to be brought back to the west by the trade winds. Is was estimatedthat the contamination was of the aercsal-type and that approximately half of the ob= served intensities were due to 4 ’shine’ affect from a transiting volume of contaminated air. Consequently, is wes agreed that CTG 7.1 would recomend no departure of ships in anticipation <f cessation of the fall<ut and “shine! within a few houree At 0230M, 25 March, CTIG 7.1 received additional information to the effect that use of wash-down systems had reduced by a factor of two. The advisory mentioned the EPPERSON contact of 25 mr/hr, 50 NM northwest of Bikini and -noted no significant change on the return trip to Bikini by the EPPERSON. Air concentration was reported as 0.02 microcuries per cubic foot, activity distributed cver all stagea of the cascade impactor with the high- est reading on the final stage. At O430M, 29 March, information was received from CTU 7.3 that fallout a: had ceased, that after wash-dow, the highest readings were 20 ur/hr average, 27 ar/hr maximm on the RENSHAW and that the TARE heliccop~ter pad read 48 mr/he at 0315M. ‘The advisory indicated that active radsafe measures were being continued as necessary and all ships resuming 2-hour notice fcr getting underway Le? —m/|m Me, ale ~ ~