis (WMO Code FM 45C). 



lAC FLEET — Weather analysis in abbreviated 

 fonn (WMO Code FM 46C) . 



ICE — Prefix for ice group in a weather report. 



ICECON — Controlled ice information in time of 

 war oi' emergency. 



IFF — /dentification Priend or Poe. 



IGY — (/nternational Ceophysical Year) By inter- 

 national agreement, a period during which 

 greatly inci-eased observation of worldwide geo- 

 physical iDhenomena is undertaken through the 

 co-operative effort of participating nations. 

 July 1957-December 1958 was the first such 

 year; liowever, precedent was set by the Inter- 

 national Polar Years of 1882 and 1932. 



IHD — /nternational /Tydrological Pecade. 



IIOE — (/nternational /ndian Ccean Pxpedition) 

 An international effort to increase the knowledge 

 of the Indian Ocean. This project is current at 

 this writing. 



ILW — /nternational Zow water. 



lOSN— /ndian Ccean iS'tandard 7\^et. 



IR — /nfrared radiation . 



ITcal — /nternational Pable calorie. 



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