Cruise Plan, Alford IWISE leg, June 10-20, 2011

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1 Cruise Plan, Alford IWISE leg, June 10-20, 2011 version 2; dated 5/20/2011 Overview/Objectives The following is the updated cruise plan for the mooring deployment leg (6/10-6/20) of the Internal Waves in Straits Experiment (IWISE) project. We will be working between Taiwan and the Philippines (Figure 1). Our general plan is to deploy moorings, gliders and PIES, recover 4 PIES that were previously deployed, and then to use any time remaining to work around the moorings with a series of 36-hour-long yo-yo CTD/lowered ADCP stations while they profile P7 P lat 20.5 N1 N2 MPN P8 P10 A1 P P9 P MPS S7S6 S lon 3000 Figure 1: Broad view of our work area and moorings to be deployed. The 8 moorings are in red; the 7 PIES are in yellow. Not shown are m thermistor chain moorings (T1-T4) to be deployed near N2. Selected Philippines 12-nm limits are shown. Our objectives are Deploy a total of 12 moorings and 7 PIES at the locations shown (Figure 1). All assets will be recovered at a later date (most from the Alford IWISE leg on Revelle, 8/4/2011-8/11/2011. Recover four PIES that we deployed last summer (locations near P10, P11, 12 and P13). 1

2 Deploy two gliders near N1. Use remainder of time doing 36-hour yo-yo CTD stations while holding station at locations TBD, probably near A1. Table 1: IWISE 2011 Moorings. All positions are given in decimal degrees. After deployment, please maintain 0.25 nm radius from all moorings. Station Lat Lon Depth Comments MPS N E 3696m profiling moorings S N E 1837m S E 1822m S E 2233m N N E 2040m N N E 1830m MPN N E 3653m A N E 1450m stablemoor float T N m 1000-m T-chain moorings; 2 km W of N2 T N m 1 km W of N2 T N m 1 km E of N2 T N m 2 km E of N2 P N E PIES P N E P N E P N E P N E P N E P N E Loadout We ll begin loading at 0800 on Gordon s demob day (6/7) as his offload is small. He has agreed to this plan, but of course if he winds up needing the day we will wait. We ll complete the loadout on 6/8 and 6/9. We have two 40 containers and two 20 containers that should be there by that time, as well as a few smaller air shipments. Our basic plan is to unload the containers onto the dock and begin prepping instruments and spheres dockside while the ship begins to crane the other gear on board. We ll install all instruments into our syntactic spheres prior to loading since accessing them will be more difficult on deck. Deck Plan The proposed deck plan is shown in Figure 2. Notably, there will be about floats, and 12 anchor stacks (4-5 wheels each). Also, in addition to the TSE winch we will have a traction winch on 2

3 loan from R/V Wecoma. The traction winch will be our primary winch for the deployments, with the TSE as a backup. The two 20 vans on the main deck will house glass floats for our moorings and deck storage. We ll be primarily based in the main lab. Gear Profiling moorings We will deploy seven profiling moorings (Figure 1, red), which consist of one or two crawlers making repeated traverses of a taut vertical wire with two subsurface floats (one steel, one syntactic foam) for flotation. These (and all moorings deployed on the cruise) are anchor last deployments. We will be using a traction winch on loan from OSU/Wecoma, and will launch the anchors with the trawl wire. A sample mooring diagram is given in Figure 3. T-chain moorings Four 1000-m-long subsurface T-chain moorings will be deployed in the vicinity of N2. See Figure 4 for a diagram. The others are nearly identical. Inverted Echo Sounder with Pressure (PIES) Seven PIES (Figure 5) will be deployed at the locations shown (Figure 1, yellow). These are very simple deployments. We will simply lower them over the side to the waterline and release them with a mechanical release. They then sink to the bottom, which takes about an hour. We will also recover four PIES that we deployed last summer (locations near P10, P11, 12 and P13). Stablemoor mooring Mooring A-1 features a stablemoor by Flotec, a 16-foot-long syntactic torpedo-shaped float (Figure 6). Other than its size which will require care in deployment, and the heavy weight of the anchor (7800#), it is a standard mooring. Figure 7 shows the mooring diagram. Gliders Two gliders will be launched during our cruise near N1. These are very simple procedures and should only take an hour or so. CTD/lowered ADCP stations After the deployments (time allowing) we plan to conduct several continuous 36-hour yoyo time series, as well as others to be determined based on the results of these initial ones. Please note we would like to do these, conditions permitting, within 10 of the bottom. At times when working on a slope this depth will be deeper than the water depth beneath the ship. We would like to slow to 30 m/minute 100 m above the bottom, and continue to 10 meters above the bottom at this speed and not slower. We want to work with the restechs to come up with a compromise that will ensure the safety of the rosette and allow us to accomplish our science goals, which require repeated measurements close to the bottom. 3

4 The CTD will be fitted with a lowered ADCP system. We plan on using the ship s brackets (the restech is already aware of this) and upward and downward 300-KHz workhorse ADCP s and a battery pack to the CTD frame. We will also likely attach a vane to allow special microstructure sensors on the package to face the flow past the cage as we did last August in the pilot (see Figure 8). We plan to use the SIO serial uplink CTD to send ADCP data up the wire, with the normal system as a backup. Timeline The primary goal is to get the moorings in the water, so we will work as quickly as safely possible. We ll rely on Meghan to tell us when we are working her too hard! A strawman order of events assuming all deployments go smoothly is given below. If things go slower than this then the 3.75 days of CTD yoyo work will be reduced. Table 2: Timeline. Date/Time What Comments 6/ depart KS 6/ arrive P11 recover PIES, deploy PIES 6/ arrive A1 deploy A1 6/ arrive MPN Deploy MPN 6/ arrive P10 Recover PIES, deploy PIES 6/ arrive N2 Deploy N2, T1, T2, T3, T4, N1 6/ finish above deploy P8 6/ arrive P9 deploy PIES 6/ arrive MPS Deploy MPS, S7 6/ arrive S6 Deploy S6, S9 6/ arrive P12 recover PIES, deploy PIES 6/ arrive P13 recover PIES, deploy PIES 6/ return to A1 Begin CTD yoyos 6/ arrive N1 deploy gliders 6/ depart for KS deploy P7 on way home 6/ arrive KS Personnel Science party and affiliations are as follows listed in Table 3. Note David Black (SIOglider tech) will be present for the loadout but will not sail, so please add him to the security lists so he can get a badge. 4

5 Table 3: Science Personnel. Who Role Inst. Matthew Alford Chief Scientist APL/UW Andy Pickering Grad Student APL/UW Zoe Parsons Technician APL/UW Eric Boget Engineer APL/UW Paul Aguilar Engineer APL/UW John Mickett Oceanographer APL/UW Jonathan Nash PI OSU Amy Waterhouse postdoc SIO Ke-Hsien Fu student NSYSU Chung-Wei Lu student NSYSU Val Borja clearance observer Philippines 5

6 5 PIES STANDS 5 5 ANCHORS JN capstain TSE winch ft container SPOOLS 20-ft container stablemoor traction winch spooler cast ANCHORS wire cage wire cage Mooring Gear Box wire cage wire cage wire cage Figure 2: Deck plan. 6

7 Top of float (60m depth) Flotec / Longranger (300m depth) IWISE S Thermister Chain (240m) Target: Actual: 'N 'E Depth: 2233m Depth: m m m m m m m m (2) 1/2 shackle 1/2 sling link (1) 1/2" shackle 1/2 Long link chain (2m) (1)1/2" shackle (1) (1) 5/8" shackle (1) 5/8" shackle (1) (1) 1/2 shackle 1/2 Long link chain (1m) (1) 5/8" shackle (1) 5/8" shackle 1/2 Long link chain (2m) (1) 5/8" shackles 3 ton swivel (1) (1) 1/2" shackle MP stopper ARGOS Beacon O.M.L. model 265 / Flasher S ARGOS ID# Beep? ARGOS On Time: ? Flasher On Time: Flash? ADCP model RDI 75Khz Long Ranger w/press. (Depth 300m) Start Time: Pinging? 45" Syntactic Foam Float 261 kg buoyancy (1500m) 5/16" 3x19 PP jacket wire rope (7m; 1.49kg) " Syntactic Foam Float kg buoyancy MP stopper (Depth 317m) Moored Profiler (s/n H1) Profile Range: MP Set-up: MP Start Time/Date: Line out: 0.393" PP jacket cortland line (1900m; 59.45kg 1881m cut) MP stopper (Depth m) 967.5m MP stopper MP stopper (Depth m) 966.5m MP stopper Moored Profiler (s/n H2) Profile Range: MP Set-up: MP Start Time/Date: Line out: MP stopper (Depth 2215m) 18.0m MP stopper SBE 37 MicroCat (Depth 2216m; 2.3 kg) Start time: 17.0m 16.0m 11.0m 9.5m (1) 1/2" shackle (1) (1) 1/2 shackle (1) 1/2" shackle 0.5m LL chain (1) (5) 1/2" shackle (3) 5/8" shackle (2) 3 links LL chain Drop link chain 5/8" shackle & 5" ring (8) Benthos model V glass floats (25.4 kg buoy. ea.) mounted in pairs on ½" long link chain (1m; 2.76 kg) SBE39 Temp. ext. w/press.; Att. to rel. (Depth 2222m; 0.70 kg) Logging? Start time: Benthos model 865 double acoustic release (25 kg each) Enable: Release: 1/2 Long link chain (1.5m) RX(khz): TX(khz): 8.0m (1) 3/4" shackle 3.0m 3/4 dia. Nylon line (5m) (1) 3/4" shackle (1) (1) 5/8" shackle 1/2 Long link chain (2m) (3) 5/8" shackle (2) 3 links LL chain 5 wheel RX(khz): Enable: TX(khz): Release: 1632 kg anchor plus Danforth (1420 kg in water) Start Deploy: Drop Anchor: Date: Time: Wind Dir / Spd: 7 Date: Time: Hdg / Spd: Figure 3: Mooring diagram for S9, a typical profiling mooring.

8 IWISE JN T-CHAIN #1 MOORING 2011 Target: 'N 'E Depth: 1594m Actual: Depth: m Top of float (571m depth) 1" shackle 5/8" shackle 3 ton swivel (2) 5/8" shackle m 60# lead strongback 5/8" shackle 1/2" shackle 1/2 Long link chain (1/2m) m m (2) 1/2" shackle (2) 1/2" shackle " Syntactic Foam Float kg buoyancy ARGOS ID# Flasher On Time: Beep / ? Flash? SBE 37 MicroCat (Depth 575m; 2.3 kg) Start time: SBE56 Temperature Logger Serial # Depth Distance Deploy Time 3/8" aramid line - Harper (1000m; 10.4kg) (4) Benthos model V glass floats (25.4 kg buoy. ea.) mounted in pairs on ½" long link chain (1m; 2.76 kg) 18.0m 16.0m (1) (3) 1/2" shackle (3) 5/8" shackle (2) 3 links LL chain ORE Acoustic Release model 8242XS (28 kg each) Enable: Release: Disable: Int (khz): 11 Rep (khz): m 13.0m Drop link chain 5/8" shackle & 5" ring 1/2 Long link chain (1.5m) 5/8" shackle 3/4 dia. Nylon line (10m) Enable: Release: Disable: Int (khz): 11 Rep (khz): m 1.0m (2) 5/8" shackle 5/8 sling link 1/2 Long link chain (2m) (3) 5/8" shackle (2) 3 links LL chain 4 wheel 1590 kg anchor plus Danforth (1384 kg in water) Start Deploy: Date: Time: Wind Dir / Spd: Drop Anchor: Date: Time: Hdg / Spd: 8 Figure 4: Mooring diagram for moorings T1-T4, to be deployed near N2.

9 Figure 5: A PIES ready for deployment. Figure 6: Stablemoor being deployed from R/V Wecoma. 9

10 IWISE JN STABLE MOORING 2011 Target: Depth: Actual: xx -xx.xxx'n xxx -xx.xxx'e Depth: 1447m m Top of float (80m depth) 45" Syntactic Foam Float 309 kg buoyancy (JN) ARGOS ID# Beep? ARGOS On Time: ? m (2) 1/2 316 shackle 0.5m x 1/2" 316 chain 1/2 316 shackle 1/2 shackle 1/2 shackle Flasher On Time: Flash? ADCP model RDI 300Khz Workhorse w/press. (Depth 80m) Start Time: Pinging? Cover? 3/8" aramid line - Harper (235m; 0.6kg 233m cut length) m m (2) 1/2" shackle (2) 1/2" shackle SBE 37 MicroCat (Depth 319m; 2.3 kg) Start time: 3/8" aramid line - Harper (235m; 0.6kg 233m cut length) Chipod OSU deep (Depth???m; 1.0kg) 893.0m (2) 1/2" shackle 5/16" 3x19 PP shakedown jacket wire rope (150m; 31.9kg) Chipod OSU deep (Depth???m; 1.0kg) Stablemoor 1500 Syntactic Foam Float 765 kg buoyancy (JN) SABLE ID# ? 743.0m 1/2" shackle 5/8" shackle Flasher On Time: UP - ADCP RDI 75Khz Long Ranger w/press. (Depth 705m) Start Time: Flash? Pinging? 740.0m (2) 5/8" shackles 3 ton swivel (2) 5/8" shackle 60# lead strongback (2) 5/8" shackle DN - ADCP RDI 75Khz Long Ranger w/press. (Depth 706m) Start Time: Pinging? SBE 37 MicroCat (Depth 705m; 2.3 kg) Start time: 5/16" 3x19 PP shakedown jacket wire rope (520m; 110.7kg) 220m (1) (2) 5/8" shackle 3/8" aramid line - Harper (190m; 2.0kg 188m cut length) (8) Benthos model V glass floats (25.4 kg buoy. ea.) mounted in pairs on ½" long link chain (1m; 2.76 kg) ORE Acoustic Release model 8242XS (28 kg each) 30.0m (1) (5) 5/8" shackle 8 8 Enable: Release: 26.0m (3) 5/8" shackle (2) 3 links LL chain 8 8 Disable: Int (khz): 11 Rep (khz): m Drop link chain 3/4" shackle & 5" ring Enable: Release: 23.0m 1/2 Long link chain (1.5m) 3/4" shackle Disable: Int (khz): 11 Rep (khz): 12 1 dia. Nylon line (20m) 3.0m (2) 3/4" shackle 3/4 sling link 1/2 Long link chain (2m) 7800# cast anchor 1.0m 3/4" shackle Mace Start Deploy: Date: Time: Wind Dir / Spd: Drop Anchor: Date: Time: Hdg / Spd: 10 Figure 7: Mooring diagram for the Stablemoor (A1).

11 Figure 8: The CTD system as configured on our Revelle cruise last August. 11

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