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Extremely Low Frequency (ELF) for Anti-Submarine Warfare (ASW)

Award Information

Agency:
Department of Defense
Branch:
Navy
Award ID:
82806
Program Year/Program:
2008 / SBIR
Agency Tracking Number:
N072-120-0007
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
Navmar Applied Sciences Corporation
65 West Street Road Building C Warminster, PA -
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 2
Fiscal Year: 2008
Title: Extremely Low Frequency (ELF) for Anti-Submarine Warfare (ASW)
Agency / Branch: DOD / NAVY
Contract: N68335-09-C-0072
Award Amount: $749,652.00
 

Abstract:

A submarine immersed in seawater behaves like a short-circuited galvanic cell which, because of variations in resistance (as a function of propeller shaft angle) between the rotating propeller shaft and its bearings, may produce an electric current that is modulated at the shaft rate. Corrosion currents arise from differences in electrical potential among the interconnected dissimilar metals on the outside of a submarine: copper (in the bronze propeller), iron (in the steel hull), and zinc (in the hull-protecting sacrificial electrodes). Generally, the largest currents flow between the propeller and the nearest zincs giving rise to a current which flows from the propeller through the submarine into the water back to the propeller. Modulation of the submarine's corrosion currents gives rise to ELF emissions. A fixed-site ELF sensor offers the relative advantages of freedom from platform and geological noise, much longer integration times, the ability to exploit the vector nature of the signature, and a much larger separation in frequency between the Extremely Low Frequency Emission (ELFE) signal and the ferromagnetic signal. During Phase 1, Navmar identified a design concept for the ELF buoy. During phase 2, design details will be refined, and units will be fabricated for concept demonstration testing.

Principal Investigator:

Richard Coughlan
Principal Investigator
2156754900
coughlan@navmar.com

Business Contact:

Robert E. Bauder
Vice President, Director
6106197443
bauder@navmar.com
Small Business Information at Submission:

NAVMAR APPLIED SCIENCES CORP.
65 West Street Road Building C Warminster, PA 18974

EIN/Tax ID: 232054431
DUNS: N/A
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No