Framed notice relating to air pump, covered with plastic. Hand written in green and red felt tip pen. Reads 'AIR PUMP/ COMPRESSOR OPERATOR/ CHECK FUEL OIL IN ENGINE/ TURN OFF ALL WHEEL VALVES/ PRESS AND TURN TO RIGHT, VALVE ON/ LARGE CYL OF COMPRESSOR/ START ENGINE/ 120LBS PRESSURE MUST BE AVAILABLE/ BEFORE DIVER DESCENDS./ DRAIN WATER FROM RELIEF VALVE/ BY TURNING KNURLED SCREW AT/ BASE OF VALVE./ AIR PRESSURE ON CHANGE OVER/ VALVE 150 P.S.I./ OPERATOR MUST STAND BY PUMP/ AT ALL TIMES IT IS IN USE.'