Lehner P. 1965 JAN. 22 today we ran the guywire census; there is a large Boerhavia die off radiating out from the Frigate colony; about 90% of the Amaranthus on the island is dying off; at 1030-45 we took the first pictures of the Sooty Tern plots - we expect to continue the photographic record by taking pictures of the plots every Friday; LORAN C was off the air all morning, but the chances were good that it would be transmitting again by mid-afternoon - I took one cannon and one blasting charge to the other end and set it up, taking the shunt off the charge to see if the radio signal from LORAN C would set it off; as close time approached they were still not on the air so I set it off with the blasting machine, using a small 2x4 for a drag - the cannon was at ~35° angle - when fired, it tore loose from the drag and carried about 300 ft., giving a good demonstration of its capabilities.