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Contact

Sonar Data…

Contact 122 was detected by Mary Ann during Mission 061A on 18 & 19-Apr-09. It was upgraded to Target 5 after a detailed analysis.

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Contact 122/Target 5: 600m range - 75kHz frequency

Target2_600m_75khz-MAG.jpg

Contact 122/Target 5: 600m range - 75kHz frequency (magnified)

CONTACT REPORT

Contact Designation: #122

Assessment Criteria

1

2

3

4

5

Reflectivity: returned signal strength, relative and perceived

X

Overall dimensions: size

X

Overall geometry: shape

X

Associated bottom: debris field

X

Associated bottom: surrounding geology

X

Man-made versus natural: straight lines, perfect circles

X

Contact Location: Box 12C

Overall Rating: 4.2 / 5

Comments:
This target has very high relative reflectivity with no associated geology around it. It is not natural. It is approximately 18.8 meters long and 4.5 meters wide. The Electra’s wingspan is 16.8 meters and it is 11.8 meters long. The target is close in size but not quite wide enough as it is oriented on the sonar record. The image could be stretched like the 55 gallon drum. We do not anticipate definitive shape characteristics or definition at this range scale. This target shows promise even though it is smaller than expected. There are 2 additional small targets around 1700 meters to the North that could be associated debris.

See Re-Imaging…