Work Package 2 / 3 TECHNOLOGIAL & PROCEDURAL HARMONISATION

1. Work Package 2 / 3 TECHNOLOGIAL & PROCEDURAL HARMONISATION Jessica Craig, Oceanlab, University of Aberdeen jessica.craig@abdn.ac.uk FixO3 General Assembly 14th to the 16th October 2014, Heraklion-CRETE

2. WP 2 / WP3 – Technological & Procedural Harmonisation Task 2.1:Review of the current status of all fixed observing sites Task 3.1: Assessment of procedures • Current status of DELOS A & B (October 2014) • Multiple (paired) array • DELOS A: Lat: -7.9; Lon: 12.14; Depth: ca. 1400 m • DELOS B: Lat: -7.95; Lon: 12.28; Depth: ca. 1400 m • BP, University of Aberdeen, MBARI, National Oceanography Centre, Angola Science Institute, • Texas A&M University, Glasgow University B A

3. WP 2 / WP3 – Technological & Procedural Harmonisation Task 2.1:Review of the current status of all fixed observing sites Task 3.1: Assessment of procedures Oceanographic Module DELOS instruments: ADCP – Teledyne RDI 300 Hz Pressure sensor – Aanderaa 4017E Conductivity sensor – Aanderaa3919 Current meter – Aanderaa3820R Transmissometer– WetLabs C star Fluorometer and turbidity sensor – WetLabs ECO FLUNTU Oxygen sensor – Aanderaa3975 tills cameras – Kongsberg oe14-20 - Close view - Wide view Active acoustic– Kongsberg Mesotech 675kHz Passive acoustic – Sensor Tech. SQ42 Hydrophone Sediment trap (100 mab) (DELOS B only) – McLane Parflux 78H-21 Sediment trap Module Guest Module 4.5 m Acoustic Module Camera Module 8.1 m

4. WP 2 / WP3 – Technological & Procedural Harmonisation Task 2.1:Review of the current status of all fixed observing sites Task 3.1: Assessment of procedures • Operating Scheme • DELOS serviced every 12 months • Annual servicing in September (ca. 14 days) using Field Support Vessel with ROV Pre-deployment • Design: DELOS docking station design minimises seafloor disturbance during servicing. Instruments are fixed onto ROV removable modules so all instruments are returned to exact same location. Platform on legs to minimise disturbance from eddies near the seafloor. • Maintenance/service issues: There is one spare set of instruments. If any instrument cannot be fixed/replaced during service, there is a 12 month delay. • Calibration: Instruments that cannot be calibrated onboard are taken onshore for servicing at 2 year intervals.

5. WP 2 / WP3 – Technological & Procedural Harmonisation Task 2.1:Review of the current status of all fixed observing sites Task 3.1: Assessment of procedures Deployment • Means: Field Support Vessel and ROV • ROV survey conducted (no contact with seafloor) prior to module recovery • ROV recovers all modules • Data downloaded onto hard drives • Instruments serviced and prepared for re-deployment during transit between platforms • ROV returns modules to docking station

6. WP 3 – Procedural Harmonisation Task 3.1: Assessment of procedures On the field • Oceanographic data are saved as asciifiles • ADCP and scanned sonar require commercial proprietary viewing software • Digital stills and audio files • All raw data stored on USB hard drives. One HD transported to Oceanlab for transfer to DELOS server. • Data Management and Data Access • Delayed Mode: Pressure, temperature, salinity, oxygen, chlorophyll, turbidity, beam attenuation, current direction, current speed, close view still images, wide view still images, hydrophone, sonar, sediment trap (DELOS B only) • Key persons involved in data management :Jessica Craig, Stewart Chalmers, John Polanski (Oceanlab, University of Aberdeen) • Project update • Oceanographic data from DELOS B now uploaded to PANGAEA. • Plans to deploy settlement panels in the guest modules (INDeep). • Vardaro, M.F., et al. 2013. "A Southeast Atlantic deep-ocean observatory: first experiences and results." Limnol. Oceanogr. Methods 11: 304-315. • R. Milligan PhD thesis – analysis of the fish assemblage