ICEBERG "BOMBED" FOR TRACKING.—An iceberg off the coast of Labrador is labelled with large streaks of bright vermilion dye embedded between its two peaks for future identification and tracking by means of a calcium-rhodamine “B” dye bomb dropped from the rear cargo doorway of a United States Coast Guard Lockheed Hercules ice patrol plane. The indelible stain enables observers to determine more accurately the rate of drift and measure rates of ice deterioration over a long period. Coast Guardsmen are making their most intensive assault on floating icebergs in the North Atlantic shipping lanes, marking them, keeping track of them, and notifying ships of their locations.

Press, Volume CVI, Issue 31340, 10 April 1967, Page 13

ICEBERG "BOMBED" FOR TRACKING.—An iceberg off the coast of Labrador is labelled with large streaks of bright vermilion dye embedded between its two peaks for future identification and tracking by means of a calcium-rhodamine “B” dye bomb dropped from the rear cargo doorway of a United States Coast Guard Lockheed Hercules ice patrol plane. The indelible stain enables observers to determine more accurately the rate of drift and measure rates of ice deterioration over a long period. Coast Guardsmen are making their most intensive assault on floating icebergs in the North Atlantic shipping lanes, marking them, keeping track of them, and notifying ships of their locations.