Digest>November 2003
Photo By:
Chris Mills
Photo Caption:
Tom Roberts, a marine aids technician for Canada’s Department of Fisheries and Oceans (Coast Guard division) tells visitors about the TRB-400 lighthouse lens. These acrylic Fresnel-lensed systems have replaced the old glass Fresnel lenses in many light towers. Back to the edition of: November 2003
Story:
Let There Be Light! ... And Sound!
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