| Chester2004 — Dataset Notes | |
| December 15, 2004 15:00 — January 2, 2005 00:00 | |
| collected under ice cover | |
| Chester2004 — Sonde Cleaning/Calibrations | |
| March 2, 2004 14:00 | |
| May 11, 2004 12:00 | cleaned |
| May 27, 2004 10:00 | cleaned |
| June 11, 2004 12:00 | cleaned & turbidity calibrated |
| June 18, 2004 13:00 | cleaned |
| July 28, 2004 09:00 | cleaned |
| August 5, 2004 14:00 | cleaned |
| August 27, 2004 12:30 | cleaned |
| October 7, 2004 08:30 | cleaned |
| October 22, 2004 09:00 | cleaned |
| November 5, 2004 14:30 | cleaned and calibrated |
| December 17, 2004 15:30 | cleaned |