COLLECTING SURFACE FOR ALL INSTRUMENTS 20 ft O for ship stations 15 ft O for barge and How /and stations SPACE RESERVED FOR OTHER INSTRUMENTS ALWAYS OPEN TOTAL COLLECTOR (AOC,) OPEN CLOSE TOTAL COLLECTOR (OCC) CONTROL UNIT INCREMENTAL COLLECTOR (iC) HIGH VOLUME FILTER UNIT (HVF) Center line of ship SPACE RESERVED FOR OTHER INSTRUMENTS TIME INTENSITY RECORDER DETECTOR HEAD SPACE RESERVED FOR OTHER INSTRUMENTS Figure 2.2 Plan and elevation of major sampling array. 34