2- MISSION 2.1 To secure information on possible future need for shipboard air monitoring systems; an attempt to find the extent of airborne concentrations of beta decay products. 2.2 To determine if the present instrument design will fulfill such need for an adequate shipboard warning device. 3. TASKS AND PLAN OF ATTACK 3.1 Airborne Beta Level 3.1.1 Air monitor installations will be placed on forward mast platform (Able) and above radio shack (Baker). 3.1.2 Instruments will record beta level buildup, changing filter paper at preset intervals. Should recording rate meter reach full scale within an interval, filter paper will automatically change. Should change occur within a minute of previous change, alarm circuit will be thrown. (In this test the alarm circuit will be connected to a light bulb.) 3.1.3 Records will be processed to obtain figures for beta concentration per cubic meter of sampled air at any given time. 5.2 Instrument Design 3.201 Instruments will be checked after each operation to assure 3.2.2 Records will be scrutinized to determine if background that all automatic features have been properly functioning. levels, sampling methods, rate meter circuitry, etc. are of adequate design for future air monitoring problems. Necessary design changes as well as possible future problems will be indicated, 4. ADIITNISTRATIVS AND LOGISTICAL MATTERS Rollup) 4.1 (Test Preparation, Support, and Pre-Test Work atUSNRDL 4.1.1 Simileted test runs at USNRDL using Sr?° calibration samples and X-ray and gamma ray backgrounds will indicate the versatility of the instrument. Extra shielding and other adjustments as may be necessary will be added. lations 4.2 4.1.2 Instruments will be calibrated prior to shipboard instal- ST. LOUIS FRC Pre-Test Work on Transit Able and Baker at USNRDL Instruments are to be located and secured aboard Able and Baker in the San Francisco urea, operation. Power will be turned on to insure correct 3 : 2