1.5.2 Air monitoring equipment with appropriate connectors to power leads will be furnished by problem 6.4i. 1.5.3 Power leads aboard ABLE and BAKER to the instrument site will be installed by the Mare Island Naval Shipyard. Leads are two conductor, rated at 20 amps., furnishing 115v., 60cye power. Leads to be terminated in waterproof Amphenol plugs furnished by problem 6.4i. 1.5.4 Instruments to be located and secured aboard Able and Baker prior to west coast departure date. 1.5.5 Data removal will be accomplished by 6.4i. In case of overdose to 6.41 personnel, standby man from support group will remove data. 1.6 Assumptions and Limitations 1.6.1 Same as basic plan. 1.6.2 Assumptions 1.6.2.1 Airborne inhalation hazards may exist and are 1.6.2.2 Such hazards can be "magnified" in the internal independent of gamma background levels. spaces of a ship as a result of the ventilation system. 1.6.2.3 Adequate countermeasures (stoppage of ship blowers, wearing respirators) can be effective only while the hazard exists, indicating the necessity for a quick response warning system. 1.6.3 Limitations 1.6.3.1 The air monitor will-be designed to give warning within a minute if more than 0.3 microcuries of beta-emitting particles are present on the dust per cubic meter of air surrounding a ship. It is expected that this time lag is small enough to provide ample warning should a high concentration present itself. 1.6.3.2 The instrument is designed to record the presence of airborne beta contaminants in the presence of a fairly high gamma back- ground (10 r/hr; 200 kev gamma should give less than 10 percent full- scale reading).e Above some critical level the instrument will be made inoperative, but the immediate danger from bodily gamma exposure will then require effective countermeasures exceeding those necessary for the beta inhalation problem. _ ST, LOViS FRC 1.6.3.3 The instruments will be semi-portable in nature, weighing about 50 lb, so that they can be moved about a ship and plugged in an a.ce outlet. In this test, however, they will be tied to a specific location.