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Gyro Dop Nav
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2018
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Sentry
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Project Title: |
Development of a Low-Cost True-North Seeking Fiber Optic Gyrocompass and Integrated Doppler Navigation System for Precision Navigation of Underwater Vehicles for Ocean Science |
Project Status: |
Submitted |
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Principal Investigator: |
Louis Whitcomb, JHU |
Project Institution: |
JHU |
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Project ID: |
104291 |
Version #: |
4 |
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Date Submitted: |
2/17/2014 10:50:00 AM |
Created By: |
Louis Whitcomb |
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Date Last Modified: |
3/30/2017 2:05:00 PM |
URI Serial #: |
None |
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Funding Agencies: |
NSF/OCE/OTIC - 1435818 - Funded |
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Summary of Field Work: |
Perform field trials of a new underwater vehicle navigation system with the Sentry AUV. Goal is to do a Sentry downward-looking multibeam survey of a small seafloor feature with the new navigation system running in parallel with the existing Sentry on-board and ship based USBL navigation system. There may be synergy here with other science ops, i.e. these data, if successful, could possibly provide some additional science survey deliverables from what is primarily an engineering performance experiment.
Because the new gyrocompass instrument to be installed on Sentry will not interfere with its standard navigation instruments, these proposed dives could be "piggy-backed" on regular Sentry multibeam survey science dives.
Ship could be any vessel capable of supporting Sentry Ops -- Global Class or Ocean/Intermediate Class would suit. |
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Summary of Facility Requirements: |
Shipboard
- Multibeam.
- ADCP
- CTD
- Support (deck space, cranes, tuggers, etc) for Sentry ops.
- Support for Sentry's Sonardyne USBL (or equivalent)
Sentry with
- Downward Looking Reson 7125 multibeam sonar or equivalent
- 300 kHz Bottom-Lock Doppler Sonar
- PHINS INS
- Soanrdyne USBL Navigation, with cassius calibration performed very
early in the cruise at a similar depth to site depth. |
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Summary of other requirements and comments: |
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Type of Request: |
Ancillary |
Request Status: |
Submitted |
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Request ID: |
1006854 |
Created By: |
Louis Whitcomb |
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Date Last Modified: |
3/30/2017 2:05:00 PM |
Date Submitted: |
2/17/2014 10:50:00 AM |
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Year: |
2018
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Ship/Facility: |
Sentry
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Optimum Start Date:
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1/1/2018 |
Dates to Avoid: |
N/A |
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Earliest Start Date: |
10/1/2017 |
Multi-Ship Op: |
Yes |
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Latest Start Date: |
8/1/2018 |
Other Ship(s): |
Global Class or Ocean/Intermediate Class Ship to deploy Sentry |
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Operating Days Needed: |
Science Days |
Mob Days |
De-Mob Days |
Estimated Transit Days |
Total Days |
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3 |
2 |
1 |
0 |
6 |
Repeating Cruise?
(within same year) |
No |
Interval: |
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# of Cruises: |
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Description of Repeating cruise requirements: |
Shorter leg desired as we only need 3 days ship time. |
Justification/Explanation for ship choice, dates,
conflicts, number of days & multi-ship operations: |
N/A |
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Short Description of Op Area
for use in schedules: |
2500m or less |
| Description of Op Area: |
Not geographically constrained except that we would like
(a) 2500 m or shallower site to ensure very accurate USBL tracking;
(b) ideally some scientifically relevant topography to map as an engineering experiment to quantify the accuracy of the new navigation system;
(3) a shorter leg would be desirable if possible as we are not utilizing many ship days. |
| Op Area Size/Dia.: |
10 |
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Lat/Long |
Marsden Grid |
Navy Op Area |
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Beginning
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Ending
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Show Degrees Minutes |
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Foreign Clearance Required? |
No |
Coastal States:
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 Important Info on Foreign Research Clearances
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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)?
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No |
If yes, have you applied for the necessary permits through your export control office?
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No |
| Questions about ITAR/EAR regulations?
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Comments about foreign clearance requirements or
description of any other special permitting requirements
(e.g., MMPA, ESA, IHA, Marine Sanctuaries, etc.) |
N/A |
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Requested Start Port |
Intermediate Port(s) |
Requested End Port |
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None, |
None |
None, |
Explanation/justification for requested
ports and dates of intermediate stops
or to list additional port stops |
Not geographically constrained except that we would like
(a) 2500 m or shallower site to ensure very accurate USBL tracking;
(b) ideally some scientifically relevant topography to map as an engineering experiment to quantify the accuracy of the new navigation system;
(3) a shorter leg would be desirable if possible as we are not utilizing many ship days. |
Important Info on Working in Foreign Ports
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Chief Scientist: |
Louis Whitcomb, JHU |
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# in Science Party |
3 |
# of different science teams |
1 |
# Marine Technicians to be
provided by ship operator:
(include in science party total)
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5 |
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Explanation of Science Party Requirements and Technician Requirements |
We will be a science party of 3 in addition to the Sentry OPS team (usually 4-5). |
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 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 | | |
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Explain Instrumentation or Capability
requirements that could affect choice
of ship in scheduling. |
The purpose of these operations is to test a new attitude reference during multibeam survey operations. These multibeam operations could be combined with other science multibeam operations. It would be desirable, but not required, if the requested days were not contiguous, i.e. 1.5 days for an initial Sentry multibeam survey dive, complete, followed by the ship doing other operations for a short period, then 1.5 days for another multibeam survey dive.
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Explain Major Ancillary Facilities
Requirements and list description
and provider for "other" systems. |
N/A |
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