Chapter 3.  Changes to the document 
Changes with respect to the version 1.1 of the SPIRE-PACS Parallel Mode Observers' Manual:
- 
latest SPIRE and PACS photometers in-flight sensitivities have been adopted in  Table 2.1
- 
new scan leg separation for "Nominal" scanning direction: 168"
- 
new "Map centre offset" parameter available
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added Figure 2.6, Figure 2.7 and Figure 2.8; updated Figure 2.4 and  Figure 2.5
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typos and other minor updates
Changes with respect to the version 1.0 of the SPIRE-PACS Parallel Mode Observers' Manual:
- 
latest SPIRE and PACS photometers predicted sensitivities have been adopted in  Table 2.1
- 
added Figure 2.5 and updated Figure 2.4
- 
parameter limit "Height" has been changed to 232' in  Table 2.2