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A variety of instruments have been attached to the CPR to record physical variables (Table 1). Simple temperature loggers have been most commonly used and 3 CTDs have been trialled. The most recent, the Brancker XR620, has proven to be the most reliable, returning 100% of the data in 2 full deployments along the east-west transect (previous Chelsea Instrument’s CTDs suffered from vibrations occurring during the tow and often stopped recording). Figure 1 shows the CTD fitted under the tail section of the CPR and Figure 2 some of the data.

In all cases position of each data record is calculated from the ship’s log and the internal clock of the instrument. Such instruments can be fitted to each CPR, it is only financial constraints that limit their deployment. The Brancker will remain on the east-west CPR during its 2008 deployments.

Table 1. Catalogue of physical data collected

Transect	Dates	Temperature	Salinity	Depth	Chl-a	Notes
N-S	21-26 Mar, 2000					Vemco temp. logger
N-S	17-22 Jun, 2000					Vemco temp. logger
N-S	19-21 Jul, 2000					Vemco temp. logger
N-S	23-29 Aug 2000					Vemco temp. logger
N-S	22-27 Apr 2001					Vemco temp. logger
N-S	20-25 May 2001					Vemco temp. logger
N-S	28 Jun - 4 Jul 2001					Vemco temp. logger
N-S	10-16 Aug 2001					Vemco temp. logger
N-S	21-24 Sep 2001					Vemco temp. logger
N-S	28 May - 25 Jun 2002					Vemco temp. logger
N-S	29 July - 3 Aug 2002					Vemco temp. logger
N-S	22 Oct - 3 Nov 2002					Vemco temp. logger
E-W	1-12 June 2002					Vemco temp. logger
E-W	5-16 Oct 2002					Vemco temp. logger
E-W	1-15 Apr 2003					Vemco temp. logger
E-W	1-11 Jun 2003					Vemco temp. logger
E-W	28 Sep - 7 Oct 2003					Vemco temp. logger
E-W	2-16 Oct 2004					CI Aquapack
E-W	29 May - 9 Jun 2005					CI Minipack
E-W	17-24 Sep 2005					CI Minipack, incomplete transect
E-W	4-6 May 2006					CI Minipack, incomplete transect
E-W	8-11 Jul 2006					CI Minipack, incomplete transect
E-W	20 Sep - 1 Oct 2006					Vemco temp. logger
E-W	12 Mar - 3 Aprl 2007					Brancker XR620
E-W	27 May - 9 Jun 2007					Brancker XR620
E-W	13 May - 24 May 2008					Brancker XR620
E-W	7 July - 18 July 2008					Brancker XR620
E-W	7 Sep - 18 Sep 2008					Brancker XR620
E-W	30 Apr - 11 May 2009					Brancker XR620
E-W	30 Jun - 13 July 2009					Brancker XR620
E-W	27 Aug - Sep 6 2009					Brancker XR620
E-W	2-13 Jul 2010					Brancker XR620
E-W	5-14 May 2010					Brancker XR620
E-W	6-17 Sep 2010					Brancker XR620