1. Puget Sound Tow CTD chain Test January 4, 2011  Participants: Scientist : Frank Henyey, Barry Ma Captain : Eric Boget Engineer : Tim McGinnis, Tim Wen, Nicolas Michel-Hart SBE expert: Joel Reiter, Robin Clifford

2. TOWSBE  Tow chain system with inductive SBE microCATS  Steel armored cable (long-line fishing proof).  Real time inductive queries  Internal recording  Adjustable sensor amount and depth  Attachable Fairing system LabView interface

3. Puget Sound Trial January 4, 2011 New clamp design Swing with flow Fairing reduce drag and strumming Electronic housing SBE37IM x8 Depressor 80m Fairings 150 m armored coax sea-cable UIMM UIMMx1 15meter interval

4. January 4, 2011 TOWSBE Puget Sound Trial  8 SBE 37 IM sensors (C, T, P) with 150m armored cable  SBE sampling interval 10s, query 1 period: dn20 /3min, query2: dn10/3min  Towing speed 1~ 4 kts  Upper and lower boundaries mark the instrument depth  Black dots indicate near real-time data query during the Puget Sound Trial. query 1 query 2

5. Detail Ocean Structure Reviewed January 4, 2011 TOWSBE Puget Sound Trial

6. TOWSBE Puget Sound trial results  New clamp designs ensured the micorCATs swing freely  Armored sea cable has good inductive character for data transmission and also prevent potential damage from long-line fishing.  Ship speed over 4 kts affect inductive transmission. More query errors occurred. Possible caused by the cable strumming due to the upper 70m without fairings during the Puget Sound trial.  SBE37 IM #1 and #2 (top two sensors ) have more query errors (cable strumming? loaner units? older IMM model? without pump?)  microCATs internal recordings data are good. High resolution downloaded after TOWSBE recovery  Little flow effect observed on the microCATs conductivity data (need to further verify).  LabView interface and Matlab near real-time processing are tested. Data: SBE raw and Queried http://kirin.apl.washington.edu/~barry/TOWSBE_0104_2011/data/ Cable strumming video http://kirin.apl.washington.edu/~barry/TOWSBE_0104_2011/movie/Strumming0104.AVI

7. IWISE Field Program TOWSBE Spec  800m armored sea cable  Fully faired  ~ 40 microCATs sensors  ~10 HOBO U10 loggers  3-4 kts towing speed  High resolution T,C,P data internal recording  Real time inductive query for assessing ocean condition