Argentine Navy ARA San Juan (S-42) Search 2018

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1 Daily Status Report: OI Seabed Constructor Key Developments; Next 24hrs; 11:32hrs LT Perform cargo transfer (2x Edge Tech Bottles etc) with ARA Admiral Brown. Acoustically maintained AUV Fleet(5) 17:17hrs LT ROV HD-35 dive on POI-09 location 17:52hrs LT Commenced ROV GVI survey of POI-09 contact (Geology) 19:24hrs LT ROV HD-35 on deck, on transit to POI-10 location 20:38hrs LT ROV HD-35 dive on POI-10 location 21:16hrs LT Commenced ROV GVI survey of POI-10 contact (Geology) 21:28hrs LT ROV HD-35 on deck, on transit to AUV-6 location hand shake location Continue monitoring and acoustically maintaining AUV Fleet(5) Recover AUV-7 Launch AUV-7 (Area-2 infill) Recover and recycle AUV-5, AUV-2, AUV-1 Current Task / Search Status AUV Fleet (5) Search Survey Operations, Site-1 Area-04 & Area-05 Site-01 Processed Progress Map

2 AUV Status; AUV Dive Site/Area AUV Site-01/Area-01 AUV Site-01/Area-01 AUV Site-01/Area-01 AUV Site-01/Area-01 AUV Site-01/Area-03 AUV Site-01/Area-03 AUV Site-01/Area-04 AUV Site-01/Area-01 AUV Site-01/Area-02 AUV Site-01/Area-02 AUV Site-01/Area-03 AUV Site-01/Area-03 AUV Site-01/Area-05 AUV Site-01/Area-01 AUV Site-01/Area-02 AUV Site-01/Area-03 AUV Site-01/Area-04 AUV Site-01/Area-04 AUV Site-01/Area-01 AUV Site-01/Area-01 AUV Site-01/Area-03 AUV Site-01/Area-03 Launch (UTC) :28hrs :11hrs :47hrs :16hrs :55hrs 06:36hrs :08hrs :32hrs :01hrs :38hrs :00hrs :18hrs :15hrs :05hrs :09hrs :46hrs 14:34hrs :23hrs :07hrs :10hrs :16hrs 12:22hrs KM Yesterday KM Total Total Run :32hrs :37hrs :46hrs :03hrs :43hrs :53hrs :52hrs :28hrs :16hrs :14hrs :57hrs :45hrs :45hrs :18hrs :26hrs :25hrs :00hrs :27hrs :53hrs :33hrs :40hrs :20hrs On deck :11hrs On deck :49hrs On deck :33hrs On deck :19hrs On deck 01:37hrs On deck :29hrs On deck :03hrs On deck :59hrs On deck :52hrs On deck :57hrs On deck :03hrs On deck :23hrs On deck :35hrs On deck 03:11hrs On deck :34hrs On deck :57hrs On deck :43hrs On deck 04:56hrs On deck :42hrs

3 AUV Dive Site/Area AUV Site-01/Area-03 AUV Site-01/Area-02 AUV Site-01/Area-01 AUV Site-01/Area-04 TOTAL Site-01/Area- 01/02 Launch (UTC) :04hrs :28hrs 19:44hrs :18hrs KM Yesterday KM Total Total Run :56hrs On deck :09hrs 14:37hrs On deck :26hrs 10:20hrs :42hrs *Projected Coverage KM2 *Projected coverage is based on the KM Distance Long Line x Section Line Spacing. Line Spacing 800m. AUV-5, Dive-25, Dive-28, Dive-33 line spacing 500m. This is not the processed/actual coverage. Weather; ARA San Juan Site-01: AVG Wave Height 2.9m, AVG Wind 09knts Model Cycle 2018 SEP Z Zone: UTC-4hrs Hours AUV No Dive Navigation Mosaic / Processing PAYLOAD STATUS Analysis Infill Digitalisation AUV2 DIVE 1 Complete Complete Complete Complete AUV6 DIVE 4 Complete Complete Complete Complete DVL Calibration acquired, 5 POIs DVL Calibration acquired, 1 POI

4 AUV1 DIVE 6 Complete Complete Complete Complete DVL Calibration acquired, 1 POI AUV5 DIVE 9 Complete Complete Complete Complete DVL Calibration acquired AUV6 DIVE 11 Complete Complete Complete Complete - AUV2 DIVE 12 Complete Complete Complete Complete - AUV6 DIVE 13 Complete Complete Complete Complete 1 POI AUV2 DIVE 15 Complete Complete Complete Complete - AUV1 DIVE16 Complete Complete Complete Complete - AUV2 DIVE17 Complete Complete Complete Complete - AUV5 DIVE19 Complete Complete Complete Complete - AUV6 DIVE 20 Complete Complete Complete Complete 1 POI confirmation AUV7 DIVE 21 Complete Complete Complete Complete DVL Calibration acquired AUV2 DIVE 23 Ongoing Complete Complete Complete - AUV1 DIVE 24 Complete Complete Complete Complete 1 POI AUV5 DIVE 25 Complete Complete Complete Complete - AUV6 DIVE 26 Complete Complete Complete Complete DVL Calibration acquired AUV2 DIVE 27 Ongoing AUV5 DIVE 28 Complete Complete - - AUV1 DIVE 29 Complete Complete - - AUV7 DIVE 30 Complete Complete Complete Complete AUV6 DIVE 31 Complete Complete - - POI Dive Classification Report / Status Investigation Required C V 02 date 14/09/18 Conducted C V 02 date 14/09/18 Conducted C V 02 date 15/09/18 Conducted C V 02 date 15/09/18 Conducted C V 02 date 15/09/18 Conducted Contact with good reflectivity, detected twice at the end of the range. Shadow centre, good dimensions, no debris field, scour on both side. Mag out of range. Geological/marine life. Detection perfect with these settings. Metallic wreck with same dimensions of sought contact. A fishing vessel contact was previously listed some 330m from this site. Trawler on her side. Noticeable change in Geology, possible subsurface ferrous material to produce magnetic signature Good reflectivity with well defined shadow. Slight change in seabed facies. No scour observed, maybe debris field buried. Echo with high reflectivity. Significant scour and shape. Possible

5 POI Dive Classification Report / Status Investigation Required C V 02 date 15/09/18 Conducted C V 02 date 15/09/18 Conducted debris surrounding, very small shadow. High reflective contact. Significant shadow, possible scour. Possible debris field or area of boulders. Moderate to high reflectivity. Slight change in seabed facies. Fishing debris with related trawls or drag scars visible up to 2 km away. Net possible snagged on heavy subsurface, net only visible C V 02 date 18/09/18 Conducted C V 02 date 21/09/18 Conducted C V 02 date 21/09/18 Conducted Site-01/ Area-01 POI Listing: (Please Reference Table below for Classification Coding) High reflective contact. Well defined sharp shadow, scour observed 10mX20m. Sonar quality slightly distorted High reflective contact. Shadow not visible: contact is on the edge of depression. Slight facies change in surrounding seabed, Nothing with similar characteristics in the area. Dimensions are appropriate. High reflective contact with a significant shadow. Possible scour. Possible associated debris field with different shape and different size of contacts. Possible debris or old wreck, also seen on overlapping line. POI Class Definition Action Recommended A Identified as the ARA SJ debris Visually confirmed as ARA SJ debris B High Possibility From sensors, further investigation required C Strong Possibility From sensors, further investigation recommended D Unlikely Compatible From sensors and not worth immediate investigation, possibly geology/man-made debris E Identified as Incompatible No further action

6 AOB; Family Observers on board; o Luis Alberto Tagliapietra o Silvina Lucia Krawczyk o Fernando Rafael Arjona o José Luis Castillo Naval Observers on board o Héctor Aníbal Alonso o Juan Pablo Parant o Rubén Ignacio Di Marco Guard Vessel ARA Admiral Brown has returned to Site-01. Geographical coordinates for Area-05 have been relayed to the ARA Admiral Brown for patrolling purposes.

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