|
|
Cascadia GPS-A
-
2020
-
Ocean/Intermediate
|
|
|
|
Project Title: |
Assessing the State of Locking on the Frontal Thrust of the Cascadia Subduction Zone with Seafloor Geodesy |
Project Status: |
Submitted |
|
Principal Investigator: |
C. D. Chadwell, SIO |
Project Institution: |
SIO |
|
Project ID: |
105464 |
Version #: |
4 |
|
Date Submitted: |
8/9/2016 5:57:00 PM |
Created By: |
C. D. Chadwell |
|
Date Last Modified: |
2/4/2021 6:16:00 PM |
URI Serial #: |
None |
|
Funding Agencies: |
NSF/OCE/MGG - 1657961 - Funded |
|
Summary of Field Work: |
In year 1, deploy seafloor geodetic transponders and benchmarks for the sea surface using dynamically position ship at two sites along the Cascadia subduction zone. In year 3, recover the transponders from the two seafllor sites. |
|
Summary of Facility Requirements: |
In year 1, require a dynamically-positioned ship with a crane. In year 3, require a ship with a crane. |
|
Summary of other requirements and comments: |
|
|
|
Type of Request: |
Collaborative Ship Use |
Request Status: |
Submitted |
|
Request ID: |
1010427 |
Created By: |
C. D. Chadwell |
|
Date Last Modified: |
2/4/2021 6:16:00 PM |
Date Submitted: |
3/12/2019 1:44:00 PM |
|
|
Year: |
2020
|
Ship/Facility: |
Ocean/Intermediate
|
|
Optimum Start Date:
|
8/1/2020 |
Dates to Avoid: |
Need summer months mid-June through mid-Sept for seasonal weather window to conduct a single ~2-day-long ROV Jason at site ~ 40 nm offshore Coos Bay Oregon. |
|
|
|
|
|
|
Earliest Start Date: |
7/1/2020 |
Multi-Ship Op: |
No |
|
Latest Start Date: |
9/15/2019 |
Other Ship(s): |
N/A |
|
|
Operating Days Needed: |
Science Days |
Mob Days |
De-Mob Days |
Estimated Transit Days |
Total Days |
|
2 |
1 |
0 |
2 |
5 |
Repeating Cruise?
(within same year) |
No |
Interval: |
N/A |
# of Cruises: |
|
|
|
Description of Repeating cruise requirements: |
N/A |
Justification/Explanation for ship choice, dates,
conflicts, number of days & multi-ship operations: |
Any Global or Ocean Class vessel with dynamic positioning capable of conducting ROV Jason dives in ~ 1500 m water depths is sufficent. |
|
Short Description of Op Area
for use in schedules: |
Coos Bay GPS-A |
| Description of Op Area: |
Site is approximately 40 nm offshore Coos Bay in ~1100 m water depth. |
| Op Area Size/Dia.: |
~ 3 nm |
|
|
| |
Lat/Long |
Marsden Grid |
Navy Op Area |
|
Beginning
|
43.5734° N
/
125.1035° W
map
43° 34.404' N
/
125° 6.21' W
map
|
|
|
|
Ending
|
43.5734° N
/
125.1035° W
map
43° 34.404' N
/
125° 6.21' W
map
|
|
|
| |
Show Degrees Minutes |
|
|
|
|
|
Foreign Clearance Required? |
No |
Coastal States:
US EEZ |
 Important Info on Foreign Research Clearances
|
|
Are you or any member in your science party bringing in any science equipment items which are regulated for export by the International Traffic in Arms Regulations (ITAR) and/or the Export Administration Regulations (EAR)?
|
No |
If yes, have you applied for the necessary permits through your export control office?
|
No |
| Questions about ITAR/EAR regulations?
|
Comments about foreign clearance requirements or
description of any other special permitting requirements
(e.g., MMPA, ESA, IHA, Marine Sanctuaries, etc.) |
N/A |
|
|
Requested Start Port |
Intermediate Port(s) |
Requested End Port |
|
Newport, OR, USA |
None |
Newport, OR, USA |
Explanation/justification for requested
ports and dates of intermediate stops
or to list additional port stops |
Proposed dive site is ~40 nm NW of Coos BayOregon. |
Important Info on Working in Foreign Ports
|
|
|
|
Chief Scientist: |
C. D. Chadwell, SIO |
|
# in Science Party |
3 |
# of different science teams |
1 |
# Marine Technicians to be
provided by ship operator:
(include in science party total)
|
1 |
|
Explanation of Science Party Requirements and Technician Requirements |
Requesting ROV Jason dive to place three acoustic transponders on three existing permanent concrete benchmark already deployed on the seafloor at the site. Benchmarks are appoximately 1 nm apart. Science party will handle transponder preparation, but assume restech and ROV operators will be available to support handover of transponder to Jason. |
|
 Dynamic Positioning |  ADCP | Multibeam | Seismic |
| Dredging/Coring/Large Dia. Trawl Wire | Stern A-frame | Fiber Optic (.681) | 0.680 Coax Wire |
| SCUBA Diving | Radioisotope use - briefly describe | NO Radioisotope use/Natural level work | Other Operator Provided Inst. - Describe |
| 0 PI-Provided Vans - briefly describe | MOCNESS | | |
|
Explain Instrumentation or Capability
requirements that could affect choice
of ship in scheduling. |
Need dynamic positioning to maintain ship overtop of the target sites on the seafloor to allow ROV Jason to place transponder precisely on ~ 1 meter diameter benchmark.
|
|
|
|
Explain Major Ancillary Facilities
Requirements and list description
and provider for "other" systems. |
Require ROV Jason to precisely place three acoustic transponders into the registration frame of three permanment concrete benchmark deployed at the dive site. Bechmarks are ~ 1 nm apart and in ~ 1100 m deep waters. Each of the three transponder is ~ 0.5 meters in diameter and presumably carried down in Jason's sample basket. Jason completed similar work in 2014 at four sites offshore Newport for our group. |
|
