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Chapter 7 - SAR Marking the Contact
Humminbird HELIX for Search and Rescue Operations
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6m 15s
Up Next in Humminbird HELIX for Search and Rescue Operations
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Chapter 8 - Survey Patterns
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Credits - Helix DVD
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Why Do fish Reflect Strongly Black Laser
A quick explanation of why fish reflect strongly when imaged with echosounders or side scan sonar systems
