APL-UW Home

Jobs
About
Campus Map
Contact
Privacy
Intranet

Tim McGinnis

Head, OE Department & Sr. Principal Engineer

Email

tmcginnis@apl.washington.edu

Phone

206-543-1346

Research Interests

Oceanographic Equipment Design, System Engineering

Biosketch

Tim McGinnis's main interest and expertise is in deep ocean engineering and equipment design. For over 30 years, Tim has been involved with a variety of towed and bottom landing vehicle development projects, deep ocean cabled observatories, and at-sea operations for mapping, imaging, sensing, and sampling the seafloor and water column in water depths to 5000 meters.

Tim joined APL-UW in 2001 and was the System Engineer for the development of the NEPTUNE/MARS power system. Since then has been involved with a number of mooring and profiler developments and deployments at the Laboratory. He is now working on the Ocean Observing Initiative Regional Scale Nodes (RSN) project where he is the lead for ROV-mateable connectors, secondary seafloor extension cables, and development of the Deep Profiler.

Department Affiliation

Ocean Engineering

Education

B.S. Engineering, University of Washington, 1983

Publications

2000-present and while at APL-UW

Inductive power mooring lines for OOI's shallow and deep profilers

McGinnis, T., G. Cram, and E. Boget, "Inductive power mooring lines for OOI's shallow and deep profilers," Sea Techol., 61, 14-18, 2020.

More Info

1 Apr 2020

As oceanographers seek to deploy their field sensors for longer subsea campaigns, advances in mooring line construction and technology are enabling new approaches to moorings. No longer is the mooring line a passive element; instead, the development of the first inductive power mooring line by high-performance fiber-rope maker Pillystran allow it to function as an integral part of the oceanographic monitoring system.

An inductive charging and real-time communications system for profiling moorings

Alford, M.H., T. McGinnis, and B.M. Howe, "An inductive charging and real-time communications system for profiling moorings," J. Atmos. Ocean. Technol., 32, 2243-2252, doi:10.1175/JTECH-D-15-0103.1, 2015.

More Info

1 Dec 2015

We describe a system for providing power and communications to moored profiling vehicles. A McLane Moored Profiler (MP) was equipped with a rechargeable battery pack and an inductive charging system to allow it to move periodically to a charging dock at the top of the subsurface mooring. Power was provided from a large bank of alkaline batteries housed in two 0.95-m steel spheres. Data were transferred inductively from the profiler to a mooring controller, and from there back to shore via radio and Iridium satellite modems housed in a small surface communications float on an "L" tether. An acoustic modem provided backup communications to a nearby ship in the event of loss or damage to the surface float. The system was tested in a 180-m-deep fjord (Puget Sound, WA) and at station ALOHA, a 4748-m deep open-ocean location north of Hawaii. Basic functionality of the system was demonstrated, with the Profiler repeatedly recharging at about 300W (with an overall efficiency of about 70%). Data were relayed back to shore via Iridium, and to a nearby ship via the radio and acoustic modems. The system profiled flawlessly for the entire 6-week test in Puget Sound, but charging at the deep site stopped after only 9 days in the deep-ocean deployment owing to damage to the charging station, possibly by surface wave action.

A smart sensor web for ocean observation: Fixed and mobile platforms, integrated acoustics, satellites and predictive modeling

Howe, B.M., Y. Chao, P. Arabshahi, S. Roy, T. McGinnis, and A. Gray, "A smart sensor web for ocean observation: Fixed and mobile platforms, integrated acoustics, satellites and predictive modeling," IEEE J. Sel. Top. Appl. Earth Obs. Remote Sens., 3, 507-521, doi:10.1109/JSTARS.2010.2052022, 2010.

More Info

1 Dec 2010

In many areas of Earth science, including climate change research and operational oceanography, there is a need for near real-time integration of data from heterogeneous and spatially distributed sensors, in particular in situ and space-based sensors. The data integration, as provided by a smart sensor web, enables numerous improvements, namely, (1) adaptive sampling for more efficient use of expensive space-based and in situ sensing assets, (2) higher fidelity information gathering from data sources through integration of complementary data sets, and (3) improved sensor calibration. Our ocean-observing smart sensor web presented herein is composed of both mobile and fixed underwater in situ ocean sensing assets and Earth Observing System satellite sensors providing larger-scale sensing.

An acoustic communications network forms a critical link in the web, facilitating adaptive sampling and calibration. We report on the development of various elements of this smart sensor web, including (a) a cable-connected mooring system with a profiler under real-time control with inductive battery charging; (b) a glider with integrated acoustic communications and broadband receiving capability; (c) an integrated acoustic navigation and communication network; (d) satellite sensor elements; and (e) a predictive model via the Regional Ocean Modeling System interacting with satellite sensor control.

More Publications

Inventions

Deep Underwater WIFI Antennas for AUV

Record of Invention Number: 47664

Mike Kenney, Tim McGinnis, Nick Michel-Hart, Chris Siani

Disclosure

28 Mar 2016

Deep Underwater WIFI Antennas for AUV

Record of Invention Number: 47607

Mike Kenney, Yasuo Kuga, Tim McGinnis, Nick Michel-Hart, Chris Siani

Disclosure

28 Jan 2016

Acoustics Air-Sea Interaction & Remote Sensing Center for Environmental & Information Systems Center for Industrial & Medical Ultrasound Electronic & Photonic Systems Ocean Engineering Ocean Physics Polar Science Center
Close

 

Close