Information
Comments
We completed sampling the main circuit of eastern CEAMARC benthic sites yesterday at about 2100 hrs last night and then returned to the Polynya moorings to move the Pole Compass. The Polyna moorings are measuring the speed and direction of water currents through the water column using Acoustic Doppler Current Profilers (ADCP), but at this distance from the South Magnetic Pole (only about 135 miles WNW of the moorings) normal compasses are not accurate. The Pole Compass is designed to give accurate readings even when very close to the magnetic pole and will be positioned alongside each of the ADCP Polynya moorings for a few days in order to allow correction of the data from their simpler onboard compasses. The Pole Compass was redeployed by about 0500 this morning and then CEAMARC sampling resumed with the first of four sites (400m, 800m, 1600m and 2400m) in a transect over the edge of the shelf break. Regards, Martin and Sarah.
Map
A map showing Australia and Antarctica. The map shows the journey of one voyage that has occured in the season, with each route highlighted in a distinct colour.