Measurement of the earth's total magnetic field ahd seismic profile measurements between New Zealand and McMurdo Sound

In the first, the cable was slacked using the wire from the bathythermograph winch. Unfortunately the winch broke down. Good records were obtained over representative portions of the ship track, taking measurements at between two and ten minute intervals.

The second method was to lay out a two hundred yard manilla rope on the quarterdeck, slack it off and then recover it with the capstan winch. This proved successful except that too many deck hands were needed to handle the rope to make it possible to operate continuously. It was attempted to capture rain water at sea for measurements of tritium however, pure rainwater in the quantities needed for analysis was difficult to obtain.