Last updated: Friday 14th December 2017    

The weather,  thankfully,  improved overnight and by lunchtime on Friday the sun had managed to make a appearance.  The science work started early this morning and has been going well throughout the day,  with the James Clark Ross slowly moving further north between the science stations.  As dinner was being served CTD number seven was being deployed.  The first deployment was to just over 300m,  the last to about 3500m.  As they get deeper the time on station is extended.

The CTD entering the water this afternoon and about to descend to some 3.5km.  Note that the twenty-four bottles are open at the top.  They are also open at the bottom of the bottle so that as the CTD descends the water flows through the bottles.  If a bottle were to close and it descended with air inside,  it would implode under the pressure and likely damage other bottles and instruments.  Once the CTD has reached maximum depth it is stopped and then brought back up in stages to pre-determined depths when a bottle (sometimes more depending on how much water is needed) is fired.  This then collects a water sample from a known depth.

Whilst on station for this afternoons CTD cast this iceberg was close by and was rotating,  so we got to see if from all angles.

The current plan is that the James Clark Ross is due to arrive in Punta Arenas on the 21st December when a full crew change will take place.

Noon Position Report Friday 14th December  2017 

Latitude: 60 31.24 S
Longitude: 054 54.83 W
Bearing: 11 T, 35 Nm from Elephant Island
Cruise Number: JR17001
Distance Travelled: 192
Total Distance Travelled: 2648
Steam Time: 18.2
Total Steam Time: 291.7
Average Speed: 10.5
Total Average Speed: 9.1
Wind: Direction S, Force 4
Sea State: Rough
Air Temp: -1.2 C Sea Temp: 1 C
Pressure: 973.4 Tendency (3hrs): Rising


Previous updates from the current trip.

Mike Gloistein
gm0hcq @