2. When the staff is waterborne, cast off the handling lines, 

 keeping them clear of the contact points, and continue to lower the 

 damping disk. Allow slack in the electrical cable and retrieving 

 line. 



3. Turn the main power supply switch to the "On" position and 

 mark the point on the chart paper when the staff becomes upright in 

 the water and settles to its normal depth. About six feet of the 

 staff should be projecting above the surface in calm water. 



lu Pay out the cable, with the floats or life rings attached, 

 and the damping disk retrieving line. Allow slack at all times. If 

 either becomes taut, the staff will list and will not record correctly. 

 Pay out both line and cable, jeach of which is about 1,000 feet long, 

 until at least 7 minutes (preferably 20 minutes) of record have been 

 made from the time the staff became upright. If the cable should run 

 out and become taut during the recording, shut off the recorder and 

 mark the point on the chart, and then haul the staff an appropriate 

 distance toward the ship by means of the damping disk retrieving 

 line. Some of the cable should be retrieved at the same time to 

 prevent excessive slack and possible fouling of the damping disk. 



D. Retrieving the Electric Wave Staff 



1. After the run is completed, turn off the main power and haul 

 in the retrieving line and cable, keeping the strain on the line and 

 not on the cable. 



2. When the staff is alongside, retrieve the handling lines with 

 a boat hook or grapnel. With the two handling lines and the damping 

 disk retrieving line, hoist the staff and damping disk aboard. 



3. Lay the staff on deck, keeping the contact points clear of 

 the deck or any metal objects. Stand clear of the gage and turn 

 the main power switch to "On" position. Check to see that the zero 

 trace has returned to the lowest line of the chart paper (the one 

 nearest the front of the case). If the zero trace is more than 5 

 lines above this, the gage section should be cleaned with fresh 

 water, dried, and waxed, and the entire run should be repeated. 



lu If the zero trace has returned properly to the lower line, 

 then turn off the main power switch and disassemble the wave staff. 

 Wipe dry the step-resistance gage section and clean and grease the 

 coupling joints. It may be necessary to wash down the gage section 

 with fresh water occasionally to prevent a coat of salt from forming, 

 which would tend to hold a film of water on the gage., This film 

 would produce erroneous recordings. 



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