ae...... ‘ and current methods of predicting free-field effects. The remaining four classes of radiation fall into the category of residual radiations. In 17.5, current knowledge of the effects of transit radiation from airborne sources is summarized, and available methods of predicting transit radiation aboard ship are discussed. In 17.6, radiation from activity deposited on ships' weather surfaces is discussed. Weapons-test data are summarized and methods of predicting deposit radiation effects aboard ship are presented. Radiation aboard ship from water contaminated by a nuclear burst is discussed in 17. 7. The discussion includes available weapons-test data and theoretical calculations, and indicates that negligible radiation from waterborne sources would penetrate combatant ships later than 1 hour after burst. Section 17.8 summarizes effects of radiation from contaminated air with- \ in a ship including available weapons-test data. 17-3