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Cruise report 17SIRENA 2 / D274 Cruise RRS Discovery Govan, Sept, 12 th – Ponta Delgada, Oct, 1 st , 2003----------------------------------------------------------------------------------------------------------------------III-2 The autonomous hydrophones developed by the PMEL/NOAAThe instruments which were recovered during D274 have been developed by the PMEL/NOAA inNewport (OR).1 0 M E T E R P O L Y O L IF IN L IN ES P L IC E D IN T O L O O P3 7 I N C H S Y N T A T I C F O A M F L O A T5 / 8 " S A S. 5 m e t e rs c h a in5 / 8 " S A S W / T H I M B L E B U S H I N G4 0 M E T E R S 3 / 4 " N Y L O N5 / 8 " S A S W / T H I M B L E B U S H I N G1 / 2 " S A SH A R U P H O N E1 / 2 " S A S5 / 8 " S L1 / 2 " S A S1 , 0 0 0 M E T E R S 1 / 4 "J A C K E T E D V E C T R A N1 / 2 " S A S1 / 2 " S A SM U L T I P L E P I E C E S O F 5 / 1 6 "P O L Y E S T E R L I N E , L E N G T HD E P E N D E N T O N D E P T H .1 / 2 " S A S5 / 8 " S A S W I T H B U S H I N G1 0 M E T E R S 3 / 4 " N Y L O N M I N I M U M ,A D D T O M A T C H B O T T O M D E P T H5 / 8 " S A S W I T H B U S H I N G1 M E T E R C H A I N1 / 2 " S A S1 . 5 T O N S W I V E L1 / 2 " S A S5 / 8 " S A SEG & G R ELEA S E5 / 8 " S A S2 M E T E R 1 / 2 " C H A I N5 / 8 " S A S8 0 0 L b . A N C H O R C H A I NN O A A - P M E L - V E N T S7 6 0 0 S a n d p o i n t W a y N ES e a ttl e , W a . 9 8 1 1 5(2 0 6 ) 5 2 6 -6 1 7 5M O O R I N G :A T L A N T I C H A R U P H O N E 2 0 0 2L O C A T I O N :A T L A N T I C , A Z O R E SD R A W N B Y :D A T E :R I C K M I L L E R 1 7 M A R C H 2 0 0 2A P P R O V E D B Y :D A T E :Figure III-2-1: Schematics of the hydrophone moorings deployed during the SIRENA experimentIII-3 Recovery particularsData logging parameters (apply to all):Sampling speed - 250HzData size - 2 byte (12-bit resolution)Number of hard disks - 3 (8GB each - 24GB total)Gain - switch setting of "0"Anti-aliasing filter - 110 HzProgram name - noaalogger2 version 1.5 (6/29/2002)All hydrophone's hardware were checked normal with nominal power consumptions beforedeployment.