Position: 88 34.5' N, 176 39' W, temperature - 14 C, air pressure 1035 hPa, wind 2 knots from N. Ice drift 0.1 knot towards ENE. Worked on mounting the hydraulics for the winch. The winch and all hoses had to be thawed out. Started calibration run for the string of the sea water temperature loggers, but aborted due to problems with the meter wheel. Had problems with the signal from the 3.5 kHz echo sounder transducer, but the signal came back - the cause of the problem remains unexplained. The water depth is 3988 meter