(4) In general, boats operating in waters near shot islands after shot times may become contaminated. Monitors shall be aboard all boats operating after shot time, either as passengers or members of the boat crew, until such time as radiological restrictions are lifted. (5) No ships with personnel shall be permitted inside the 1.5. p.s.i. line unless specifically directed otherwise. Bearings of danger from immediate radioactive fall-out for ship operations will be established by CJTF SEVEN on the basis of forecast wind directions at the intended time of detonation. This danger section will be designated as surface radex. All ships of the task force shall be required to remain outside the surface radex ~ danger bearing, radial limita- tion and time restriction. However, if ships are directed tactically into the surface radex, movement of ships shall be governed by tactical exposure guides. (6) Individuals on board ships of the task force shall be protected collectively from hazards of blast, heat and radioactivity by movement of the ships. (7) It is desired to point out that the employment of the ships and units in TG 7.3, insofar as radiological safety is concerned, is not considered routine usage within the purview of NavMed P-1325, "Radiclogical Safety Regulations." Current revision of NavMed P-1325 indicates that its provisions will not apply for special operations such as field tests and that for such operations naval personnel will operate under regulations set forth by the task force commander. The reg- ulations set forth herein have been designed as a reasonable and safe compromise considering conservation’ of personnel exposures, the international import of tests and the cost aspects of shot delays chargeable to excessive radiological precautions. d. Aircraft MPLs: (1) The interior surfaces of occupied sections of aircraft should be reduced to 7 mr/hr. (2) No aircraft in the air at H Hour will be at slant ranges from ground zero less than as determined by the following effects unless specifically directed otherwise. (Based on maximum predicted yield and 20 mile visibility): Blast (at predicted shock arrival): 0.5. p.s.i. Thermal (H Hour): Fabric control surfaces: 1.0 cal/cm2 Metal control surfaces: 6.0 cal/cm2 After detonation no aircraft shall operate inside the air radex or closer than 10 nautical miles from the rising or visible cloud unless specifically directed otherwise. If a tactical or emergency situation arises where aircraft must enter the air radex, tactical exposure allowance shall apply. (3) All multi-engine task force aircraft in the air at H Hour within 100 miles of the detonation point shall carry a person designated as 443