Browser Settings for its Cache

Radar loops work best when your web browser has correct settings for checking web page timestamps of pages in its web cache.

Use a setting like 'Automatic' if it is available.

When 'Automatic' is available, do not choose Every-visit or Every-time or equivalent - it will generate too much web traffic, and time delays will disturb radar loops.

However, when there is no 'Automatic' setting, (e.g. in V4 browsers) it is OK to choose Every-visit or Every-time or equivalent.

• In Microsoft Internet Explorer, click TOOLS then click INTERNET OPTIONS...
  (or on old versions click VIEW then INTERNET OPTIONS...).
  In the 'General' tab, there is a heading 'Temporary Internet Files'.
  Click the 'Settings...' button.
  Where is says 'Check for newer versions of stored pages:',
  choose 'Automatic' if it exists. If not choose 'Once per session' or 'Every visit'.

• In Netscape Navigator, click EDIT, then PREFERENCES.
  Open the topic ADVANCED, and click on CACHE.
  See 'Document in cache is compared to document on network:'.
  Click 'Automatic' if it exists. If not choose 'Once per session'.
  (Avoid clicking 'Every time').

• In Opera, click FILE, then PREFERENCES, then HISTORY and CACHE.
  In the box labelled 'Check Modified', for DOCUMENTS, IMAGES and OTHER, choose some number of hours or days (and avoid choosing 'Always').

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