Cas price - Day 3 29.02.2013 0700 Sleep was average. The rocking and the sound of the waves on the side of the ship sends you to sleep, but during the middle of the night the sea was rough and the ship was rocking so much I thought at any minute I?d roll of my bunk! 1100 Science meeting. The morning CTD launch has been cancelled again due to weather. Discuss doing chlorophyll analysis with the fluorometers. Go down to the cool room, take the samples out and leave them at room temperature for 30 minutes. I retire to my bunk. Dam ship- the gentle rocking puts me to sleep. Wake up. I've missed the chlorophyll analysis. Mix some acetone for chlorophyll sampling latter on. Hmm the ship seems like a bit of a time warp and I really have to think how many days have we been on the ship- even though its only day 3, it feels like a week. 1345 Prepare the CTD for launch. To do this we first have to empty the water sample in the niskin bottles from the previous launch. Then ensure each niskin bottle is opened at both ends, by hooking each end open. We close the water nozzles and make sure the underneath hoses are unattached, to allow the water to pass through the sensors. CTD is now ready to launch. 1400 Today I?m deploying the XBT's . We are deploying 6 (3 surface, 1 at each pressure, 200, 400 and 800). We deploy the XBT's at the same time as launching the CTD. This is to assist with comparing the temperature and depth on the XBT and the CTD. There is no pressure measurement on the XBT but the fall rate is used to determine the depth. XBT's have been used since the mid 1960?s to collect data in the upper 1000m of the ocean. As we are leaving the back deck we check out the CPR (Continuous Plankton Recorder), this has been used since sometime around the late 1800's or early 1900?s or so to collect zooplankton/ phytoplankton. The boys are changing it over and putting in a new cassette. It?s pretty cool to be on a scientific cruises learning and watching how to use all the scientific equipment we have only studied in class. Wait till the CTD is on deck to collect, nutrient, salinity, oxygen and chlorophyll samples for further analysis. 1815 Analyse more chlorophyll samples (I?ll explain this process a bit later- as its movie time).